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Respiration in Plants (Class - XI)

Respiration in Plants

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Respiratory substrates are the compounds that are oxidised during respiration. Which of the following are not respiratory substrates?

  1. Vitamins
  2. Carbohydrates
  3. Proteins
  4. Fats
  5. Organic acids
Question 2 Multiple Choice (Single Answer)

In which of the following parts of eukaryotes does the breakdown of complex molecules to yield energy take place?

a. Chloroplast
b. Cytoplasm
c. Mitochondria

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 3 Multiple Choice (Single Answer)

Which of the following parts are used by plants for their gaseous exchange?

a. Stomata
b. Lenticels
c. Root nodules

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 4 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. Cyanobacteria and green plants can prepare their own food.
b. The energy produced by plants is stored in the bonds of carbohydrates like glucose, sucrose and starch.
c. In green plants, all cells, tissues and organs photosynthesise.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 5 Multiple Choice (Single Answer)

Which of the following is utilised during the process of respiration in plants?

  1. Carbon dioxide
  2. Water
  3. Energy
  4. Oxygen
  5. None of these
Question 6 Multiple Choice (Single Answer)

Glucose and fructose are phosphorylated by an enzyme hexokinase to give rise to which of the following?

  1. Fructose-6-phosphate
  2. Fructose1, 6-bisphosphate
  3. Triose bisphosphate
  4. Triose phosphate
  5. Glucose-6-phosphate
Question 7 Multiple Choice (Single Answer)

Which of the following assumptions is/are made to make calculations of the net gain of ATP for every glucose molecule oxidised?

  1. Only glucose is being respired
  2. No other intermediate in the pathway is utilised to synthesise any other compound.
  3. The NADH synthesised in glycolysis is transferred into the mitochondria.
  4. A sequential orderly pathway is functioning.
  5. All of the above
Question 8 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. In anaerobic organisms, glycosis is the only process in respiration.
b. Glucose undergoes partial oxidation in glycosis to form two molecules of pyruvic acid.
c. Sucrose is converted into glucose and fructose by the enzyme hexokinase.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 9 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. In eukaryotes, aerobic respiration takes place within the cytoplasm.
b. In many prokaryotes, fermentation takes place under anaerobic conditions.
c. The metabolic pathway through which the electron passes from one carrier to another is called the electron transport system.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 10 Multiple Choice (Single Answer)

Which of the following substrates would need to be broken down into glycerol and fatty acids first before entering the respiratory pathway?

a. Carbohydrates
b. Fats
c. Proteins

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 11 Multiple Choice (Single Answer)

Which of the following is not a characteristic property of aerobic respiration?

  1. In aerobic respiration, there is a complete oxidation of pyruvate.
  2. In aerobic respiration, two molecules of NADH are produced from the metabolism of two molecules of pyruvic acid.
  3. NADH is oxidised to NAD+ very slowly in aerobic respiration.
  4. Glucose is completely degraded to CO2 and H2O in aerobic respiration.
  5. In aerobic respiration, many molecules of ATP are generated.
Question 12 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. The respiratory quotient depends upon the type of respiratory substrate used during respiration.
b. In oxidative phosphorylation, O2 is the ultimate acceptor of electrons and it gets reduced to water.
c. The ratio of volume of CO2 consumed to the volume of O2 evolved in respiration is called as respiratory quotient.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 13 Multiple Choice (Single Answer)

For entry into Krebs cycle, pyruvate formed during glycolysis is converted into

  1. acetyl CoA
  2. glucose
  3. glyceraldehyde phosphate
  4. lactic acid
  5. glycerol
Question 14 Multiple Choice (Single Answer)

In which of the following is less than seven percent of the energy in glucose released?

a. Aerobic respiration
b. Lactic acid fermentation
c. Alcohol fermentation

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 15 Multiple Choice (Single Answer)

The breakdown of glucose to pyruvic acid is called glycolysis. It occurs in the __________ of a cell.

  1. cytoplasm
  2. nucleus
  3. ribosome
  4. mitochondria
  5. vacuole
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