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Friday, 10 September 2021

MCQs l Respiration in plants -2 l NEET 2021 l NEET 2022 l Biology Class XI l ABHYAS l NTA


1.       In all the following reactions, reduction of NAD+ to NADH occurs, except

a.       isocitric acid → α- ketoglutaric acid

b.       malic acid→ oxaloacetic acid

c.        pyruvic acid → acetyl coenzyme

d.       succinic acid → fumaric acid

2.       In the formation of Acetyle  Co- A from pyruvic acid in mitochondria, pyruvic acid gets

a.       oxidised

b.       decarboxylated

c.        both (a) and (b)

d.       reduced and isomerised

3.       How many NADPH molecules are formed in a single turn of the Krebs cycle?

a.       4

b.       Zero

c.        3

d.       8

4.       Flow of electrons in ETS is

a.       Fe+ + +    Cu+ → Fe+ +

b.       Fe+ + → Fe+ + + 

c.        Fe+3 → Fe+2 → Fe+3

d.       Fe+2 → Fe+3 → Fe+2

5.       A single turn of the citric acid cycle yields

a.       2 FADH2, 2 NADH2, 2 GTP

b.       1 FADH2, 2 NADH2, 1 GTP

c.        1 FADH2,  3 NADH2, 1 GTP

d.       1 FADH2, 4 NADH2, 1 GTP

 Answer Key:

1. d

2. c

3. b

4.  c

5.  c

 

Thursday, 9 September 2021

MCQs l Respiration in plants -1 l NEET 2021 l NEET 2022 l Biology Class XI l ABHYAS l NTA

 


1.      1.  Terminal oxidation of one molecule of NADH gives:

a.       3 ATP molecules

b.       12 ATP molecules

c.        2 ATP molecules

d.       1 ATP molecules

2.       End product of glycolysis is

a.       Acetyl CoA

b.       Pyruvic acid

c.        Glucose 1- phosphate

d.       Fructose 1- phosphate

3.       Site of glycolysis in a prokaryotic cell is

a.       mesosome

b.       cytosol

c.        cell membrane

d.       nucleoid

4.       Which metabolic pathway is common pathway in both anaerobic and aerobic respiration?

a.       TCA cycle

b.       ETS

c.        EMP pathway

d.       Kreb’s cycle

5.       Which off the following occurs in glycolysis?

a.       Carboxylation

b.       decarboxylation

c.        Reduction

d.       Oxidation

 

 Answers:

1.  a

2.  b

3.  b

4.  c

5. d

 

MCQs l Respiration in plants -2 l NEET 2021 l NEET 2022 l Biology Class XI l ABHYAS l NTA

1.        In all the following reactions, reduction of NAD + to NADH occurs, except a.        isocitric acid → α- ketoglutaric acid b...