Biology Class 11th Chapter 14 mcqs

1. Angiosperm pollen is generally released at the

(a) 1 – celled stage

(b) 2 – celled stage

(c) 3 – celled stage

(d) male gamete formation stage

Answer: (b) 2 – celled stage

2. The complete oxidation of pyruvate take place in

(a) cell cytoplasm

(b) inner mitochondrial membrane

(c) mitochondrial matrix

(d) nucleus

Answer: (c) mitochondrial matrix

3. Which enzyme catalyses the reaction below? Pyruvic acid → Carbon dioxide + Ethanol

(a) Pyruvic acid decarboxylase

(b) Alcohol dehydrogenase

(c) None of these

(d) Both of these

Answer: (d) Both of these

4. TCA cycle was discovered by

(a) Otto Meyerhof

(b) Hans Kreb

(c) Gustav Embden

(d) All of these

Answer: (b) Hans Kreb

5. Which one of the following describes the spikelet of a cereal or grass plant

(a) inferior ovary

(b) dehiscent fruit

(c) pair of glumes

(d) fused calyx

Answer: (c) pair of glumes

6. Malacophily means

(a) pollination by wind

(b) pollination by water

(c) pollination by insects

(d) pollination by snails

Answer: (d) pollination by snails

7. Herkogamy is a contrivance for

(a) allogamy

(b) autogamy

(c) chasmogamy

(d) cleistogamy

Answer: (a) allogamy

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

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

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

(c) all the formed inside mitochondria

(d) 2 during glycolysis and 34 during kreds cycle

Answer: (b) 2 are produced outside mitochondria and 34 inside the mitochondria

9. The significant morphological feature of passion flower is the presence of

(a) numerous corolla

(b) androphore

(c) gynophore

(d) androgynophore

Answer: (b) androphore

10. The final electron acceptor in electron transport chain is

(a) Cytochrome C

(b) FADH

(c) NADH

(d) oxygen

Answer: (d) oxygen

11. Which of the following acts as mobile carrier for transfer of electrons between complex III and complex IV?

(a) Cytochrome c

(b) cytochrome a3

(c) cytochrome a

(d) FADH₂

Answer: (a) Cytochrome c

12. Aleurone layer takes part in

(a) protection of delicate embryo

(b) enzyme synthesis

(c) transfer of food to cotyledons

(d) transfer of food from cotyledons to embryo tips

Answer: (b) enzyme synthesis

13. A characteristic of drupe is

(a) fleshy seed coat

(b) stony pericarp

(c) stony mesocarp

(d) stony endocarp

Answer: (d) stony endocarp

14. Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is know as

(a) TCA pathway

(b) Glycolysis

(c) Hms pathway

(d) Glycolysis

Answer: (b) Glycolysis

15. End product of glycolysis is

(a) acetyl Coenzyme A

(b) PEP

(c) pyruvate

(d) OAA

Answer: (c) pyruvate

16. Respiratory enzymes are located in

(a) mitochondrial matrix

(b) Cristae

(c) perimitochondrial space

(d) outer membrane

Answer: (b) Cristae

17. Respiratory quotient of carbohydrates is

(a) 0.9

(b) 1.2

(c) 1

(d) 0

Answer: (c) 1

18. One molecule of glucose yields ___ ATP molecules in aerobic respiration.

(a) 2

(b) 16

(c) 38

(d) 42

Answer: (c) 38