MCQ Questions for Class 11 Biology: Ch 14 Respiration in Plants

MCQ Questions for Class 11 Biology: Ch 14 Respiration in Plants

1. End-product of citric acid/Krebs cycle is​

(a) Citric acid

(b) CO₂ + H₂O

(c) Lactic acid

(d) Pyruvic acid

► (b) CO₂ + H₂O

2. Out of 38 ATP molecules produced per glucose, 32 ATP molecules are formed from NADH/FADH2 in:

(a) respiratory chain

(b) Krebs cycle

(c) oxidative decarboxylation

(d) EMP

► (a) respiratory chain

3. Which of the following is not correct about the Krebs cycle?

(a) It starts with a six-carbon compound.

(b) It occurs in mitochondria.

(c) It is also called the citric acid cycle.

(d) The intermediate compound which links glycolysis with the Krebs cycle is malic acid.

► (d) The intermediate compound which links glycolysis with the Krebs cycle is malic acid.

4. The following is required both by the process of respiration and photosynthesis

(a) Carbohydrates

(b) Sunlight

(c) Chlorophyll

(d) Cytochromes

► (d) Cytochromes

5. The term ‘Glycolysis’ has originated from the Greek words

(a) Glucose and lysis

(b) Glyco and lysis

(c) Glycose and lysis

(d) Glykos and lysis

► (d) Glykos and lysis

6. Common immediate source of energy in cellular activity is

(a) glucose

(b) aldohexose

(c) ATP

(d) NAD

► (c) ATP

7. Complete oxidation of 1 gm mol of glucose gives rise to

(a) 6860000 cals

(b) 686000 cals.

(c) 68600 cals.

(d) 6860 cals.

► (b) 686000 cals.

8. Cytochromes are concerned with

(a) Protein synthesis

(b) Cellular digestion

(c) Cell division

(d) Cell-respiration

► (d) Cell-respiration

9. The net gain of ATP during glycolysis is

(a) 4

(b) 8

(c) 2

(d) 6

► (b) 8

10. Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as

(a) TCA-pathway

(b) Glycolysis

(c) HMS-pathway

(d) Krebs cycle

► (b) Glycolysis

11. Oxidative phosphorylation is production of

(a) ATP in photosynthesis

(b) NADPH in photosynthesis

(c) ATP in respiration

(d) NADH in respiration
► (c) ATP in respiration

12. Glycolysis is conversion of

(a) Glucose to citric acid

(b) Glucose to fructose

(c) Glucose to pyruvic acid

(d) Glucose to malic acid

► (c) Glucose to pyruvic acid

13. Energy obtained by a cell from catabolic reaction is stored immediately in the form of

(a) Glucose

(b) Pyruvic acid

(c) ADP

(d) ATP
► (d) ATP

14. Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle pyruvate is changed to:

(a) oxaloacetate

(b) PEP

(c) pyruvate

(d) acetyl CoA

► (d) acetyl CoA

15. Most of the enzymes of the TCA cycle are present in

(a) Intermembrane space of mitochondria

(b) Mitochondrial matrix

(c) Inner membrane of mitochondria

(d) Cytoplasm

► (b) Mitochondrial matrix

16. End product of glycolysis is:

(a) acetyl CoA

(b) pyruvic Acid

(c) glucose 1-phosphate

(d) fructose 1-phosphate

► (b) pyruvic Acid

17. The TCA cycle is named after

(a) Robert Emerson

(b) Melvin Calvin

(c) Embden

(d) Hans Krebs

► (d) Hans Krebs

18. In anaerobic respiration seeds respire

(a) In presence of O₂

(b) In presence of CO₂

(c) In absence of O₂

(d) In absence of CO₂

► (c) In absence of O₂

19. Number of oxygen atoms required for aerobic oxidation of one pyruvate –
(a) 10
(b) 8
(c) 5
(d) 12
► (a) 10

20. The net gain of ATP molecules by glycolysis is

(a) Zero

(b) Two

(c) Four

(d) Eight

► (b) Two

21. Acetyl CoA combine with oxalo-acetate in presence of condensing enzyme citrate synthase to form 6-C compound called

(a) Malic acid

(b) Tartaric acid

(c) Pyruvic acid

(d) Citric acid

► (d) Citric acid

22. Out of 36 ATP molecules produced per glucose molecule during respiration:

(a) 2 are produced outside glycolysis and 34 during respiratory chain

(b) 2 are produced outside mitochondria and 34 inside mitochondria

(c) 2 during glycolysis and 34 during Krebs cycle

(d) All are formed inside mitochondria

► (b) 2 are produced outside mitochondria and 34 inside mitochondria

23. ATP is injected in cyanide poisoning because it is:

(a) necessary for cellular functions

(b) necessary for Na+ – K+ pump

(c) Na+ – K+ pump operates at the cell membranes

(d) ATP breaks down cyanide

► (a) necessary for cellular functions

24. The universal hydrogen acceptor is

(a) NAD

(b) ATP

(c) Co-A

(d) FMN

► (a) NAD

25. Most of the energy of the carbohydrates is released by oxidation when

(a) Pyruvic acid is converted into CO₂ and H₂O

(b) Pyruvic acid is converted into acetyl Co-A

(c) Sugar is converted into pyruvic acid

(d) Glucose is converted into alcohol and CO₂

► (a) Pyruvic acid is converted into CO₂ and H₂O

26. Respiratory quotient (R.Q.) for fatty acid is:

(a) > 1

(b) < 1

(c) 1

(d) 0

► (b) < 1

27. Glycolysis takes place in

(a) Cytoplasm

(b) Chloroplast

(c) Ribosome

(d) Mitochondria

► (a) Cytoplasm

28. In which of the following do the two names refer to one and the same thing?

(a) Krebs cycle and Calvin cycle

(b) Citric acid cycle and Calvin cycle

(c) Tricarboxylic acid cycle and citric acid cycle

(d) Tricarboxylic acid cycle and urea cycle

► (c) Tricarboxylic acid cycle and citric acid cycle

29. When one glucose molecule is completely oxidised, it changes:

(a) 36 ADP molecules into 36 ATP molecules

(b) 38 ADP molecules into 38 ATP molecules

(c) 30 ADP molecules into 30 ATP molecules

(d) 32 ADP molecules into 32 ATP molecules

► (b) 38 ADP molecules into 38 ATP molecules

30. The respiratory ratio of protein is

(a) 0.2

(b) 0.9

(c) 1.0

(d) 0.7

► (b) 0.9

31. Maximum amount of energy/ATP is liberated on oxidation of:

(a) fats

(b) proteins

(c) starch

(d) vitamins

► (a) fats

32. Oxidative phosphorylation involves simultaneous oxidation and phosphorylation to finally form:

(a) pyruvate

(b) NADP

(c) DPN

(d) ATP

►(d) ATP