Respiration in Plants Test

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Respiration in Plants Test - 67

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Weekly Quiz Competition

Question 1
1 / -0

Pick up the reactions from the following where a water molecule is removed and reduction of $$NAD^+$$ does not occur in the reactions of respiration.
i) Succinic acid to fumaric acid
ii) Malic acid to oxaloacetic acid
iii) 2-Phosphoglycerate to phosphoenol pyruvic acid
iv) Pyruvic acid to acetyl CoA

A
i, iv

B
i, ii

C
ii, iii

D
i, iii
Solution
i and iii reactions in which water is removed, but $$NAD^+$$ is not reduced.
Succinic acid to Fumaric acid
$$FAD^+$$ $$\rightarrow$$ $$FADH^+$$ + $$H_2O$$
2-phosphoglycerate to phosphoenol pyruvic acid
$$2- Phosphoglycerate$$ $$\rightarrow$$ $$2-Phosphoenol\,pyruvic\,acid$$ + $$H_2O$$
The ii and iv reaction occur in the following ways where $$NAD^+$$ is reduced.
Malic acid to Oxaloacetic acid
$$Malic\,acid$$ + $$NAD^+$$ $$\rightarrow$$ $$Oxaloacetic\,acid$$ + $$NADH^+$$ + $$H_2O$$
Pyruvic acid to Acetyl CoA
$$Pyruvic\,acid$$ + $$NAD^+$$+ $$CoA$$ $$\rightarrow$$ $$Acetyl\,CoA$$ + $$NADH$$+ $$CO_2$$+ $$H_2$$
So, the correct option is D.
Question 2
1 / -0

RQ is infinite in

A
Aerobic respiration

B
Anaerobic respiration

C
Carbohydrates

D
None of these

Solution

Anaerobic respiration is the respiration which takes place in the absence of oxygen. It is also known as fermentation. It takes place in the unicellular organisms. It leads to production of two ATP. Respiratory quotient is the ratio of volume of carbon dioxide produced to volume of oxygen consumed. In anaerobic respiration no oxygen is required. i.e., it occurs in the absence of oxygen and so, the RQ is infinity.
So, the correct answer is option B.
Question 3
1 / -0

Pyruvic acid is produced at the end of

A
Glycolysis

B
Krebs cycle

C
Calvin cycle

D
Photorespiration

Solution

A single glucose molecule in glycolysis produces a total of 2 molecules of pyruvic acid, 2 molecules of ATP, 2 molecules of NADH and 2molecules of water.
Question 4
1 / -0

The anaerobic respiration is also called as.

A
Fermentation

B
Fragmentation

C
Oxidation

D
Reduction

Solution

Fermentation is an anaerobic process in which energy can be released from glucose even though oxygen is not available. Fermentation occurs in yeast cells, and a form of fermentation takes place in bacteria and in the muscle cells of animals. So, the correct answer is option A.
Question 5
1 / -0

During aerobic respiration, the conversion of pyruvate into acetaldehyde along with TPP, the cofactor is

A
$$Mg^{2+}$$

B
$$Mn^{2+}$$

C
$$Fe^{3+}$$

D
$$Zn^{2+}$$

Solution

During anaerobic respiration, the enzyme pyruvate decarboxylase converts pyruvate into acetaldehydre and carbon dioxide. This is a decarboxylation reaction. The enzyme requires TPP (thiamine pyrophosphate) and Mg$$^{+2}$$ as a cofactor for the reaction to takes place.
Thus, the correct answer is option A.
Question 6
1 / -0

Aerobic respiratory pathway is appropriately called as

A
Anabolic

B
Catbolic

C
Amphibolic

D
Parabolic

Solution

Aerobic respiratory pathway is appropriately called amphibolic pathway. It contains both catabolic and anabolic reactions. The pathway is catabolic because in this pathway, glucose is broken down into carbon dioxide and water. It is also anabolic pathway as energy rich ATP molecule is produced during this pathway. These ATP molecules are later used to carry out various reaction.
Thus, the correct answer is option C.
Question 7
1 / -0

In Krebs cycle

A
Energy is stored in the form of ATP

B
Energy is stored in the form of ADP

C
Energy is liberated from ATP

D
Energy is liberated from ADP

Solution

The actual ATP generation steps of aerobic respiration occur during passage of electrons along ETS. Total four NADH is produced which leads to the production of 12 ATP. One FADH$$_2$$ leads to the production of two ATP. One GTP is formed. So 15 ATP is produced in one cycle of Kreb's Cycle. So two cycle leads to the production of 30 ATP.
Question 8
1 / -0

Which of the following molecules is common to respiration mediated breakdown of major biomolecules?

A
AcetylCoA

B
Glucose 6-phosphate

C
Fructose 1, 6 - biphosphate

D
Pyruvic acid

Solution

Acetyl Co-A is common in respiration mediated breakdown of major biomolecules like fats, carbohydrates, and proteins. It is an integral part of many cellular processes. It provides carbon atom required for the citric acid cycle. It is produced via glycolysis (breakdown of carbohydrates), gluconeogenesis (breakdown of protein) and fatty acid oxidation.
Thus, the correct answer is option A.
Question 9
1 / -0

Why Kreb cycle is also known as citric acid cycle ?

A
Due to first stable product as citric acid

B
First stable product citric acid contain two carboxyl group

C
First stable product citric acid contain 3-carboxyl group

D
Citric acid is devoid of any -COOH group
Solution
Correct option: A
Explanation:
The first stable product of Kreb's cycle is citric acid.
It is formed as a result of the reaction between oxaloacetate and acetyl CoA.
The 4 carbon and 2 carbon compound give rise to a 6 carbon compound.
Hence, "due to first stable product as citric acid", Kreb cycle is also known as a citric acid cycle.
Question 10
1 / -0

Consider the following:
1. Succinic dehydrogenase
2. Acomtase
3. alpha-ketoglutarate dehydrogenase
4. Isocitric dehydrogenase
What is the correct order in which the above enzymes catalyse the reactions in Kreb's cycle?

A
1-2-3-4

B
2-4-1-3

C
3-2-4-1

D
2-4-3-1

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Respiration in Plants Test - 67

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Respiration in Plants Test - 67

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Question 1

i, iv

i, ii

ii, iii

i, iii

Solution

Question 2

Aerobic respiration

Anaerobic respiration

Carbohydrates

None of these

Solution

Question 3

Glycolysis

Krebs cycle

Calvin cycle

Photorespiration

Solution

Question 4

Fermentation

Fragmentation

Oxidation

Reduction

Solution

Question 5

$$Mg^{2+}$$

$$Mn^{2+}$$

$$Fe^{3+}$$

$$Zn^{2+}$$

Solution

Question 6

Anabolic

Catbolic

Amphibolic

Parabolic

Solution

Question 7

Energy is stored in the form of ATP

Energy is stored in the form of ADP

Energy is liberated from ATP

Energy is liberated from ADP

Solution

Question 8

AcetylCoA

Glucose 6-phosphate

Fructose 1, 6 - biphosphate

Pyruvic acid

Solution

Question 9

Due to first stable product as citric acid

First stable product citric acid contain two carboxyl group

First stable product citric acid contain 3-carboxyl group

Citric acid is devoid of any -COOH group

Solution

Question 10

1-2-3-4

2-4-1-3

3-2-4-1

2-4-3-1

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