Tag: life processes in living organisms- part 1

Questions Related to life processes in living organisms- part 1

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iii) Acetyl CoA from respiratory pathway is withdrawn for synthesis of fatty acids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

biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  1. i, ii

  2. i, iv

  3. ii, iv

  4. ii, iii

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Correct Option: D

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

biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  1. Anaerobic respiration

  2. Glycolysis

  3. Krebs cycle

  4. None of the above

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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

biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  1. Hopkins

  2. Lister

  3. Krebs

  4. Pasteur

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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

biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  1. Anabolic

  2. Catbolic

  3. Amphibolic

  4. Parabolic

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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 __________________.

biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  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

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Correct Option: A

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

biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  1. Citric acid

  2. Oxalosuccinate

  3. Fumarate

  4. Succinyl CoA

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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'.

The site of Krebs cycle is

biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  1. Cytoplasm

  2. Mitochondrial matrix

  3. Intermembrane space of mitochondria

  4. Racker's particles

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Correct Option: B

In Kreb's cycle formation of ___________________.

biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  1. $34$ ATP takes place

  2. $38$ ATP takes place

  3. $15$ ATP from each acetyl Co-A takes place

  4. $12$ ATP from each acetyl Co-A takes place $(24\ ATP)$

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Correct Option: A

How many oxidation step take place during glycolysis, link reaction and Kreb's cycle.

biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  1. $1, 1 and 1$

  2. $1, 1 and 4$

  3. $1, 1 and 3$

  4. $1, 1 and 8$

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Correct Option: B
Respiratory Pathway is _______.
biology respiration in plants amphibolic pathway living organisms and energy production life processes in living organisms- part 1

  1. Catabolic

  2. Amphibolic

  3. Anabolic

  4. Endergonic

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Correct Option: B
Explanation:

The same respiratory process which acts as a catabolic pathway for respiratory substrates also acts as an anabolic pathway for the synthesis of various intermediary metabolic products and secondary metabolites. The respiratory pathway, therefore, acts both as catabolic as well as an anabolic pathway. Thus, it is better to call it the amphibolic pathway rather than a catabolic pathway alone.

So the correct option is B.