Respiration in Plants Test

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Question 1
4 / -1

Select the wrong statement with respect to glycolysis.

A
It occurs outside mitochodria

B
It is an anaerobic phase

C
Glucose undergoes partial oxidation to form 2 molecules of pyruvic acid

D
Glucose is phosphorylated to glucose-6-phosphate by isomerase enzyme

Question 2
4 / -1

Which of the following steps during glycolysis is associated with utilization of ATP?

A
Glucose → Glucose - 6 - phosphate

B
Fructose - 6 - phosphate → Fructose-1,6-bisphosphate

C
PEP → Pyruvic acid

D
Both (a) and (b)

Question 3
4 / -1

Which of the following conversions involve ATP synthesis during glycolysis?

A
Glucose → Glucose-6-phosphate

B
Fructose-6-phosphate → Fructose-1,6-biphosphate

C
1,3-bisphosphoglyceric acid (BPGA) → 3- phosphoglyceric acid (PGA)

D
All of these

Question 4
4 / -1

The flow chart given below shows the steps in glycolysis. Select the option that correctly fills in the missing steps A, B, C, and D.

A
A-Fructose-6-phosphate; B-Fructose-1,6-biphosphate; C- 3-PGAL; D-1,3-biphosphoglyceric acid

B
A- Fructose -1,6-biphosphate ; B- 3-PGAL ; C- 1,3-biphosphoglyceric acid ; D-3 PGAL

C
A- 3PGAL ; B-1,3 biophosphoglyceric acid ; C-3PGAL ; D- Frutose-1,6-biphosphate

D
A- Fructose -1,6-biophosphate ; B-Fructose -6- phosphate ; C-PGAL ; D-1,3- biphosphoglyceric acid

Question 5
4 / -1

Fate of pyruvic acid during aerobic respiration is

A
Lactic acid fermentation

B
Alcoholic fermentation

C
Oxidative decarboxylation

D
Oxidative phosphorylation

Question 6
4 / -1

Substrate level phosphorylation occurs during which step of Krebs' cycle?

A
Succinyl - CoA → Succinicacid

B
Isocitricacid → Oxalosuccinicacid

C
Oxalosuccinicacid → α−ketoglutaricacid

D
Malicacid → OAA

Question 7
4 / -1

The first 5C dicarboxylic acid in Krebs' cycle which is used in nitrogen metabolism is

A
OAA

B
Citric acid

C
α-ketoglutaric acid

D
Acetyl coenzyme A

Question 8
4 / -1

Kreb’s cycle is also called metabolic sink as it is a common pathway for:

A
Carbohydrates, fats and proteins (amino acids)

B
Carbohydrates, fats only

C
Carbohydrates and organic acids only

D
proteins and fats only

Question 9
4 / -1

When two molecules of acetyl CoA enter the TCA cycle, net gain at the end of the cycle is

A
2NADH₂ + 2FADH₂ + 1GTP

B
3NADH₂ + 2FADH₂ + 2GTP

C
6NADH₂ + 2FADH₂ + 2GTP

D
3NADH₂ + 1FADH₂ + 4GTP

Question 10
4 / -1

Which is true about the end products of glycolysis?

A
2 pyruvicacid + 2ATP + 2NADH₂

B
2 pyruvicacid + 2NADH₂

C
1 pyruvicacid + 2ATP + 2NADH₂

D
2 pyruvicacid + 1ATP + 1NADH₂

Question 11
4 / -1

Seeds respire in the

A
Presence of O₂

B
Presence of CO₂

C
Absence of O₂

D
Both (a) and (c)

Question 12
4 / -1

The respiration in germinating seeds produces energy, which can be detected in the form of

A
Water

B
Heat

C
Oxygen

D
CO₂

Question 13
4 / -1

Site of Krebs' cycle in mitochondria is

A
Outer membrane

B
Matrix

C
Oxysomes

D
Inner membrane

Question 14
4 / -1

In Krebs cycle the FAD participates as electron acceptor during the conversion of

A
Succinyl CoA to succinic acid

B
α− ketoglutarate to succinyl CoA

C
Succinic acid to fumaric acid

D
Fumaric acid to malic acid

Question 15
4 / -1

Krebs' cycle starts with the formation of a six carbon compound by reaction between

A
Fumaric acid and pyruvic acid

B
OAA and acetyl CoA

C
Malic acid and acetyl CoA

D
Succinic acid and pyruvic acid

Question 16
4 / -1

Alternate name of Krebs' cycle is

A
TCA cycle

B
Citric acid cycle

C
Both (a) and (b)

D
None of these

Question 17
4 / -1

Read the given statements and select the correct option.
Statement 1: Glycolysis occurs in mitochondrial matrix.
Statement 2: Kerbs' cycle occurs on cristae of mitochondria.

A
Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1

B
Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1

C
Statement 1 is correct and statement 2 is incorrect

D
Both statements 1 and 2 are incorrect

Question 18
4 / -1

Categories the given equations under respective phases and select the correct option.

A
I-Glycolysis; II-Fermentation; III-Krebs' cycle

B
I-Krebs' cycle; II - Fermentation; III -Glycolysis

C
I-Krebs' cycle; II- Glycolysis; III- Fermentation

D
I- Glycolysis; II- Krebs' cycle; III-Fermentation

Question 19
4 / -1

Respiratory pathway is

A
Catabolic

B
Amphibolic

C
Anabolic

D
Endergonic

Question 20
4 / -1

Which of the following steps of respiration is amphibolic?

A
Glycolysis

B
Oxidative decarboxylation of pyruvate

C
TCA cycle

D
Oxidative phosphorylation

Question 21
4 / -1

Read the given statements and select the correct option.
Statement 1: Mitochondria is known as power house of cell.
Statement 2: ATP synthesis occurs in mitochondria.

A
Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1

B
Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1

C
Statement 1 is correct and statement 2 is incorrect

D
Both statements 1 and 2 are incorrect

Question 22
4 / -1

Refer to the given figure and select the correct option for A,B,C and D.

A
A- Fats; B- Proteins; C- 3-PGAL; D- AcetylCoA

B
A-Fats; B- Proteins; C- 3-PGAL; D- CO₂

C
A-Proteins; B- Fats; C- Acetyl CoA; D- PEP

D
A-Proteins; B- Fats; C- PEP; D- Acetyl CoA

Question 23
4 / -1

All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner-mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is

A
Isocitrate dehydrogenase

B
Ketoglutarate dehydrogenase

C
Succinate dehydrogenase

D
Lactate dehydrogenase

Question 24
4 / -1

Which of the following cellular metabolic processes can occur both in the presence or absence of O₂?

A
Glycolysis

B
Fermentation

C
TCA cycle

D
Electron transport coupled with chemiosmosis

Question 25
4 / -1

Consider the first reaction of TCA cycle.

What is true about compound A?

A
First product of TCA cycle

B
Tricarboxylic acid and six carbon compound

C
It undergoes reorganisation in the presence of enzyme aconitase to form cis-aconitate

D
All of these

Question 26
4 / -1

Rise in the water level from X to Y in the given experimental set-up demonstrates

A
Aerobic respiration

B
Anaerobic respiration

C
Photosynthesis

D
Transpiration pull

Question 27
4 / -1

Which of the following is a 4-carbon compound?

A
Oxaloacetic acid

B
Phosphoglyceric acid

C
Ribulose bis phosphate

D
Phosphoenol pyruvate

Question 28
4 / -1

Select the wrong statement

A
Oxidative decarboxylation of pyruvic acid requires the presence of enzyme pyruvate dehydrogenase.

B
All living cells whether aerobic or anaerobic, perform glycolysis.

C
Cyanide does not stop chemiosmosis.

D
Respiratory chain uses O₂ as final hydrogen acceptor.

Question 29
4 / -1

During complete metabolism of glucose, the number of ATP formed is

A
2

B
12

C
36

D
44

Question 30
4 / -1

Read the given statements and select the correct option.
Statement 1: During photophosphorylation (of photosynthesis), light energy is utilised for the production of a proton gradient during ATP synthesis.
Statement 2: In respiration, the energy of oxidation-reduction is utilised for the phosphorylation and thus the process is called oxidative phosphorylation.

A
Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1

B
Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1

C
Statement 1 is correct and statement 2 is incorrect

D
Both statements 1 and 2 are incorrect

Question 31
4 / -1

Electron transport chain (ETC) is a set of ______ electron carriers present in a specific sequence along ______ mitochondrial membrane.

A
seven, inner

B
six, inner

C
seven, outer

D
six, outer

Question 32
4 / -1

During the process of aerobic respiration, (i) gets oxidised and its electrons get transferred to the electron transport chain while in photosynthesis, (ii) gets oxidised to transfer molecules to the electron transport chain.

A
(i)-glucose; (ii)-xanthophyll

B
(i)-carbon dioxide, (ii)-xanthophyll

C
(i)-carbon dioxide, (ii)-chlorophyll-a

D
(i)-glucose, (ii)-chlorophyll-a

Question 33
4 / -1

Select the option that correctly fills the blanks in the following statements.
A. Glucose has (i) carbon atoms, pyruvic acid has (ii) carbon atoms and the acetyl group has (iii) carbon atoms.
B. Electrons enter the electron transport system as parts of hydrogen atoms attached to (i) and (ii).

A
A-(i)-6, (ii)-4, (iii)-3; B -(i)-NADH, (ii)- FADH₂

B
A-(i)-6, (ii)-3, (iii)-2; B- (i)-NADH, (ii)- FADH₂

C
A-(i)-6, (ii)-3, (iii)-2; B-ATP, (ii)- GTP

D
A-(i)-6, (ii)-4, (iii)-3; B-ATP, (ii)- GTP

Question 34
4 / -1

Amount of energy released during hydrolysis of a high energy bond of ATP is

A
73 Kcal mol⁻¹

B
0.73 Kcal mol⁻¹

C
3.4 Kcal mol⁻¹

D
7.3 Kcal mol⁻¹

Question 35
4 / -1

Select the correct statements.
(i) Between temperature range 0−25^∘C, rate of respiration doubles for every 10^∘C rise in temperature.
(ii) Cytochromes are iron-porphyrin compounds.
(iii) Respiratory rate of wounded or injured plant parts generally decreases.

A
(i) and (ii)

B
(ii) and (iii)

C
(i) and (iii)

D
(i), (ii) and (iii)

Question 36
4 / -1

Which of these are respiratory poisons or inhibitors of ETC?

A
Cyanides

B
Antimycin A

C
Carbon monoxide

D
All of these

Question 37
4 / -1

How many ATP molecules will be generated in a plant system during the complete oxidation of 40 molecules of glucose?

A
180

B
360

C
1440

D
3040

Question 38
4 / -1

Select the wrong statement -

A
When tripalmitin is used as a substrate in respiration, the RQ is 0.7.

B
The intermediate compound which links glycolysis with Krebs' cycle is malic acid.

C
One glucose molecule yields a net gain of 36 ATP molecules during aerobic respiration.

D
One glucose molecule yields a net gain of 2 ATP molecules during glycolysis.

Question 39
4 / -1

In the electron transport system present in the inner mitochondrial membrane, complexes I and IV are respectively:

A
NADH dehydrogenase and FADH₂

B
FADH₂ and NADH dehydrogenase

C
NADH dehydrogenase and cytochromec oxidase complex

D
NADH dehydrogenase and ATP synthase

Question 40
4 / -1

Match column I with column II and select the correct option from the codes given below.

A
A-(iii), B-(i), C-(ii)

B
A-(iii), B-(ii), C-(i)

C
A-(i), B-(ii), C-(iii)

D
A-(ii), B-(i), C-(iii)

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Respiration in ...

Question 1

It occurs outside mitochodria

It is an anaerobic phase

Glucose undergoes partial oxidation to form 2 molecules of pyruvic acid

Glucose is phosphorylated to glucose-6-phosphate by isomerase enzyme

Question 2

Glucose → Glucose - 6 - phosphate

Fructose - 6 - phosphate → Fructose-1,6-bisphosphate

PEP → Pyruvic acid

Both (a) and (b)

Question 3

Glucose → Glucose-6-phosphate

Fructose-6-phosphate → Fructose-1,6-biphosphate

1,3-bisphosphoglyceric acid (BPGA) → 3- phosphoglyceric acid (PGA)

All of these

Question 4

A-Fructose-6-phosphate; B-Fructose-1,6-biphosphate; C- 3-PGAL; D-1,3-biphosphoglyceric acid

A- Fructose -1,6-biphosphate ; B- 3-PGAL ; C- 1,3-biphosphoglyceric acid ; D-3 PGAL

A- 3PGAL ; B-1,3 biophosphoglyceric acid ; C-3PGAL ; D- Frutose-1,6-biphosphate

A- Fructose -1,6-biophosphate ; B-Fructose -6- phosphate ; C-PGAL ; D-1,3- biphosphoglyceric acid

Question 5

Lactic acid fermentation

Alcoholic fermentation

Oxidative decarboxylation

Oxidative phosphorylation

Question 6

Succinyl - CoA → Succinicacid

Isocitricacid → Oxalosuccinicacid

Oxalosuccinicacid → α−ketoglutaricacid

Malicacid → OAA

Question 7

OAA

Citric acid

α-ketoglutaric acid

Acetyl coenzyme A

Question 8

Carbohydrates, fats and proteins (amino acids)

Carbohydrates, fats only

Carbohydrates and organic acids only

proteins and fats only

Question 9

2NADH2 ​+ 2FADH2​ + 1GTP

3NADH2​ + 2FADH2​ + 2GTP

6NADH2​ + 2FADH2​ + 2GTP

3NADH2​ + 1FADH2 ​+ 4GTP

Question 10

2 pyruvicacid + 2ATP + 2NADH2

2 pyruvicacid + 2NADH2​

1 pyruvicacid + 2ATP + 2NADH2

2 pyruvicacid + 1ATP + 1NADH2​

Question 11

Presence of O2​

Presence of CO2​

Absence of O2​

Both (a) and (c)

Question 12

Water

Heat

Oxygen

CO2

Question 13

Outer membrane

Matrix

Oxysomes

Inner membrane

Question 14

Succinyl CoA to succinic acid

α− ketoglutarate to succinyl CoA

Succinic acid to fumaric acid

Fumaric acid to malic acid

Question 15

Fumaric acid and pyruvic acid

OAA and acetyl CoA

Malic acid and acetyl CoA

Succinic acid and pyruvic acid

Question 16

TCA cycle

Citric acid cycle

Both (a) and (b)

2NADH₂ + 2FADH₂ + 1GTP

3NADH₂ + 2FADH₂ + 2GTP

6NADH₂ + 2FADH₂ + 2GTP

3NADH₂ + 1FADH₂ + 4GTP

2 pyruvicacid + 2ATP + 2NADH₂

2 pyruvicacid + 2NADH₂

1 pyruvicacid + 2ATP + 2NADH₂

2 pyruvicacid + 1ATP + 1NADH₂

Presence of O₂

Presence of CO₂

Absence of O₂

CO₂

A-Fats; B- Proteins; C- 3-PGAL; D- CO₂

Respiratory chain uses O₂ as final hydrogen acceptor.