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Cellular Respiration

Description: cellular respiration
Number of Questions: 15
Created by:
Tags: cellular respiration Transport of Oxygen Transport of Gases Respiration in Human Breathing and Exchange of Gases Types of Respiration Structure of Respiratory System Human Respiratory System Anatomy
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Krebs cycle takes place in

  1. chloroplast

  2. ribosome

  3. mitochondria

  4. endoplasmic reticulum

  5. cytosol

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Correct Option: C
Explanation:

Krebs cycle occurs in the mitochondria.

During anaerobic respiration_________.

  1. water and the carbon dioxide are the end products

  2. carbon dioxide and ethyl alcohol are the end products

  3. carbon dioxide and pyruvic acid are the end products

  4. oxygen and water are the end products

  5. only pyruvic acid is formed

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Correct Option: B
Explanation:

Carbon dioxide and the ethyl alcohol are the end products in anaerobic respiration which occurs in the absence of oxygen.

Krebs cycle starts with the formation of a 6 carbon atom by chemical reaction between

  1. malic acid and acetyl coenzyme A

  2. oxaloacetic acid and acetyl coenzyme A

  3. fumaric acid and pyruvic acid

  4. succinic acid and acetyl coenzyme A

  5. succinic acid and fumaric acid

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Correct Option: B
Explanation:

Oxaloacetic acid and acetyl coenzyme A forms 6 C citrate molecule.

Respiration involves _______________.

  1. transformation of potential energy into kinetic energy

  2. breakdown of complex organic substances into simple substances

  3. liberation of energy

  4. all the above are correct

  5. all the above are false

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Correct Option: D
Explanation:

All the above statements are true.

Respiration is considered as a ________.

  1. catabolic process

  2. anabolic process

  3. reduction process

  4. synthetic process

  5. metabolic process

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Correct Option: A
Explanation:

It is a catabolic process as in this, complex organic molecules are broken down into simple ones releasing large amounts of energy.

What is the value of RQ when organic acids are the respiratory materials?

  1. 1

  2. More than 1

  3. Less than 1

  4. Anything can be correct

  5. None of the above

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Correct Option: B
Explanation:

The value of RQ is more than 1, when organic acids are used as respiratory material.

The first important reaction in the process of respiration is_________.

  1. glycolysis

  2. photolysis

  3. krebs cycle

  4. fermentation

  5. break down of pyruvic acid into acetyl coenzyme A

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Correct Option: A
Explanation:

It is the first step in the respiration process, from here the process depends upon the presence or absence of oxygen.

Which of the following is a universal hydrogen acceptor?

  1. NAD

  2. ATP

  3. Coenzyme A

  4. TPP

  5. Lipoic acid

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Correct Option: A
Explanation:

NAD is nicotineamide adenine dinucleotide derivative of vitamin niacin acts as a universal hydrogen acceptor and forms NADH.

Carbon dioxide produced is more than oxygen absorbed when

  1. sucrose is used in respiration.

  2. glucose is used in respiration.

  3. organic acid is used in respiration.

  4. fat is used in respiration.

  5. oil is used in respiration.

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Correct Option: C
Explanation:

When organic acid is used as a respiratory material, then RQ is more than 1 suggesting that carbon dioxide produced is more than oxygen absorbed.

In a ripe banana, rate of respiratory increase is called

  1. climacteric

  2. photorespiration

  3. climax

  4. anthesis

  5. oxidative phosphorylation

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Correct Option: A
Explanation:

The climacteric is a stage of fruit ripening associated with ethylene production and cell respiration rise.

R.Q. in anaerobic respiration is

  1. 0.7

  2. 0.9

  3. Unity

  4. Infinite

  5. More than unity

Show answer
Correct Option: D
Explanation:

In anaerobic respiration R.Q. is infinity.

Which of the following phenomena takes place in mitochondria?

  1. Oxidative phosphorylation.

  2. Photolysis.

  3. Phtophosphorylation.

  4. Glycolysis.

  5. Photorespiration.

Show answer
Correct Option: A
Explanation:

This occurs in mitochondria whereas ATP is produced during aerobic metabolism.

What is being utilized in krebs cycle?

  1. Pyruvic acid

  2. Acetyl coA

  3. Oxaloacetate

  4. Both acetyl coA and oxaloacetate

  5. NAD

Show answer
Correct Option: B
Explanation:

Acetyl coA enters the krebs cycle and reacts with oxaloacetate to form citrate.

Respiratory quotient

  1. varies according to the respiratory material

  2. is not variable

  3. same for all substances

  4. varies according to the color of respirable materials

  5. all the above are correct

Show answer
Correct Option: A
Explanation:

It is true that RQ varies with the respiratory material like proteins, carbohydrates, fats, organic acids etc.

RQ is represented as

  1. oxygen / carbon dioxide

  2. Carbon dioxide / oxygen

  3. Oxygen taken in

  4. P1V1 = P2V2

  5. Carbon dioxide evolved

Show answer
Correct Option: B
Explanation:

RQ is the ratio of carbon dioxide evolved to oxygen consumed in respiration.

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