Tag: cellular respiration

Questions Related to cellular respiration

Energy releasing process in which substrate is oxidised without an external electron acceptor is

parts of respiration cellular respiration the respiratory system breathing for energy biology types of respiration

  1. Aerobic respiration.

  2. Fermentation.

  3. Photorespiration.

  4. Glycolysis.

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Correct Option: D
Explanation:

During glycolysis process the substrate pyruvic acid is formed from glucose is then oxidized into lactic acid in muscles by pyruvic acid, decarboxylase and alcohol dehydrogenase.

So the correct option is 'Glycolysis.'

Which of the following is incorrect for glycolysis?

parts of respiration cellular respiration the respiratory system breathing for energy biology types of respiration

  1. It produces ATP

  2. It uses ATP

  3. End products are CO$ _2$ and H$ _2$O

  4. None of the above.

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Correct Option: C
Explanation:

During the process of glycolysis, ATP is utilized and produced but the carbon dioxide and water are not the end products.

So the correct option is 'End products are CO$ _2$ and H$ _2$O.'

NADH is produced in

parts of respiration cellular respiration the respiratory system breathing for energy biology types of respiration

  1. Photosystem II

  2. Photosystem I

  3. Glycolysis

  4. Both A and B

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Correct Option: C
Explanation:

NADH is essentially produced only during the cellular respiration and it gets oxidised to release energy in the form of ATP. Glycolysis is a part of cellular respiration and leads to production of NADH. However, photosystem I and II produce NADPH rather than NADH as energy carriers. So the answer is 'Glycolysis'.

Which group of scientists discovered glycolysis?

parts of respiration cellular respiration the respiratory system breathing for energy biology types of respiration

  1. Embden, Merrison and Pitches

  2. Embden, Meyerhof and Parnas

  3. Emerson, Hoffman and Peterson

  4. Avery, Macleod and Mc Carthy

Show answer
Correct Option: B
Explanation:

Glycolysis takes place in the liquid part of the cytoplasm i.e. cytosol. The most common type of glycolysis is the Embden–Meyerhof–Parnas (EMP pathway), which was discovered by Gustav Embden, Otto Meyerhof, and Jakub Karol Parnas. 

So the correct option is 'Embden, Meyerhof and Parnas.'

What occurs in glycolysis?

parts of respiration cellular respiration the respiratory system breathing for energy biology types of respiration

  1. Fixation.

  2. Reduction.

  3. Dehydrogenation.

  4. Oxidation.

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Correct Option: D
Explanation:

Glycolysis takes place in the cytosol of cytoplasm without the involvement of oxygen. The by-product of glycolysis is pyruvate which entered into mitochondria and oxidized oxygen to carbon dioxide.

So the correct option is 'Oxidation.'

In glycolysis, enzyme enolase produces

parts of respiration cellular respiration the respiratory system breathing for energy biology types of respiration

  1. Phosphoglyceric acid

  2. Phosphoenol pyruvate

  3. Phosphoglyceraldehyde

  4. Pyruvate

Show answer
Correct Option: B
Explanation:

In glycolysis, the respiratory substrate glucose is oxidised to pyruvic acid to release energy. The enzyme enolase converts phosphoglycerate to phosphoenol pyruvate with the release of H$ _2$O. So, the correct answer is 'Phosphoenol pyruvate'.

Glycolysis is part of

parts of respiration cellular respiration the respiratory system breathing for energy biology types of respiration

  1. Only anaerobic respiration

  2. Krebs cycle

  3. Only aerobic respiration

  4. Both aerobic and anaerobic respiration.

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Correct Option: D
Explanation:

There is no utilization oxygen is seen in the process of glycolysis which takes place in the cytoplasm and it is an anaerobic process. After finishing the glycolysis the cell needs to respirate through aerobic respiration in the presence of oxygen. Aerobic reactions occur in the mitochondria which require oxygen.

So the correct option is 'Both aerobic and anaerobic respiration'.

Anaerobic respiration takes place in
biology breathing for energy parts of respiration cellular respiration types of respiration

  1. mitochondrion

  2. nucleus

  3. cytoplasm

  4. vacuole

Show answer
Correct Option: C
Explanation:
Anaerobic respiration (both glycolysis and fermentation) takes place in the fluid portion of the cytoplasm whereas the bulk of the energy yield of aerobic respiration takes place in the mitochondria. So, the correct answer is "Cytoplasm."