CBSE Class 11 Biology Respiration In Plants Worksheet Set B

Respiration in Plants MCQ Questions with Answers Class 11 Biology

Question- The complex concerned with oxidative phosphorylation in inner mitochondrial membrane is

(1) Complex IV

(2) Complex V

(3) Complex III

(4) Complex II

Answer (2)

Question-  Reducing power NADH + H+ is produced during conversion step of glycolysis.

(1) 3-phosphoglyceric acid to 2-phosphoglycerate

(2) Glyceraldehyde-3-phosphate to 1,3-bisphosphoglyceric acid

(3) 2-phosphoglycerate to phosphoenol pyrurvate

(4) Phosphoenol pyruvate to pyruvic acid

Answer (2)

Question- During cellular respiration, number of ATP used during conversion of glucose into glyceraldehyde-3-phosphate is

(1) 1

(2) 2

(3) 3

(4) 4

Answer (2)

Question-  Choose correct option w.r.t. anaerobic respiration

(1) The first oxidation step occur in mitochondria

(2) All reactions occur in the cytoplasm

(3) They require oxygen only at one step

(4) First step of eaction occur in cytoplasm then in mitochondria

Answer (2)

Question-  End product of anaerobic respiration is

(1) Phosphoglyceric acid

(2) Pyruvic acid

(3) Lactic acid

(4) Glyceraldehyde phosphate

Answer (3)

Question- Ubiquinone receives reducing equivalents from

(1) NAD+

(2) FADH₂

(3) NADH + H+

(4) Both (2) & (3)

Answer (4)

Question- Concentration of alcohol in a sugar solution inoculated with yeast after which yeast gets killed is

(1) 13%

(2) 25%

(3) 30%

(4) 20%

Answer (1)

Question- Which of the given enzymes of glycolysis is required at the beginning of process?

(1) Hexokinase

(2) Aldolase

(3) Isomerase

(4) Mutase

Answer (1)

Question- Cramps are formed during vigorous exercise, it is due to production of _____ in muscles.

(1) Acetyl coenzyme A

(2) Ethyl alcohol

(3) Lactic acid

(4) Acetic acid

Answer (3)

Question- Number of acetyl CoA formed from one molecule of glucose is

(1) 1

(2) 2

(3) 4

(4) 6

Answer (2)

Question- Which enzyme of glycolysis is also called as pacemaker enzyme?

(1) Hexokinase

(2) Enolase

(3) Phosphofructokinase

(4) Pyruvate kinase

Answer (3)

Question- How many carbon atoms are present in Acetyl CoA?

(1) 2

(2) 6

(3) 4

(4) 3

Answer (1)

Question- Which of the following product is formed by Krebs cycle?

(1) Acetyl CoA

(2) ADP

(3) ATP

(4) NAD+

Answer (3)

Question- How many ATP molecules are formed by oxidative phosphorylation from NADH produced during single Krebs cycle?

(1) 6

(2) 18

(3) 30

(4) 9

Answer (4)

Question- Citric acid is formed in Krebs cycle by the combination of oxaloacetate with

(1) OAA

(2) Acetyl CoA

(3) Malic acid

(4) Pyruvic acid

Answer (2)

Question- Mineral activator needed for the enzyme isocitrate dehydrogenase of TCA cycle is

(1) Fe

(2) Mg

(3) Mn

(4) Cu

Answer (3)

Question- The enzymes of Krebs cycle where NADH + H+ are produced are

(1) Isocitrate dehydrogenase, succinate dehydrogenase and malic dehydrogenase

(2) Succinate thiokinase, succinate dehydrogenase and aconitase

(3) Isocitrate dehydrogenase, α-ketoglutaric dehydrogenase, malic dehydrogenase

(4) Isocitrate dehydrogenase, α-ketoglutaric dehydrogenase and succinate dehydrogenase

Answer (3)

Question- Where does ETS occur in our body?

(1) Cytoplasm

(2) Mitochondrial matrix

(3) Inner mitochondrial membrane

(4) Outer mitochondrial membrane

Answer (3)

Question- Connecting link between glycolysis and TCA cycle is

(1) Link reaction

(2) EMP pathway

(3) ETC

(4) Citric acid cycle

Answer (1)

Question- Complex which transfers electrons of FADH₂ to ETS is

(1) I

(2) II

(3) III

(4) IV

Answer (2)

Question- Mobile electron carrier in ETS in mitochondrial membrane is

(1) Complex I

(2) Cyt c

(3) Cyt a – a₃

(4) Cyt bc₁

Answer (2)

Question- How many complexes are involved in electron transport in mitochondria?

(1) 1

(2) 2

(3) 4

(4) 5

Answer (3)

Question- Common molecule formed from all food stuffs during aerobic respiration is

(1) Glucose

(2) PGAL

(3) Pyruvic acid

(4) Acetyl CoA

Answer (4)

Question- The efficiency of aerobic respiration is approximately

(1) 50%

(2) 45%

(3) 90%

(4) 30%

Answer (2)

Question- Which of these has R.Q. value more than one?

(1) Fat

(2) Protein

(3) Carbohydrate

(4) Organic acids

Answer (4)

Question-  Conversion of fructose-6-phosphate to fructose-1,6-bisphosphate in respiration requires

(1) Hexokinase

(2) Enolase

(3) Phosphofructokinase

(4) Pyruvate kinase

Answer (3)

Question- Select the statement which is not related to fermentation

(1) It accounts for only a partial breakdown of glucose

(2) It gives only 2ATP as net for glucose degradation upto pyruvic acid

(3) NADH is oxidized slowly as compared to aerobic respiration

(4) ETS gives 11ATP for each Krebs cycle

Answer (4)

Question- How many redox equivalents are removed from two molecules of 3-PGAL?

(1) 3

(2) 4

(3) 1

(4) 2

Answer (2)

Question- Primary acceptor of TCA cycle is

(1) OAA

(2) Acetyl CoA

(3) Citric acid

(4) Pyruvic acid

Answer (1)

Question- Fumarase enzyme converts

(1) Succinic acid to malic acid

(2) Succinic acid to fumaric acid

(3) Fumaric acid to malic acid

(4) Fumaric acid to citric acid

Answer (3)

Question- A Krebs cycle intermediate as raw material for chlorophyll production is synthesised after

(1) Condensation

(2) Substrate level phosphorylation

(3) Hydration

(4) Oxidative decarboxylation

Answer (4)

Question- Select the correct statement w.r.t. Krebs cycle

(1) Occurs in cytoplasm and mitochondria in the absence of O₂

(2) Favoured by coenzyme NADP+

(3) Intermediate products contain four, five and six carbon atoms

(4) Substrate molecule is a 3C compound

Answer (3)

Question- ATP generated by 1 NADH₂ and 1 FADH₂ are respectively

(1) 3, 2

(2) 2, 3

(3) 3, 5

(4) 5, 3

Answer (1)

Question- Mobile electrons carriers in ETS in mitochondrial membrane are

(1) PQ, PC

(2) CoQ, Cyt c

(3) PQ, Cyt c

(4) PC, CoQ

Answer (2)

Question-  Slow oxidation of NADH occurs in

(1) Fermentation

(2) Aerobic respiration

(3) Dicarboxylic acid cycle

(4) PPP

Answer (1)

Question- A false statement regarding cytochrome c-oxidase complex in ETS in mitochondria is

(1) Receives electrons directly from ubiquinone

(2) Capable of reducing O₂

(3) Extend across the thickness of inner mitochondrial membrane

(4) Contains Fe & Cu both

Answer (1)

Question- In prokaryotic cells, number of ATP generated from one glucose molecule is

(1) 36

(2) 38

(3) 34

(4) 32

Answer (2)

Question- Intermediate common to proteins and carbohydrate oxidation is

(1) Pyruvate

(2) Glycerol

(3) Oxaloacetate

(4) Succinate

Answer (1)

Question- Inhibition of sugar breakdown due to the presence of O₂ under anaerobic condition is called

(1) Pasteur effect

(2) Warburg effect

(3) Crabtree effect

(4) Kutusky effect

Answer (1)

More Question

Q1. Define respiration.

Q2. Why is stepwise release of energy useful to organisms?

Q3. What are respiratory substrates?

Q4. Give balanced equation of respiration.

Q5. Which are the organs for gaseous exchange in plants?

Q6. Why can plants get along without respiratory organs? Give reasons.

Q7. Give differences between aerobic & anaerobic respiration.

Q8. Give schematic representation of mechanism of aerobic respiration.

Q9 (a) Give schematic representation of glycolysis. (b) What are its end products?
(c) How many ATP & NAOH produced by it.

Q10. Explain fermentation in yeast.

Q11. What is oxidative decarboxylation? What happens to pyruvate immediately after the reaction? Name the enzyme involved in the reaction.

Q12 (a) Give schematic representation of Kreb’s Cycle.
(b) What is the net gain of NADH + A+ in the cycle?
(c) What is the no. of CO2 produced in it? 
(d) Give significance of TCA cycle.

Q13. Give schematic representation of election transport chain in mitochondria & give role of complex I, II, III, IV & V.

Q14. What is oxidative phosphorylation? Describe the structure & role of F0-F1 particles in this process.

Q15. In tabular form calculate the total No. of ATP produced from one molecule of glucose during aerobic respiration.

Q16. Justify the statement. “Respiratory pathway – An amphibolic pathway.”

Q17. What is respiratory quotient? Give R.Q. values for carbohydrate, fats proteins & organic acids.