Respiration in Plants Test

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Respiration in Plants Test - 60

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Weekly Quiz Competition

Question 1
1 / -0

RQ is more than one indicating

A
Aerobic respiration.

B
Anaerobic respiration.

C
Both A and B.

D
None of the above.

Solution

If RQ value is more than 1, the respiration would be aerobic and anaerobic respiration.
So the correct option is 'Aerobic respiration and Anaerobic respiration'.
Question 2
1 / -0

Number of oxygen molecules required during glycolysis of one glucose molecule is

A
38

B
36

C
2

D
Zero

Solution

Glycolysis of one glucose molecule produces two molecules of pyruvic acid as the end product. However, during each oxidative step, no molecular oxygen is required as such. Oxidation occurs by removal of hydrogen and not addition of oxygen.
So the answer is 'Zero'.
Question 3
1 / -0

An enzyme absent in mitochondrial ETS is

A
FeS protease

B
Glucose 6-phosphate dehydrogenase

C
NADH dehydrogenase

D
Cytochrome c-oxidase

Solution

ETS in mitochondria is the final stage of cellular respiration in which each oxidative step involves release of a pair of hydrogen atoms which dissociates into 2H+ and 2e-. ETS is composed of cytochromes, coenzymes and other enzymes. Glucose 6-phosphate dehydrogenase is not present in ETS. It is involved in pentose phosphate pathway in which glucose 6-phosphate is a substrate. FeS protease, NADH dehydrogenase and cytochrome c-oxidase are found in ETS.
So the answer is 'Glucose 6-phosphate dehydrogenase'.
Question 4
1 / -0

Mechanism of aerobic respiration / tricarboxylic acid pathway was discovered by

A
Calvin.

B
Krebs.

C
Pasteur.

D
Hatch and Slack.

Solution

The tricarboxylic acid pathway is also called as the Citric acid cycle is discovered by British biochemist Sir Hans Krebs.
So the correct option is 'Krebs.'
Question 5
1 / -0

Respiratory quotient (R.Q.) is

A
Volume of O$$_2$$ evolved / Volume of CO$$_2$$ consumed

B
Volume of CO$$_2$$ evolved / Volume of O$$_2$$ consumed

C
Volume of O$$_2$$ consumed / Volume of CO$$_2$$ evolved

D
Volume of CO$$_2$$ consumed / Volume of O$$_2$$ evolved

Solution

Respiratory quotient or R.Q. is the ratio of volume of CO$$_2$$ produced to volume of O$$_2$$ consumed during cellular respiration. It is measured by Ganong's Respirometer. R.Q. for carbohydrates is 1, organic acid is >1 and fats and proteins is <1.
So, the correct answer is 'Volume of CO$$_2$$ evolved / Volume of O$$_2$$ consumed'.
Question 6
1 / -0

Alcoholic fermentation occurs in the presence of

A
Zymase.

B
Amylase.

C
Invertase.

D
Maltase.

Solution

The fermentation process is catalyzed by enzyme Zymase which converts sugar to ethanol and carbon dioxide.
So the correct option is 'Zymase.'
Question 7
1 / -0

A single turn of citric acid cycle yields _________________.

A
$$2 FADH_2, 2NADH_2, 2 GTP$$

B
$$1 FADH_2, 2NADH_2, 1 GTP$$

C
$$1 FADH_2, 3NADH_2, 1 GTP$$

D
$$FADH_2, 4NADH_2, 1 GTP$$

E
$$1 FADH_2, 1NADH_2, 2 GTP$$
Question 8
1 / -0

R.Q. of anaerobic respiration is

A
Zero

B
Less than 1

C
1

D
More than 1

Solution

The utilization of oxygen is nill in anaerobic respiration. Hence the R.Q. value is infinity.
So the correct option is 'More than 1.'
Question 9
1 / -0

Pasteur effect is __________________.

A
Stoppage of fermentation in presence of oxygen

B
Increase of fermentation in presence of oxygen

C
Decrease in fermentation in presence of oxygen

D
No effect on fermentation
Question 10
1 / -0

How many ATP is utilized in the preparatory phase of glycolysis?

A
7

B
4

C
2

D
5

Solution

Glycolysis is a metabolic process in which one glucose molecule is converted into 2 puruvate molecules under aerobic condition. During the formation of 3-phosphoglyceric acid and pyruvic acids 2 ATP molecules are formed respectively. However, 2 molecules of ATP are utilized during conversion of glucose to glucose-6-phosphate and fructose-6-phosphate to fructose-1,6-biphosphate. Hence, the end products of glycolysis are 2 ATP molecules, 2 pyruvic acid molecules and 2 NADH molecules.
Thus, the correct answer is '2.'

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Respiration in Plants Test - 60

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Respiration in Plants Test - 60

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Question 1

Aerobic respiration.

Anaerobic respiration.

Both A and B.

None of the above.

Solution

Question 2

38

36

2

Zero

Solution

Question 3

FeS protease

Glucose 6-phosphate dehydrogenase

NADH dehydrogenase

Cytochrome c-oxidase

Solution

Question 4

Calvin.

Krebs.

Pasteur.

Hatch and Slack.

Solution

Question 5

Volume of O$$_2$$ evolved / Volume of CO$$_2$$ consumed

Volume of CO$$_2$$ evolved / Volume of O$$_2$$ consumed

Volume of O$$_2$$ consumed / Volume of CO$$_2$$ evolved

Volume of CO$$_2$$ consumed / Volume of O$$_2$$ evolved

Solution

Question 6

Zymase.

Amylase.

Invertase.

Maltase.

Solution

Question 7

$$2 FADH_2, 2NADH_2, 2 GTP$$

$$1 FADH_2, 2NADH_2, 1 GTP$$

$$1 FADH_2, 3NADH_2, 1 GTP$$

$$FADH_2, 4NADH_2, 1 GTP$$

$$1 FADH_2, 1NADH_2, 2 GTP$$

Question 8

Zero

Less than 1

1

More than 1

Solution

Question 9

Stoppage of fermentation in presence of oxygen

Increase of fermentation in presence of oxygen

Decrease in fermentation in presence of oxygen

No effect on fermentation

Question 10

7

4

2

5

Solution

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