Biology Prodigy Test #3 (Part Test)

Botany - Section A

1. Consider the following statements:

I:	If fatty acids were to be respired, they would enter the respiratory pathway as acetyl CoA.
II:	Glycerol enters the respiratory pathway after being converted to PGAL.
III:	Amino acids enter the respiratory pathway at some stage within the Krebs cycle but never as pyruvate or acetyl CoA.

1. Only II is incorrect
2. Only III is incorrect
3. Both I and III are incorrect
4. I, II and III are correct

2.

The growth of a root elongating at a constant rate will be represented by:

1.	A only	2.	B only
3.	Both A and B	4.	Neither A nor B

3. In plants:

I:	Growth is open
II:	Differentiation is open

1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect

4. Which of the following growth regulators is a carotenoid derivative?

1.	Auxin	2.	Cytokinin
3.	Ethylene	4.	Abscisic acid

5.

The first step for initiation of photosynthesis will be:

1.	Photolysis of water
2.	Excitement of chlorophyll molecule due to absorption of light
3.	ATP formation
4.	Glucose formation

6. Consider the two given statements:

Assertion (A):	In aerobic cellular respiration the presence of oxygen is vital.
Reason (R):	Oxygen acts as the final hydrogen acceptor.

1.	Both (A) and (R) are True and (R) correctly explains (A)
2.	(A) is True but (R) is False
3.	(A) is False but (R) is True
4.	Both (A) and (R) are True but (R) does not correctly explain (A)

7. When the CO₂ : O₂ is nearly equal, the affinity of RuBisCO is:

1.	equal for both
2.	much higher for carbon dioxide
3.	much higher for oxygen
4.	slightly higher for oxygen

8.

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

1.	Increasing atmospheric CO₂ concentration up to 0.05% can enhance the CO₂ fixation rate
2.	C₃ plants respond to higher temperatures with enhanced photosynthesis while C₄ plants have much lower temperature optimum
3.	Tomato is a greenhouse crop that can be grown in CO₂ enriched atmosphere for higher yield
4.	Light saturation for CO₂ fixation occurs at 10% of full sunlight

9.

Which one of the following is wrong in relation to photorespiration:

1.	It occurs in chloroplasts
2.	It occurs in the daytime only
3.	It is a characteristic of C₄ plants
4.	It is a characteristic of C₃ plants

10.

It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
1. Cytokinin and Abscisic acid
2. Auxin and Ethylene
3. Gibberellin and Cytokinin
4. Gibberellin and Abscisic acid

11. C₄ plants are special. Which of the following will be true for C₄plants?

(a)	They have a special type of leaf anatomy
(b)	They tolerate higher temperature
(c)	They show a response to high light intensities
(d)	They lack a process called photorespiration
(e)	They have greater productivity of biomass

1.	All except (e)
2.	(b), (c) and (d) only
3.	All
4.	(a), (b), (d) and (e) only

12. How many of the following can be characterized as action of gibberellins on plants?

I:	They can be used to increase the length of grape stalks.
II:	They can elongate and improve the shape of apple.
III:	They speed up malting process in brewing industry.
IV:	They hasten the maturity period of juvenile conifers.
V:	They promote bolting in many plants with rosette habit.

1.	2	2.	3
3.	4	4.	5

13. Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
1. Glucose-6-phosphate
2. Fructose 1, 6-bisphosphate
3. Pyruvic acid
4. Acetyl Co-A

14.

During the conversion of succinyl CoA to succinic acid in TCA cycle:
1. One molecule of ATP is directly synthesized
2. ${NAD}^{+}$ is reduced
3. FAD is reduced
4. One molecule of GTP is synthesized

15. During glycolysis, an ATP molecule is synthesised during the conversion of:

I:	BPGA to 3-phosphoglyceric acid (PGA)
II:	PEP to pyruvic acid

1. Only I
2. Only II
3. Both I and II
4. Neither I nor II

16. Consider the given two statements:

Assertion (A):	The Calvin cycle actually occurs only in the dark or during night time.
Reason (R):	The Calvin cycle is also called as ‘Dark’ reactions.

1.	(A) is True but (R) is False
2.	Both (A) and (R) are True and (R) correctly explains (A)
3.	Both (A) and (R) are True and but (R) does not correctly explain (A)
4.	(A) is False but (R) is True

17. Consider the given two statements:

Statement I:	Green house crops such as tomatoes and bell pepper are allowed to grow in carbon dioxide enriched atmosphere. This leads to higher yields.
Statement II:	C₃ plants respond to higher carbon dioxide concentration by showing increased rates of photosynthesis, leading to higher productivity.

1.	Both Statement I and Statement II are correct and Statement II explains Statement I
2.	Both Statement I and Statement II are correct but Statement II does not explain Statement I
3.	Statement I is correct but Statement II is incorrect
4.	Statement I is incorrect but Statement II is correct

18.

In leaves of C₄plants, malic acid synthesis during CO₂fixation occurs in:

1.	epidermal cells	2.	mesophyll cells
3.	bundle sheath	4.	guard cells

19.

Match each item in Column I with one in Column II and select the correct match from the codes given:

	Column I		Column II
A	Chlorophyll a	P	Bright or blue green in chromatogram
B	Chlorophyll b	Q	Yellow green in chromatogram
C	PS I reaction centre	R	P680
D	PS II reaction centre	S	P700

Codes:

	A	B	C	D
1.	Q	P	R	S
2.	Q	P	S	R
3.	P	Q	S	R
4.	P	Q	R	S

20.

Sucrose is converted into glucose and fructose by the enzyme:

1.	Sucrase	2.	Aldolase
3.	Invertase	4.	Zymase

21.

Match each item in Column I with one in Column II and select the correct match from the codes given:

	Column I [Type of cellular respiration]		Column II [terminal electron acceptor]
A	Aerobic	P	Inorganic molecule other than oxygen
B	Anaerobic	Q	Oxygen
C	Fermentation	R	Organic molecule

Codes:

	A	B	C
1.	R	Q	P
2.	Q	P	R
3.	Q	R	P
4.	P	Q	R

22.

The stage of cellular respiration that directly involves oxygen is:

1.	glycolysis
2.	at the end of ETC
3.	Krebs cycle
4.	the phosphorylation of ADP to form ATP

23. Consider the given two statements:

Statement I:	When only PS I is functional, the electron is circulated within the photosystem and the phosphorylation occurs due to cyclic flow of electrons.
Statement II:	Cyclic photophosphorylation also occurs when only light of wavelengths beyond 680 nm are available for excitation.

1.	Both Statement I and Statement II are correct
2.	Both Statement I and Statement II are incorrect
3.	Statement I is correct but Statement II is incorrect
4.	Statement I is incorrect but Statement II is correct

24.

The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Triphosphate (ATP) is formed because:

1.	high energy bonds are formed in mitochondrial proteins
2.	ADP is pumped out of the matrix into the inter-membrane space
3.	a proton gradient forms across the inner membrane
4.	there is a change in the permeability of the inner mitochondrial membrane toward Adenosine Diphosphate (ADP)

25.

Which plant growth regulator is used to initiate flowering and synchronising fruit-set in pineapples?

1.	Gibberellins	2.	Cytokinins
3.	ABA	4.	Ethylene

26. Identify the correct statements regarding chemiosmotic hypothesis:

(a)	Splitting of the water molecule takes place on the inner side of the membrane.
(b)	Protons accumulate within the lumen of the thylakoids.
(c)	Primary acceptor of electron transfers the electrons to an electron carrier.
(d)	NADP reductase enzyme is located on the stroma side of the membrane.
(e)	Protons increase in number in stroma.

Choose the correct answer from the options given below:
1. (a), (b) and (e)
2. (a), (b) and (d)
3. (b), (c) and (d)
4. (b), (c) and (e)

27.

Pyruvate dehydrogenase activity during aerobic respiration requires:

1.	Calcium	2.	Iron
3.	Cobalt	4.	Magnesium

28.

Identify the incorrectly matched pair:

	Scientist	PGR discovery
1.	Cousins	Ethylene
2.	Kurosawa	Gibberellin
3.	Skoog and Miller	ABA
4.	F. W. Went	Auxin

29. The water-splitting complex in green plants is associated with:

1.	PS I, which itself is physically located on the inner side of the membrane of the thylakoid.
2.	PS I, which itself is physically located on the outer side of the membrane of the thylakoid.
3.	PS II, which itself is physically located on the inner side of the membrane of the thylakoid.
4.	PS II, which itself is physically located on the outer side of the membrane of the thylakoid.

30.

Glycerol enters the respiratory pathway after being converted to:

1.	PGAL	2.	PEP
3.	1, 3 – BPG	4.	2 – PG

31.

Removal of shoot tips is a very useful technique to boost the production of tea leaves. This is because:

1.	Gibberellins prevent bolting and are inactivated.
2.	Auxins prevent leaf drop at early stages.
3.	Effect of auxins is removed and the growth of lateral buds is enhanced.
4.	Gibberellins delay the senescence of leaves.

32. Conversion of sucrose into glucose and fructose is catalyzed by:

1.	Phosphofructokinase	2.	Aldolase
3.	Hexokinase	4.	Invertase

33.

Identify the incorrectly matched pair:

	PGR	Chemical nature
1.	Auxins	Indole compounds
2.	Cytokinin	Pyrimidine derivatives
3.	ABA	Carotenoid derivative
4.	Gibberellic acid	Terpenes

34. In aerobic oxidative phosphorylation, the final electron acceptor of the electron transport chain is:

1.	NAD⁺	2.	oxygen
3.	pyruvate	4.	water

35.

The electron transport system in mitochondria is located in the:
1. Inner mitochondrial membrane
2. Outer mitochondrial membrane
3. Inter membrane space
4. Matrix

Botany - Section B

36. At low light conditions, which of the following groups of plants responds to high CO₂conditions?

1.	C₃	2.	C₄
3.	Both C₃ and C₄	4.	Neither C₃ nor C₄

37.

Consider the given statements:

Statement I:	In alcohol fermentation in yeast, pyruvic acid decarboxylase and alcohol dehydrogenase convert pyruvic acid to carbon dioxide and ethanol.
Statement II:	In lactic acid fermentation, lactate dehydrogenase reduces pyruvic acid to lactic acid and carbon dioxide in muscle cells during exercise.

1.	Both Statement I and Statement II are correct
2.	Both Statement I and Statement II are incorrect
3.	Statement I is correct but Statement II is incorrect
4.	Statement I is incorrect but Statement II is correct

38. The glycolytic pathway has an investment of 2 ATP molecules. At which of the following steps is the debt paid off?

1.	Conversion of Glucose into Glucose-6-phospahte
2.	Conversion of Fructose-6-phosphate into Fructose 1,6-biphospahte
3.	Conversion of 1,3 biphoshoglyceric acid into 3-phosphoglyceric acid
4.	Conversion of Phosphoenol pyruvate into Pyruvic acid

39. Identify the incorrectly matched pair:

	Respiratory Complex	Pathway for electron transport
1.	NADH dehydrogenase	NADH – FMN – [Fe-S] – Q
2.	Succinic dehydrogenase	FADH₂ – FMN - Q
3.	Cytochrome bc₁	Cyt b – [Fe-S] – Cyt c₁
4.	Cytochrome c oxidase	Cu_A – Cyt a – Cyt a₃ – Cu_B

40.

The energy-releasing metabolic process in which substrate is oxidized without an external electron acceptor is called:
1. glycolysis
2. fermentation
3. aerobic respiration
4. photorespiration

41.

What is the role of NAD⁺ in cellular respiration?

1.	It functions as an enzyme
2.	It functions as an electron carrier
3.	It is a nucleotide source for ATP synthesis
4.	It is the final electron acceptor for anaerobic respiration

42.

Auxins:

I:	promote flowering in pineapples
II:	induce parthenocarpy in tomatoes
III:	like 2,4-D kill monocot weeds
IV:	control xylem differentiation

1.	Only I and II are correct
2.	Only III is incorrect
3.	I, II, III and IV are correct
4.	Only I and IV are incorrect

43. In the chloroplast:

Statement I:	The membrane system is the site of enzymatic reactions leading to synthesis of sugar.
Statement II:	The stroma is responsible for trapping the light energy and also for the synthesis of ATP and NADPH.

1.	Both Statement I and Statement II are correct
2.	Both Statement I and Statement II are incorrect
3.	Statement I is correct but Statement II is incorrect
4.	Statement I is incorrect but Statement II is correct

44. In Hatch and Slack pathway:

I:	The C₄ acid OAA is formed in the mesophyll cells.
II:	Malic acid or aspartic acid are transported to the bundle sheath cells.
III:	C₄ acids are broken down to release carbon dioxide and a 3 carbon molecule in mesophyll cells.
IV:	The 3 carbon molecule is transported back to the bundle sheath cell where it is converted to PEP again.

1.	Only I and II are correct
2.	II, III and IV are incorrect
3.	Only I, II and III are correct
4.	I, II, III and IV are correct

45. Regarding the thylakoid membrane:

I:	Plastoquinone is located within the membrane
II:	Plastocyanin is located on the inner lumen side of the membrane
III:	NADP reductase is located on the stroma side of the membrane

1.	Only I and II are correct
2.	Only I and III are correct
3.	Only II and III are correct
4.	I, II and III are correct

46. Given below are two statements:

Statement I:	The primary CO₂ acceptor in C₄ plants is oxaloacetate and is found in the mesophyll cells
Statement II:	Mesophyll cells in C₄ plants carry out Calvin cycle.

In the light of the above statements, choose the correct answer from the options given below :

1.	Statement I is incorrect but Statement II is correct
2.	Both Statement I and Statement II are correct
3.	Both Statement I and Statement II are incorrect
4.	Statement I is correct but Statement II is incorrect

47.

Callus from internodal segments of tobacco stem gets proliferated only if in addition to one of the following – extracts of vascular tissues, yeast extract, coconut milk or DNA, the nutrient medium also contains:

1.	Auxins	2.	Gibberellins
3.	ABA	4.	Ethylene

48. Fruit and leaf drop at early stages can be prevented by the application of:
1. Ethylene
2. Auxins
3. Gibberellic acid
4. Cytokinins

49.

Which one of the following acids is a derivative of carotenoids?
1. Indole-butyric acid
2. Indole-3-acetic acid
3. Gibberellic acid
4. Abscisic acid

50.

Which one of the following pairs is not correctly matched?

1.	Abscisic acid - Stomatal closure
2.	Gibberellic acid - Leaves fall
3.	Cytokinin - Cell division
4.	IAA - Cell wall elongation

Zoology - Section A

51.

Consider the two statements:

I:	The process of filtration at Malpighian body is regarded as ultrafiltration.
II:	Blood is filtered so finely that all constituents of plasma pass into the lumen of Bowman’s capsule.

1.	Both I and II are correct and II explains I
2.	Both I and II are correct but II does not explain I
3.	I is correct but II is incorrect
4.	I is incorrect but II is correct

52.

The characteristics and an example of a synovial joint in humans are:

	Characteristics	Examples
1.	Fluid-filled between two joints, provides cushion	Skull Bones
2.	Lymph filled between two bones, limited motion	Gliding joint between carpals
3.	Fluid-filled synovial cavity between two bones	Joint between atlas and axis
4.	Fluid cartilage between two bones, limited motion	Knee joint

53.

Match the Column I and Column II:

	Column I		Column II
(a)	P-waves	(i)	Depolarisation of ventricles
(b)	QRS complex	(ii)	Repolarisation of ventricles
(c)	T-wave	(iii)	Coronary ischemia
(d)	Reduction in the size of T-wave	(iv)	Depolarisation of atria
		(v)	Repolarisation of atria

Select the correct option:

Options:	(a)	(b)	(c)	(d)
1.	(ii)	(iii)	(v)	(iv)
2.	(iv)	(i)	(ii)	(iii)
3.	(iv)	(i)	(ii)	(v)
4.	(ii)	(i)	(v)	(iii)

54.

Consider the following statements:

I:	70% of ventricular filling is due to the passive opening of AV valves.
II:	Lub is caused by the simultaneous closure of both AV valves.
III:	Dub is caused by simultaneous closure of both the semilunar valves.

Which of the above statements are true?

1.	I and II only	2.	I and III only
3.	II and III only	4.	I, II, and III

55.

The diagram given here is the standard ECG of a normal person, The P - wave represents the:

1. Initiation of the ventricular contraction
2. Beginning of the systole
3. End of systole
4. Contraction of both the atria

56. The somatic neural system relays impulses from:

1.	the CNS to skeletal muscles
2.	the CNS to the involuntary organs and smooth muscles of the body
3.	the skeletal muscles of the CNS
4.	the involuntary organs and smooth muscles of the body to the CNS

57.

The figure shows a diagrammatic view of the human respiratory system with labels A, B, C, and D. Select the option that gives the correct identification, main function, and/or characteristics:

1.	B-pleural membrane- surrounds ribs on both sides to provide cushion against rubbing.
2.	C-alveoli-thin walled vascular bag-like structures for the exchange of gases.
3.	D-lower end of the lungs-diaphragm pulls it down during inspiration.
4.	A trachea-long tube supported by complete cartilaginous rings for conducting inspired air.

58.

The nodal musculature of the heart has the capability to generate impulse:

1.	on stimulation by the sympathetic division of the autonomic nervous system
2.	on stimulation by the parasympathetic division of the autonomic nervous system
3.	on stimulation by the somatic neural division of the peripheral nervous system
4.	without any external stimulus

59.

The first heart sound is heard during:

1.	beginning of ventricular systole
2.	end of ventricular systole
3.	atrial systole
4.	ventricular ejection

60.

Match the items given in Column-I with those Column-II and select the correct option given below:

	Column-I (Function)		Column-II (Part of the Excretory system)
(a)	Ultrafiltration	(i)	Henle's loop
(b)	Concentration of urine	(ii)	Ureter
(c)	Transport of urine	(iii)	Urinary bladder
(d)	Storage of urine	(iv)	Malpighian corpuscle
		(v)	Proximal convoluted tubule

Options:	(a)	(b)	(c)	(d)
1.	(iv)	(v)	(ii)	(iii)
2.	(iv)	(i)	(ii)	(iii)
3.	(v)	(iv)	(i)	(ii)
4.	(v)	(iv)	(i)	(iii)

61.

Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (mostly in the nucleus)?
1. Insulin and glucagon
2. Thyroxin and insulin
3. Somatosatin and oxytocin
4. Cortisol and testosterone

62.

During the transmission of nerve impulses through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?

1.	First negative, then positive, and again back to negative
2.	First positive, then negative, and continue to be negative
3.	First negative, then positive, and then continues to be positive
4.	First positive, then negative, and again back to positive

63.

The binding of oxygen with hemoglobin is primarily related to:

1.	Partial pressure of carbon dioxide
2.	Partial pressure of oxygen
3.	H⁺ ion concentration in body fluids
4.	Presence of 2,3-DPG in erythrocytes

64.

Erythropoietin, hormone which stimulates R.B.C. formation, is produced by:

1.	The cells of bone marrow
2.	Juxtaglomerular cells of the kidney
3.	Alpha cells of the pancreas
4.	The cells of the rostral adenohypophysis

65.

Which of the following statements is correct?

1.	The descending limb of loop of Henle is impermeable to water.
2.	The ascending limb of loop of Henle is permeable to water.
3.	The descending limb of loop of Henle is permeable to electrolytes.
4.	The ascending limb of loop of Henle is impermeable to water.

66. Consider the two statements:

Assertion (A):	As the filtrate passes upward in the ascending limb of the Loop of Henle, it gets diluted.
Reason (R):	The ascending limb is impermeable to water but allows the transport of electrolytes actively or passively.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	Both (A) and (R) are False.

67.

Person with blood group AB is considered as universal recipient because he has:

1.	both A and B antigens on RBC but no antibodies in the plasma
2.	both A and B antibodies in the plasma
3.	no antigen on RBC and no antigens in the plasma
4.	both A and B antigens in the plasma but no antibodies

68.

The pivot joint between atlas and axis is a type of:

1.	Cartilaginous joint	2.	Synovial joint
3.	Saddle joint	4.	Fibrous joint

69.

All the following are parts of human axial skeleton except:

1.	Sternum	2.	Vertebrae
3.	Hyoid	4.	Scapula

70.

The total number of floating ribs in human skeleton is:

1.	2	2.	4
3.	6	4.	14

71. Consider the given two statements:

Assertion (A):	Terrestrial adaptation necessitated the production of lesser toxic nitrogenous wastes like urea and uric acid.
Reason (R):	Terrestrial organisms must conserve water.

1.	(A) is True but (R) is False.
2.	Both (A) and (R) are True but (R) does not correctly explain (A).
3.	Both (A) and (R) are True and (R) correctly explains (A).
4.	(A) is False but (R) is True.

72.

Match the source gland with its respective hormone as well as the function.

	Source gland	Hormone	Function
(a)	Posterior pituitary	Vasopressin	Stimulates reabsorption of water in the distal tubules in the nephron
(b)	Corpus luteum	Prolactin	Supports pregnancy
(c)	Thyroid	Thyroxine	Regulates blood calcium level
(d)	Anterior pituitary	Oxytocin	Contraction of uterus muscles during childbirth

1. (a)
2. (b)
3. (c)
4. (d)

73.

A diagram showing the axon terminal and synapse is given. Identify correctly at least two of A-D:

1. B- Synaptic connection; D- K⁺
2. A- Neurotransmitter; B- Synaptic cleft
3. C- Neurotransmitter; D- Ca⁺⁺
4. A- Receptor; C- Synaptic vesicles

74. Contraction of diaphragm:

1.	increases the diameter of thorax in dorso-ventral axis and brings about inhalation
2.	decreases the diameter of thorax in dorso-ventral axis and brings about exhalation
3.	increases the diameter of thorax in antero-posterior axis and brings about inhalation
4.	decreases the diameter of thorax in antero-posterior axis and brings about exhalation

75. The end of systole is marked on the ECG by:
1. Beginning of P wave
2. End of the Q wave
3. End of the T wave
4. Beginning of S wave

76. Identify the correct match for the lobes of cerebrum shown in the given figure:

A:	Frontal lobe	Planning, reasoning and problem solving
B:	Parietal lobe	Integrating sensory information, including touch, temperature, pressure and pain
C:	Occipital lobe	Location of the primary visual cortex which receives visual information from the eyes
D:	Temporal lobe	Contains the primary auditory cortex, which receives auditory information from the ears

1.	Only A and B	2.	Only A, B and C
3.	Only B, C and D	4.	A, B, C and D

77.

Match each item in Column I [Hormone] with one in Column II [Chemical class] and select your answer from the codes given:

	Column I		Column II
A.	ACTH	a.	Peptide
B.	Estradiol	b.	Steroid
C.	Thyroxine	c.	Amino-acid derived
D.	Epinephrine	d.	Iodothyronine

Codes:

	A	B	C	D
1.	a	b	c	d
2.	a	b	d	c
3.	b	a	d	c
4.	b	a	c	d

78.

Identify the wrong statement with reference to transport of oxygen:

1.	Partial pressure of CO₂ can interfere with O₂ binding with haemoglobin.
2.	Higher H⁺ concentration in alveoli favours the formation of oxyhaemoglobin.
3.	Low pCO₂ in alveoli favours the formation of oxyhaemoglobin.
4.	Binding of oxygen with haemoglobin is mainly related to partial pressure of O₂.

79.

Match each item in Column I with one in Column II and select the correct match from the codes given:

	Column I		Column II
A	Glucagon	P	Hyperglycaemic
B	Insulin	Q	Hypoglycaemic
C	Parathyroid hormone	R	Hypercalcaemic
D	Thyrocalcitonin	S	Hypocalcaemic

Codes:

	A	B	C	D
1.	P	Q	R	S
2.	P	Q	S	R
3.	Q	P	S	R
4.	Q	P	R	S

80.

Graves' disease is caused due to:
1. hyposecretion of thyroid gland
2. hypersecretion of thyroid gland
3. hyposecretion of adrenal gland
4. hypersecretion of adrenal gland

81. The peptide thyroid hormone that lowers calcium and phosphate ion concentration in the blood is:
1. thyroxine
2. triiodothyronine
3. calcitonin
4. thyroid-stimulating hormone

82.

The figure given below shows a small part of the human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function?

1.	A – Alveolar cavity – main site of exchange of respiratory gases
2.	D – Capillary wall – exchange of O₂and CO₂ takes place here
3.	B – Red blood cell – transport of CO₂ mainly.
4.	C – Arterial capillary – passes oxygen to tissues

83. Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilisation:
1. Insulin
2. Glucagon
3. Secretin
4. Gastrin

84.

Favourable conditions for the oxygenation of haemoglobin at alveoli include all the following except:
1. High pO₂
2. Low pCO₂
3. Low pH
4. Low temperature

85.

Identify the correct statement regarding the pineal gland or the hormone secreted by it:

1.	The gland is situated on the ventral side of the forebrain
2.	The hormone secreted by the gland is called as melanin
3.	The hormone regulates the diurnal rhythm of our body
4.	The hormone decreases immunity

Zoology - Section B

86.

Consider the following two statements:

I:	The lungs are situated in the thoracic chamber which is anatomically an air-tight chamber.
II:	This arrangement is essential as we cannot directly alter the thoracic volume.

1.	Both I and II are correct and II correctly explains I
2.	Both I and II are correct but II does not explain I
3.	I is correct and II is incorrect
4.	Both I and II are incorrect

87.

Consider the following statements:

I:	The diffusing capacity of CO₂ across the respiratory membrane is higher than that of O₂
II:	The presence of Hb increases the efficiency of O₂ transport by about 10 times.
III:	Carbon monoxide binds to Hb with much more tenacity with respect to O₂

Which of the above statements are true?

1.	I and II only	2.	I and III only
3.	II and III only	4.	I, II, and III

88.

Assertion(A):	Absence of mitochondria in mature human RBCs increases the efficiency of oxygen delivery at tissues by them.
Reason (R):	RBCs do not need ATP

1.	Both (A) and (R) are True but (R) does not correctly explain (A).
2.	(A) is True but (R) is False.
3.	Both (A) and (R) are True and (R) correctly explains (A).
4.	(A) is False but (R) is True.

89. Consider the two statements:

Assertion (A):	Adrenal medullary hormones can increase the cardiac output.
Reason (R):	Adrenal medullary hormones are steroids with prominent effects on osmoregulation and glucose homeostasis in human body.

1.	Both (A) and (R) are True and (R) correctly explains (A).
2.	(A) is True but (R) is False.
3.	Both (A) and (R) are True but (R) does not correctly explain (A).
4.	(A) is False but (R) is True.

90. A motor neuron along with the muscle fibres connected to it constitutes a:

1.	Neuro-muscular junction
2.	Motor end plate
3.	Sarcomere
4.	Motor unit

91.

Sliding filament theory can be best explained as:

1.	when myofilaments slide past each other, actin filaments shorten while myosin filament does not shorten
2.	actin and myosin filaments shorten and slide past each other
3.	actin and myosin filaments do not shorten but rather slide pass each other
4.	when myofilaments slide past each other, myosin filaments shorten while actin filaments do not shorten

92. Consider the two statements:

Assertion (A):	An excess of aldosterone can cause a decrease in potassium ion concentration in body fluids.
Reason (R):	Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na⁺ and water.

1.	Both (A) and (R) are True but (R) does not correctly explain (A).
2.	(A) is True but (R) is False.
3.	Both (A) and (R) are False.
4.	Both (A) and (R) are True and (R) correctly explains (A).

93.

Identify the correct statement regarding the sections of the spinal cord shown in the given diagram:

I:	A and D are part of the grey mater
II:	B is motor and C is sensory

1.	Only I	2.	Only II
3.	Both I and II	4.	Neither I nor II

94.

Assertion (A):	Humans cannot develop brain cancer.
Reason (R):	Neurons lack centrioles and are amitotic in nature.

1.	Both (A) and (R) are True but (R) does not correctly explain (A)
2.	(A) is True but (R) is False.
3.	Both (A) and (R) are True and (R) correctly explains (A).
4.	(A) is False but (R) is True.

95.

The part of the sarcomere that is composed of only myosin myofilaments is:

1.	A band	2.	I band
3.	M line	4.	H zone

96. The part of the nephron, that plays a major role in increasing medullary interstitial osmolarity during concentration of urine by human kidney, is:
1. Descending limb of loop of Henle
2. Ascending limb of loop of Henle
3. PCT
4. DCT

97. Identify the correct statement on 'inhibin':

1.	Is produced by granulosa cells in ovary and inhibits the secretion of FSH
2.	Is produced by granulosa cells in ovary and inhibits the secretion of LH
3.	Is produced by nurse cells in testes and inhibits the secretion of LH
4.	Inhibits the secretion of LH, FSH and prolactin.

98. Regulation of gene expression or chromosome function by the interaction of hormone-receptor complex with the genome is the mechanism of action of all the following hormones except:

1.	ACTH	2.	Cortisol
3.	Oestrogen	4.	Thyroxin

99.

Match each item in Column-I [zones of adrenal cortex] with one in Column-II [hormone produced] and select your answer from the codes given:

	Column-I		Column-II
A.	Zona glomerulosa	a.	Aldosterone
B.	Zona fasciculata	b.	Cortisol
C.	Zona reticularis	c.	Adrenal androgens

Codes:

	A	B	C
1.	a	b	c
2.	a	c	b
3.	b	a	c
4.	b	c	a

100. Match each item in Column I with one in Column II and select the correct match from the codes given:

	Column I		Column II
A.	Cholecystokinin	P.	Stimulates the secretion of HCl and pepsinogen by gastric glands
B.	Secretin	Q.	Acts on exocrine pancreas and stimulates the secretion of water and bicarbonate ions
C.	Gastrin	R.	Acts on both exocrine pancreas and gall bladder and stimulates the secretion of pancreatic enzymes and bile juice
D.	Gastric inhibitory peptide	S.	Inhibits gastric secretion and motility and has no effect on exocrine pancreas

Codes:

	A	B	C	D
1.	Q	P	R	S
2.	R	Q	S	P
3.	R	Q	P	S
4.	P	Q	R	S

Fill OMR Sheet*

*If above link doesn't work, please go to test link from where you got the pdf and fill OMR from there

CLICK HERE to get FREE ACCESS for 2 days of ANY NEETprep course

Please be patient as the PDF generation may take upto a minute.

Fill OMR Sheet*