Respiration in Plants Test

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Respiration in Plants Test - 1

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Question 1
1 / -0

During cellular respiration, pyruvic acid is reduced to lactic acid in the presence of

A
NADH dehydrogenase

B
Dehydrogenase

C
Lactate dehydrogenase

D
Pyruvate dehydrogenase

Solution

Explanation:

Lactate dehydrogenase: (LDH) An enzyme that catalyzes the conversion of lactate to pyruvate When oxygen is inadequate for cellular respiration.

This is an important step in energy production in cells. Many different types of cells in the body contain this enzyme. Some of the organs relatively rich in LDH are the heart, kidney, liver, and muscle.
Question 2
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Which one is incorrect about Glycolysis?

A
Oxygen is not required for Glycolysis

B
It occurs inside the cytoplasm

C
It is a cyclic pathway

D
No carbon dioxide is evolved

Solution

Explanation:

Glycolysis is not a cyclic pathway and carbon dioxide gas is not released during this cycle. Oxygen is not required for Glycolysis process. Glycolysis occurs in cytoplasm of the cell.
Question 3
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The partial breakdown of glucose takes place in

A
TCA cycle

B
ETS cycle

C
Fermentation

D
Respiration

Solution

Explanation:

Fermentation is an anaerobic breakdown of carbohydrates in which an organic molecule is the final electron acceptor. It does not involve an electron transport system.

Furthermore,: it is a partial breakdown of glucose giving a little energy, 2 net ATP's per glucose by way of substrate-level phosphorylation.
Question 4
1 / -0

The enzyme which converts glucose into glucose -6- phosphate is

A
Succinyl CoA

B
Invertase

C
Hexokinase

D
Dehydrogenase

Solution

Explanation:

A hexokinase is an enzyme that phosphorylates hexoses (six-carbon sugars), forming hexose phosphate. In most organisms, glucose is the most important substrate of hexokinases, and glucose-6-phosphate is the most important product.
Question 5
1 / -0

How many net ATP are produced in Glycolysis?

A
8 ATP

B
16 ATP

C
36 ATP

D
2 ATP

Solution

Explanation:

At the end of glycolysis pathway, 2 net ATP molecules at step 6 and step 9 are produced.
Question 6
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The complete combustion of glucose produces

A
carbon dioxide and oxygen

B
Lactic acid

C
Pyurvic acid

D
Ethanol

Solution

Explanation:

The complete combustion of glucose, which produces carbon dioxide and water as end products, yields energy most of which is given out as heat.
Question 7
1 / -0

Glycolysis is also known as

A
Photophosphorylation

B
EMP pathway

C
Calvin cycle

D
TCA cycle

Solution

Explanation:

The scheme of glycolysis was given by Gustav Embden, Otto Meyerhof, and J. Parnas, and is often referred to as the EMP pathway.
Question 8
1 / -0

Pasture effect can be studied in case of

A
Pinnularia

B
Pencillium

C
Nostoc

D
Sccharomyces

Solution

Explanation:

Reduction in consumption of respiratory substrate when the mode of respiration is changed from aerobic to anaerobic is called pasture effect. It is studied in case of Sccharmomyces.
Question 9
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Respiration is

A
Both anabolic and catabolic

B
Anabolic process

C
Amphibolic process

D
Catabolic process

Solution

Explanation:

Catabolism is process of break down of any large substance into smaller ones. In respiration, glucose is broken down into carbon dioxide and water molecules. Thus it is referred to as a catabolic reaction
Question 10
1 / -0

In plants, the gaseous exchange take place in a) Stomata b) Roots c) Stems d) Lenticles

A
a) and b)

B
a) and d)

C
b) and c)

D
b) and d)

Solution

Explanation:

Plants unlike animals have no special systems for breathing or gaseous exchange. Stomata and lenticels allow gaseous exchange by diffusion.

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Respiration in Plants Test - 1

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Respiration in Plants Test - 1

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Question 1

NADH dehydrogenase

Dehydrogenase

Lactate dehydrogenase

Pyruvate dehydrogenase

Solution

Question 2

Oxygen is not required for Glycolysis

It occurs inside the cytoplasm

It is a cyclic pathway

No carbon dioxide is evolved

Solution

Question 3

TCA cycle

ETS cycle

Fermentation

Respiration

Solution

Question 4

Succinyl CoA

Invertase

Hexokinase

Dehydrogenase

Solution

Question 5

8 ATP

16 ATP

36 ATP

2 ATP

Solution

Question 6

carbon dioxide and oxygen

Lactic acid

Pyurvic acid

Ethanol

Solution

Question 7

Photophosphorylation

EMP pathway

Calvin cycle

TCA cycle

Solution

Question 8

Pinnularia

Pencillium

Nostoc

Sccharomyces

Solution

Question 9

Both anabolic and catabolic

Anabolic process

Amphibolic process

Catabolic process

Solution

Question 10

a) and b)

a) and d)

b) and c)

b) and d)

Solution

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