Respiration In Plants - Live Session

1.

Respiratory substrate for protoplasmic respiration is
(1) Protein
(2) Organic acid
(3) Carbohydrate
(4) Fat

2.

First substrate-level phosphorylation occurs in aerobic respiration at
(1) 1, 3 biphosphoglyceric acid
(2) Phosphoenol pyruvate
(3) $α$ -ketoglutaric acid
(4) Succinyl CoA

3.

Which one is not a 4C intermediate product of Kreb’s cycle?
(1) Oxaloacetic acid
(2) $α$ -ketoglutaric acid
(3) Succinic acid
(4) Malic acid

4.

About ETS which one is not correct?
(1) Present in the inner mitochondrial membrane
(2) Complex I is related to NADH dehydrogenase
(3) Cytochrome bc1 complex is also known as complex III
(4) Complex IV coupled with ATP synthase

5.

See the given diagram. Select the incorrect information about it.

(1) represent peri mitochondrial space
(2) $3 H^{+}$ required for formation of 1 ATP molecule
(3) represents matrix of mitochondria
(4) is non enzymatic site

6.

In which of the following reactions substrate level phosphorylation takes place in Krebs’ cycle?
a. Malic acid $\to$ Oxaloacetic acid
b. PEP $\to$ Pyruvate
c. Succinyl CoA $\to$ Succinic acid
d. 3PGA $\to$ 2PGA
(1) b & c
(2) b & d
(3) b, c & d
(4) Only c

7.

Pyruvate dehydrogenase enzyme activity requires which of the following during oxidative decarboxylation?
(1) Coenzyme-A, $N A D^{+}$ and $M g^{2 +}$
(2) Coenzyme-A, $F A D^{+}$ and $M n^{2 +}$
(3) $N A D^{+}$ and $F e^{+ +}$
(4) Coenzyme-A, $N A D^{+}$ and $Z n^{2 +}$

8.

Arrange the following in ascending order with respect to R.Q values
a. Tripalmitin
b. Proteins
c. Malic acid
d. Glucose
(1) a, b, d & c
(2) b, d, a & c
(3) a, b, c & d
(4) d, a, b & c

9.

The common molecule for fat, protein and carbohydrate oxidation is
(1) Acetyl CoA
(2) Glucose
(3) PGAL
(4) Pyruvate

10.

How many enzymes given below are responsible for the conversion of pyruvic acid into lactic acid?
Pyruvate dehydrogenase, Lactate dehydrogenase, Pyruvate decarboxylase, Hexokinase, Enolase
(1) Two
(2) One
(3) Three
(4) Four

11.

Which of the following complexes couples proton gradient generated during ETS to produce ATP in the cell?
(1) Complex III and IV
(2) Complex II and III
(3) Complex I and II
(4) Complex V

12.

Consider the following statements with respect to respiration
a. Cyt-b is a mobile electron carrier
b. $C O_{2}$ is end product of all types of respiration
c. Five atoms of oxygen are required for complete oxidation of one molecule of pyruvate
d. Conversion of succinate to fumarate produces a reduced coenzyme
(1) a & c are incorrect
(2) Only d is correct
(3) c & d are correct
(4) b & d are correct

13.

Total number of ATP produced through ETS only from one molecule of PGAL in aerobic respiration is
(1) 5
(2) 20
(3) 17
(4) 10

14.

Name of the product marked (A) in the diagram given below

(1) 2-Phosphoglycerate
(2) Pyruvate
(3) Acetaldehyde
(4) Acetyl CoA

15.

Which of the following is the wrong statement with respect to citric acid cycle?
(1) It takes place in the matrix of mitochondria
(2) $α$ -Ketoglutaric acid is formed after transamination
(3) Oxaloacetic acid is the primary acceptor of this cycle
(4) The first stable product is the six-carbon compound

16.

Which of the following step is common to Krebs’ cycle and EMP-pathway?
(1) Oxidative phosphorylation
(2) Decarboxylation
(3) Substrate level phosphorylation
(4) Oxidative decarboxylation

17.

What is common between alcohol and lactic acid fermentation?
(1) EMP pathway
(2) Decarboxylation
(3) Link reaction
(4) Carboxylation

18.

Phosphorylation of glucose in glycolysis is catalyzed by
(1) Hexokinase
(2) Phosphorylase
(3) Phosphoglucomutase
(4) Phosphoglucoisomerase

19.

Match the following and choose the correct option from those given below
Column I Column II
a. $α$ -Ketoglutaric acid (i) Terpenes
b. Oxaloacetic acid (ii) Glutamic acid
c. Succinyl CoA (iii) Pyrimidines
d. Acetyl CoA (iv) Chlorophyll
(1) a(ii), b(iii), c(iv), d(i)
(2) a(ii), b(i), c(iv), d(iii)
(3) a(i), b(ii), c(iii), d(iv)
(4) a(i), b(iii), c(iv), d(ii)

20.

The main splitting enzyme in glycolysis
(1) PFK
(2) Aldolase
(3) Hexokinase
(4) Transphosphorylase

21.

Aerobic respiration completes in
(1) Mitochondrial matrix only
(2) Mitochondrial matrix and inner mitochondrial membrane
(3) Two processes is, one in the cytoplasm and another in the mitochondrial matrix
(4) One process of complete oxidation in mitochondrial membrane

22.

Second decarboxylation in TCA cycle occurs at
(1) Citric acid
(2) Malic acid
(3) $α$ -Ketoglutaric acid
(4) Isocitric acid

23.

Last electron donor in ETC is
(1) $\frac{1}{2} O_{2}$ in mitochondrial matrix
(2) $\frac{1}{2} O_{2}$ associated with inner mitochondrial membrane
(3) Two Cu-centre in complex-IV
(4) Two Cu-centre in mobile protein Cyt-c

24.

How many ATPs are gained from one PEP molecule in its complete oxidation?
(1) 15
(2) 16
(3) 31
(4) 32

25.

Which of the respiratory substrates consumes more $O_{2}$ for oxidation by releasing less $C O_{2}$ ?
(1) OAA
(2) Malic acid
(3) Palmitic acid
(4) Sucrose

26.

Read the following statements with respect to glycolysis
(a) Complete oxidation of pyruvic acid
(b) Occurs in cytoplasm
(c) In anaerobic organisms, it is the only process in respiration
(d) Partial reduction of glucose
(e) Produces ATP and $N A D H + H^{+}$
Mark the correct option
(1) (a), (b) & (e)
(2) (b), (c) & (e)
(3) (a), (c) & (e)
(4) (c), (d) & (e)

27.

Which of the following statement is correct for fermentation?
(1) Occurs only in unicellular eukaryotes
(2) Less than seven percent energy in glucose is released and all is trapped as high energy bonds of ATP
(3) Occurs in mitochondrial matrix
(4) Yeast poison itself to death when alcohol concentration reaches 13%

28.

Identify the given reaction
$P y r u v i c a c i d + C o A + N A D^{+} \to_{P y r u v a t e d e h y d r o g e n a s e}^{M g^{2 +}} A c e t y l C o A + C O_{2} + N A D H + H^{+}$
(1) Oxidative decarboxylation
(2) Oxidative phosphorylation
(3) Dehydrogenation and dehydration
(4) Reductive amination

29.

Read the following statements
(a) Acceptor molecule of the cycle is four carbon-containing organic acid
(b) The first step is a condensation reaction
(c) Involves single step of substrate-level phosphorylation
(d) There are two steps of decarboxylation
These statements are related to :
(1) Glycolysis
(2) Link reaction
(3) TCA cycle
(4) ETS

30.

How many molecules of ATP are produced by substrate-level phosphorylation on complete oxidation of one molecule of pyruvic acid?
(1) Two
(2) One
(3) Four
(4) Three

31.

The mobile carrier for transfer of electrons between complex III and IV is
(1) Ubiquinone
(2) Cytochrome c
(3) Small protein attached to the outer surface of the inner membrane
(4) More than one option is correct

32.

Read the following statements (with respect to electron transport system and oxidative phosphorylation in mitochondria)
(a) $F_{0}$ is an integral membrane protein complex that forms the channel through which protons cross the inner membrane.
(b) The final acceptor of electron and hydrogen in ETS is oxygen.
(c) The $F_{1}$ is base of oxysome and it has site for synthesis of ATP.
(1) (a) & (c) are correct
(2) (a) & (b) are incorrect
(3) (a) & (b) are correct
(4) (b) & (c) are incorrect

33.

When proteins and carbohydrate are used as substrates and are completely oxidized, the RQ is respectively
(1) 0.9, 1
(2) 0.7, 1
(3) Zero, infinite
(4) 0.9, zero

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