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Respiration in Plants

Description: All about plant respiration.
Number of Questions: 15
Created by:
Tags: Glycolysis Fermentation Aerobic respiration Amphibolic path way Aerobic Respiration in Plants Anaerobic Respiration in Plants Factors Influencing Respiration Respiration in Plants Interrelationship in Metabolic Pathways during Respiration Anaerobic Respiration Respiratory Quotient
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Which of the following statements is true regarding the photosynthesis in plants?

  1. All plants prepare their food by photosynthesis.

  2. Cells containing chloroplast carry out photosynthesis.

  3. In a green plant, all the organs, tissues and cells prepare their own food.

  4. Cynobacteria do not carry out photosynthesis.

  5. The end product of photosynthesis is glucose.

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer. In green plants, not all the cells, tissues and organs carry out photosynthesis, but only the cells containing chloroplasts that are most often located in the superficial layers, carry out photosynthesis.

During oxidation, energy is released by food materials

(a) directly into the cell (b) in one step (c) controlled by enzymes (d) stored as ATP (e) in series of slow steps

  1. Only (a) and (b)

  2. Only (a), (c) and (d)

  3. Only (c), (d) and (e)

  4. Only (d) and (e)

  5. Only (b) and (e)

Show answer
Correct Option: C
Explanation:

Yes, it is correct as during oxidation, energy is released from food materials directly into the cells and  it is released in a series of slow step-wise reactions controlled by enzymes.

In which of the following reactions during glycolsis is ATP used?

(a) Conversion of glucose to glucose 6-phosphate (b) Conversion of BPGA to 3-phosphoglyceric acid (c) Conversion of fructose 6-phosphate to fructose 1, 6-bisphosphate (d) Conversion of PEP to pyruvic acid

  1. Only (a) and (c)

  2. Only (b) and (d)

  3. Only (a) and (d)

  4. Only (b) and (c)

  5. Only (c) and (d)

Show answer
Correct Option: A
Explanation:

Yes, it is correct as in both the reactions, ATP is utilised.

Which of the following are the products of anaerobic respiration?

(a) CO2 (b) 36 ATPs (c) Lactic acid (d) H2O (e) Ethyl alcohol

  1. Only (a) and (d)

  2. Only (a), (b) and (d)

  3. Only (c) and (e)

  4. Only (a), (c) and (e)

Show answer
Correct Option: D
Explanation:

Yes, it is correct. In anaerobic respiration, the products are ethyl alcohol, lactic acid, CO2 and 2 ATPs.

Release of energy during respiration in plants comes from the oxidation of

  1. proteins

  2. glucose

  3. fats

  4. All of the above

Show answer
Correct Option: D
Explanation:

Yes, it is correct as all of the given options are correct. The breakdown of food materials within the cells releases energy during respiration.

Which of the following is/are the carrier(s) of electrons in ETS (Electron Transport System)?

  1. Mitochondria

  2. Cytochromes and coenzymes

  3. NADH2

  4. FADH2

  5. ATPs

Show answer
Correct Option: B
Explanation:

Yes, it is correct. In ETS, in the cristae of the mitochondria, cytochromes and coenzymes exist, which accept high-energy electrons and pass the electrons to the next molecule in the system.

Respiratory pathway is an amphibolic pathway. Which of the following options explain(s) it correctly?

  1. Both inhalation and exhalation are involved.

  2. Both aerobic and anaerobic respiration are involved.

  3. Both anabolic and catabolic processes are involved.

  4. Both oxygen and carbon dioxide are involved.

  5. All of the above

Show answer
Correct Option: C
Explanation:

Yes, it is the correct answer. Amphibolic pathway means a biochemical pathway that involves both catabolism and anabolism.

In which of the following is respiratory substrate completely oxidised?

  1. Yeast

  2. Bacteria

  3. Muscle cells

  4. Intestinal worms

  5. Plant cell

Show answer
Correct Option: E
Explanation:

Yes, it is correct. In a plant cell, aerobic respiration takes place. The respiratory substrate is completely oxidised. The cytoplasm and mitochondria are the sites of breakdown.

Match the following:

     
1 Lenticel a Lactic acid fermentation
2 Mitochondria b Lactic acid formation
3 Cytoplasm c Respiration
4 Muscle cell d ETS

  1. 1 - c, 2 - d, 3 - b, 4 - a

  2. 1 - c, 2 - d, 3 - a, 4 - b

  3. 1 - d, 2 - c, 3 - a, 4 - b

  4. 1 - b, 2 - d, 3 - a, 4 - c

  5. 1 - c, 2 - a, 3 - d, 4 - b

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer. Lenticel - Respiration Mitochondria - ETS Cytoplasm - Lactic acid fermentation Muscle cell - Lactic acid formation

Which of the following is correct regarding the values of respiratory quotient (RQ) in

(a) carbohydrates (b) proteins (c) fats (d) organic acid?

  1. d > a > b > c

  2. a > c > d > b

  3. d > b > a > c

  4. c > a > b > d

  5. c > d > a > b

Show answer
Correct Option: A
Explanation:

The correct order is d > a > b > c.

Plants can get along well without any respiratory organs as

  1. each plant part takes care of its own gas-exchange needs

  2. living cells in a plant are superficial

  3. photosynthesis provides them energy

  4. Both (1) and (2)

  5. All (1), (2) and (3)

Show answer
Correct Option: D
Explanation:

Yes, it is correct as both the options are true regarding respiration without any specialised respiratory organs.

Why is the value of RQ infinity in case of anaerobic respiration?

  1. Because CO2 is not evolved, but O2 is consumed

  2. Because CO2 is evolved, but O2 is not consumed

  3. Because large amount of CO2 is evolved and large amount of O2 is consumed

  4. Because neither CO2 is evolved nor O2 is consumed

  5. None of these

Show answer
Correct Option: B
Explanation:

Yes, it is correct as here, CO2 is evolved, but O2 is not consumed. RQ = 2CO2              0O2 RQ = infinity

Which of the following pairs of enzymes is involved in yeast fermentation?

  1. Lactate dehydrogenase and pyruvic acid decarboxylase

  2. Alcohol dehydrogenase and lactate dehydrogenase

  3. Pyruvic acid decarboxylase and alcohol dehydrogenase

  4. Lactate decarboxylase and pyruvic acid dehydrogenase

  5. None of these

Show answer
Correct Option: C
Explanation:

Yes, it is correct. 

The key product produced in glycolysis is handled by different cells in which of the following ways?

  1. By lactic acid fermentation

  2. By alcoholic fermentation

  3. By aerobic respiration

  4. All of the above

Show answer
Correct Option: D
Explanation:

Yes, it is correct. There are three major ways in which different cells handle pyruvic acid produced by glycolysis. These are lactic acid fermentation, alcoholic fermentation and aerobic respiration.

Which of the following processes occur(s) in mitochondria?

(a) Citric acid cycle (b) Glycolysis (c) ETS (d) Formation of lactic acid

  1. Only (b)

  2. Only (a)

  3. Only (a) and (c)

  4. Only (b) and (d)

  5. All of the above

Show answer
Correct Option: C
Explanation:

Yes, it is the correct answer. In aerobic respiration, glycolysis is followed by citric acid cycle and ETS, which occur in the mitochondria.

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