Tag: respiration in plants

Questions Related to respiration in plants

Which of the following forms the connecting link between glycolysis and Kreb's cycle?

  1. Glucose

  2. Ethyl alcohol

  3. Lactic acid

  4. Pyruvic acid


Correct Option: D
Explanation:
Pyruvic acid is produced as a final end product of glycolysis. This pyruvic acid then forms acetyl CoA. This acetyl CoA, acts as initial compound of Kreb's cycle.
So, the correct answer is 'Pyruvic acid'

The details of tricarboxylic acid pathway was worked out by

  1. Miescher

  2. Hans Krebs

  3. Pasteur

  4. None of the above


Correct Option: B
Explanation:

Sir Hans Adolf Krebs was a German born British physician and biochemist. He was the pioneer scientist in study of cellular respiration, a biochemical pathway in cells for production of energy.

Out of 38 molecules of ATP produced after aerobic respiration of glucose, the break up in ATP production in glycolysis (P). pyruvic acid to acetyl CoA formation (Q) and Krebs cycle (R) is 

  1. P = 2, Q = 6, R = 30

  2. P = 8, Q = 6, R = 24

  3. P = 8, Q = 10, R = 20

  4. P = 2, Q = 12, R = 24


Correct Option: B

Aerobic respiratory pathway is appropriate termed ___________.

  1. Anabolic

  2. Catabolic

  3. Amphibolic

  4. Parabolic


Correct Option: C

Which of the two statements together support that respiratory pathway is an amphibolic pathway.
i) Fats breakdown to glycerol and fatty acids, subsequently yields acetyl CoA
ii) In respiration C-C bonds of complex compounds breakdown through oxidation leading to release of energy
iii) Acetyl CoA from respiratory pathway is withdrawn for synthesis of fatty acids
iv) Proteins are degraded by protease to amino acids and enter the respiratory pathway

  1. i, ii

  2. i, iv

  3. ii, iv

  4. ii, iii


Correct Option: D

Largest amount of phosphate bound energy is produced in the process of respiration during 

  1. Anaerobic respiration

  2. Glycolysis

  3. Krebs cycle

  4. None of the above


Correct Option: C
Explanation:

During the process of glycolysis 8 ATP molecules are produced in aerobic respiration. In the case of Krebs cycle 30 ATP molecules can be produced.

The process by which the energy of glucose is released under aerobic respiration was discovered by

  1. Hopkins

  2. Lister

  3. Krebs

  4. Pasteur


Correct Option: C
Explanation:

The process by which the energy of glucose is released under aerobic respiration, was discovered by Hans Krebs. The Krebs cycle is a part of cellular respiration. It is a series of chemical reactions used by all aerobic organisms to generate energy.

Aerobic respiratory pathway is appropriately called as

  1. Anabolic

  2. Catbolic

  3. Amphibolic

  4. Parabolic


Correct Option: C
Explanation:

Aerobic respiratory pathway is appropriately called amphibolic pathway. It contains both catabolic and anabolic reactions. The pathway is catabolic because in this pathway, glucose is broken down into carbon dioxide and water. It is also anabolic pathway as energy rich ATP molecule is produced during this pathway. These ATP molecules are later used to carry out various reaction. 

Thus, the correct answer is option C.

Kerbs cycle __________________.

  1. Liberates a minor part of energy during respiration

  2. Is operative in photorespiration

  3. Reactions are independent of oxygen supply

  4. Is a like between carbohydrate and nitrogen metabolism


Correct Option: A

In Kreb's cycle, OAA accepts acetyl CoA to form 

  1. Citric acid

  2. Oxalosuccinate

  3. Fumarate

  4. Succinyl CoA


Correct Option: A
Explanation:

The citric acid cycle starts with the condensation of acetyl group with oxalo acetic acid and water to yield citric acid. The reaction is catalysed by the enzyme citrate synthase and a molecule of CoA is released.

Image result for citric acid cycle
So the correct option is 'citric acid'.