Custom Practice Test

Biology-I-Section-A

1. Phylogenetic classification systems are based on:

1.	all observable characteristics.
2.	cytological information like chromosome number, structure, behaviour.
3.	evolutionary relationships between the various organisms.
4.	natural affinities among the organisms and consider, not only the external features, but also internal features, like ultra-structure, anatomy, embryology and phytochemistry.

2.

The cell walls of diatoms are ‘indestructible’ as they are embedded with:

1.	Silica	2.	Chitin
3.	Calcium	4.	Raphides

3.

Gonyaulax is:

1.	a heterotrophic bacteria pathogenic to cereal crops
2.	a dinoflagellate responsible for red tides
3.	a free living nematode
4.	a thermophilic archaebacterium

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

	Group of protozoans		Example
A.	Amoeboid	P.	Entamoeba
B.	Flagellated	Q.	Paramecium
C.	Ciliated	R.	Trypanosoma
D.	Sporozoan	S.	Plasmodium

Codes:

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

5. What characters will be similar in members of Kingdom Fungi and Kingdom Animalia as per Whittaker’s Five Kingdom Classification?
a. Cell type
b. Cell wall
c. Body organisation

1.	Only a	2.	Only b and c
3.	Only a and c	4.	Only c

6. A spherical bacterium is called as:
1. Coccus
2. Bacillus
3. Vibrios
4. Spirochaete

7. You discover a unicellular organism. You shall place this organism in Kingdom Monera and not in Kingdom Protista if the cell:

I:	has non-cellulosic cell wall composed of polysaccharide and amino acids
II:	has a nuclear membrane but it is not double layered

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

8. Given below are two statements:

Assertion (A):	In basidiomycetes, basidiospores are produced endogenously in the basidium
Reason (R):	In ascomycetes, ascospores are produced exogenously in ascus

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.

9. Identify the statements which will be incorrect regarding viruses:

I:	Viruses possess their own metabolic system
II:	All viruses contain RNA and DNA
III:	Viruses are obligate parasites
IV:	Nucleic acid of virus is known as capsid

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

10. Identify the incorrect statement regarding members of phycomycetes:

1.	They are found in aquatic habitats and on decaying wood in moist and damp places or as obligate parasites on plants.
2.	The mycelium is septate and coenocytic.
3.	Asexual reproduction takes place by zoospores (motile) or by aplanospores (non-motile).
4.	A zygospore is formed by fusion of two gametes.

11.

Select the correct combination of the statements (a-d) regarding the characteristics of certain organisms:

(a)	Methanogens are archaebacteria that produce methane in marshy areas
(b)	Nostoc is a filamentous blue-green alga that fixes atmospheric nitrogen
(c)	Chemosynthetic autotrophic bacteria synthesize cellulose from glucose
(d)	Mycoplasma lack a cell wall and can survive without oxygen

The correct statements are:

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

12.

Identify the incorrect statement regarding true bacteria?

1.	As a group, they exhibit maximum metabolic diversity.
2.	Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur.
3.	Heterotrophic bacteria are the most abundant in nature.
4.	Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores.

13. In Whittaker’s five Kingdom classification, organisms with eukaryotic cell type and cellular body organisation are kept under:

1.	Kingdom Monera	2.	Kingdom Protista
3.	Kingdom Fungi	4.	Kingdom Plantae

14. Study the Assertion statement followed by the Reason statement given below:

Assertion(A):	Paramoecium and Amoeba, which were earlier placed in the animal kingdom which lack cell wall, are placed under Kingdom Protista in Whittaker’s Classification.
Reason(R):	The unicellular eukaryotic organisms are placed in Kingdom Protista in Whittaker’s Classification.

1.	(A) is true and (R) is false.
2.	Both (A) and (R) are true and (R) is a correct explanation of (A).
3.	Both (A) and (R) are true but (R) is not a correct explanation of (A).
4.	(A) is false and (R) is true.

15. All the following given differences between fungi belonging to Phycomycetes and Basidiomycetes are correct except:

		Phycomycetes	Basidiomycetes
1.	Mycelium	Branched and septate	Aseptate and coenocytic
2.	Asexual spores	Zoospores or aplanospores	Generally not found
3.	Notable examples	Bread mould and Albugo	Rust and Smut fungi
4.	Dikaryon stage	Not seen	Present

16. The vast majority of bacteria are:
1. Photosynthetic autotrophs
2. Chemosynthetic autotrophs
3. Heterotrophs
4. Methanogens

17. Earlier classification systems included bacteria, blue green algae and fungi under ‘plants’. The problem with this inclusion was:

I:	Bacteria and blue green algae have prokaryotic cell organization unlike other members included in ‘plants’.
II:	Fungi and many bacteria are heterotrophic unlike autotrophic members included in ‘plants’.

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

18. Which of the following fungus does not belong to the Class Ascomycetes?
1. Rhizopus
2. Aspergillus
3. Neurospora
4. Claviceps

19.

Ciliates differ from all other protozoans in?

1.	using flagella for locomotion
2.	having a contractile vacuole for removing excess water
3.	using pseudopodia for capturing prey
4.	having two types of nuclei

20. African sleeping sickness is caused by an infection with:

1.	a dsDNA virus	2.	a gran negative bacterium
3.	a flagellated protozoan	4.	a fungus

21. Study the Assertion statement followed by the Reason statement given below:

Assertion (A):	Lichens are very good pollution indicators.
Reason (R):	They grow profusely in polluted areas.

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

22. Abnormally folded infectious proteins can, in humans, cause:
1. Mad cow disease
2. Scrapie
3. Creutzfeldt-Jacob disease
4. MERS

23. Which of the following is not a basis for the division of the Kingdom Fungi into various classes?
1. Morphology of the mycelium
2. Mode of spore formation
3. Fruiting bodies
4. Chemical constitution of cell wall

24.

The causative agent of mad-cow disease is a:
1. bacterium
2. prion
3. worm
4. virus

25. Find the incorrect statement:

1.	Bacteria mainly divide by binary fission
2.	Under unfavorable conditions, bacteria produce spores
3.	Bacteria can reproduce by a sort of sexual reproduction by adopting a primitive type of DNA transfer from one bacterium to the other
4.	Bacterial cell wall may be cellulosic

26. All the following statements regarding diatoms are true except:

1.	The two overlapping shells of cell wall fit together as in a soap box.
2.	They are the chief ‘producers’ in the oceans.
3.	Their cell walls are embedded with silica.
4.	Diatoms behave like heterotrophs when deprived of sunlight.

27. Which of the following statements is not true regarding the mode of reproduction of organisms belonging to different classes of the kingdom fungi?

1.	Large number of members of deuteromycetes are decomposers of litter and help in mineral cycling
2.	Sex organs are absent in basidiomycetes but plasmogamy is brought about by fusion of the nuclei of the gametes
3.	The asexual spores produced by ascomycetes are conidia, produced exogenously on the special mycelium called conidiophores
4.	In ascomycetes and basidiomycetes, an intervening dikaryon stage exists before the fusion of parental nuclei

28.

Consider the given two statements:

I:	Mycoplasma are naturally resistant to antibiotics that target cell wall synthesis
II:	They are the smallest bacteria discovered yet

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. Both I and II are incorrect

29. Generally, the shape not seen in a bacterial cell is:
1. Rod like
2. Comma shaped
3. Spherical
4. Icosahedral

30.

The most abundant prokaryotes helpful to human in making curd from milk and in production of antibiotics are the ones categorized as:
1. Cyanobacteria
2. Archaebacteria
3. Chemosynthetic autotrophs
4. Heterotrophic bacteria

31. Identify the incorrect statement regarding cyanobacteria:

1.	They have chlorophyll a (similar to green plants)
2.	They are unicellular and never colonial or filamentous
3.	They often form blooms in polluted water bodies
4.	Some of them can fix atmospheric nitrogen

32. All the following will be true for Lichens except:

1.	They are placed in Monera in Whittaker’s classification.
2.	They are good indicators of environmental pollution.
3.	They are symbiotic associations i.e. mutually useful associations, between algae and fungi.
4.	They play an important role in primary ecological succession on the rocks.

33.

In the five kingdom classification, the members of Kingdom Animalia:

I:	are all heterotrophs
II:	are all multicellular where cells lack a cell wall

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

34. A unicellular organism shows:

I:	Eukaryotic cell type
II:	Absent cell wall
III:	Capability to act as a heterotroph when deprived of sunlight

This organism must be classified under:

1.	Kingdom Monera, as a mycoplasma
2.	Kingdom Protista, as a euglenoid
3.	Kingdom Protista, as a dinoflagellate
4.	Kingdom Animalia, as a sponge

35.

Which of the following are found in extreme saline conditions?
1. Archaebacteria
2. Eubacteria
3. Cyanobacteria
4. Mycobacteria

Biology-I-Section-B

36. 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	Phycomycetes	P	Ustilago and Puccinia
B	Ascomycetes	Q	Alternaria and Trichoderma
C	Basidiomycetes	R	Rhizopus and Albugo
D	Deuteromycetes	S	Aspergillus and Neurospora

Codes:

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

37. Identify the correct statement:

1.	No known member of Kingdom Fungi is unicellular
2.	No known member of Kingdom Fungi has polysaccharide in cell wall of its cells
3.	No known member of Kingdom Fungi has chlorophyll pigment in its cells
4.	No known member of Kingdom Fungi is capable of living as a symbiont

38. Bacteria reproduce mainly by:
1. fission
2. producing spores
3. a primitive type of DNA transfer
4. sexual method

39. After karyogamy followed by meiosis, spores are produced endogenously in:
1. Neurospora
2. Alternaria
3. Agaricus
4. Colletotrichum

40.

Match the class of fungi in Column I with representative examples in Column II and select the correct option:

	Column I		Column II
A.	Phycomycetes	P.	Morels and truffles
B.	Ascomycetes	Q.	Alternaria, Trichoderma
C.	Basidiomycetes	R.	Bread mould and Albugo
D.	Deuteromycetes	S.	Smut and rust fungi

Codes:

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

41. In the given diagram showing filamentous Nostoc, the structure marked as A:

1.	is a resting spore
2.	is involved in nitrogen fixation
3.	is gas vacuole
4.	is where carbon dioxide concentration mechanism is applied

42. Small single-stranded, circular RNAs not surrounded by a protein coating, that are infectious pathogens, are:
1. Virus
2. Virion
3. Viroid
4. Prion

43.

Viruses are no more "alive" than isolated chromosomes because:

1.	They require both RNA and DNA
2.	They both need food molecules
3.	They both require oxygen for respiration
4.	Both require the environment of a cell to replicate

44. Regarding the bacteria shown in the given figure:

I:	A is a bacillus and an example is a bacterium that adds cyanocobalamin to curd during fermentation.
II:	B is a coccus and an example of bacterium that was used by Griffith in his experiments.

1. I is correct; II is incorrect
2. I is correct; II is correct
3. I is incorrect; II is incorrect
4. I is incorrect; II is correct

45.

Cyanobacteria:

I:	are eubacteria
II:	have chlorophyll a similar to green plants
III:	can fix atmospheric nitrogen

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

46. Which fungus is used extensively in biochemical and genetic work?

1.	Aspergillus	2.	Neurospora
3.	Claviceps	4.	Agaricus

47.

Which one of the following statements is wrong?

1.	Golden algae are also called desmids
2.	Eubacteria are also called false bacteria.
3.	Phycomycetes are also called algal fungi.
4.	Cyanobacteria are also called blue-green algae.

48.

Infectious proteins are present in:
1. geminiviruses
2. prions
3. viroids
4. satellite viruses

49. Read the following statements with respect to natural system of classification:

(i)	It was given by George Bentham and Joseph Dalton Hooker
(ii)	It was based on natural affinities among the organisms
(iii)	It takes into account not only the external features but also internal features
(iv)	Internal features like ultrastructure, anatomy, embryology and phytochemistry are also considered
(v)	Evolution is also taken into account

How many of the above statements are correct?
1. Two
2. Four
3. Three
4. Five

50. An analogous variant of the agent that causes BSE in cattle causes:
1. Potato spindle tuber disease
2. Cr–Jacob disease (CJD) in humans
3. Mosaic formation in plants
4. Leaf rolling and curling in plants

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