Respiration in Plants Test

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Respiration in Plants Test - 80

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Weekly Quiz Competition

Question 1
1 / -0

RQ in anaerobic respiration is?

A
$$0.7$$

B
$$0.9$$

C
Unity

D
Infinity

Solution

During aerobic respiration, oxygen is consumed and carbon dioxide is released. The ratio of the volume of carbon dioxide given out to the volume of oxygen absorbed in respiration, i.e., CO$$_2$$/O$$_2$$ is called respiratory quotient (RQ) or respiratory ratio. in anaerobic respiration, CO2 is evolved but O2 is not consumed, and therefore RQ is infinite (∞).
Equation is as follows:
C$$_6$$H$$_12$$O$$_6$$ $$\rightarrow$$ 2C$$_2$$H$$_5$$OH + 2CO$$_2$$ + energy
RQ CO$$_2$$/O$$_2$$ = 2/0 = infinity

So the correct option is 'infinity'.
Question 2
1 / -0

Complex $$IV$$ in ETS represent which of these compounds?

A
Ubiquinol

B
Cytochrome c oxidase

C
Ubiquinone

D
Cytochrome c
Question 3
1 / -0

Which of the following is incorrect for glycolysis?

A
The end products of this process are $$CO_2$$ and $$H_2O$$

B
IT produces ATP

C
It uses ATP

D
None of these.

Solution

So, the correct option is 'The end product of this process are CO2 and H2O'.
Question 4
1 / -0

Which of the following is the step of TCA cycle showing substrate levelphosphorylation?

A
Succinyl CoA$$\rightarrow $$ fumarate

B
Succinyl CoA $$\rightarrow$$ succinate

C
Fumarate$$\rightarrow $$Malate

D
Malate$$\rightarrow $$oxaloacetate

Solution

option $$"B"$$ is correct.

Succinyl COA $$\rightarrow$$ succinate is the step of TCA cycle showing substrate level phosphorylation. The cleavage of the thioester bond of succinyl COA is coupled with the phosphorylation of an ADP or a GDP (substrate level phosphorylation). This is catalyzed by succinyl COA synthetase. ATP and GTP are energetically equivalent.
Question 5
1 / -0

In respiration pyruvic acid is

A
Formed only when oxygen is available

B
One of the products of Kreb's cycle

C
Broken down into a two carbon fragment and $$CO_2$$

D
A result of protein breakdown.
Solution
Correct Option: C
Explanation:
The last step in glycolysis yields pyruvic acid which is a 3 C compound. Now, this pyruvic acid may undergo anaerobic respiration in absence of oxygen.
However, in presence of oxygen, it enters Krebs' cycle by undergoing oxidative decarboxylation using pyruvate dehydrogenase complex. This is a link reaction between glycolysis and Krebs' cycle.
As a result of decarboxylation, pyruvic acid forms Acetyl CoA (2 C compound) and releases $$CO_2$$.
So the answer is 'Broken down into two-carbon fragments and $$CO_2$$'.
Question 6
1 / -0

How many TCA cycles are required during the complete oxidation of one sucrose molecule.

A
4

B
2

C
1

D
3

Solution

Sucrose is a disaccharide made up of glucose and fructose. Two glucose molecules form four molecules of pyruvate during glycolysis. One molecule of pyruvate means one round TCA cycle. Here, four molecules of pyruvate mean four rounds of TCA cycle. So, the correct option is "4".
Question 7
1 / -0

How many molecules of pyruvic aci are formed in glycolysis

A
2

B
1

C
15

D
16
Question 8
1 / -0

How many molecule of $$CO_2$$ are released in citric acid cycle?

A
One

B
Two

C
Three

D
Six

Solution

Citric acid cycle is also called as tricarboxylic acid cycle or krebs cycle. Acetyl CoA enters a cyclic pathway known as citric acid cycle. The citric acid cycle is a series of reactions that produces two carbon dioxide molecules (when isocitrate change into alpha-ketoglutarate and alpha-ketoglutarate is converted into succinyl CoA), one GTP/ATP, and reduced forms of NADH and $$FADH_2$$.
So, the correct option is option B.
Question 9
1 / -0

Final electron acceptor in fermentation

A
$$O_2$$

B
organic molecule

C
$$H_2O$$

D
always pyruvic acid
Question 10
1 / -0

How many rounds of Krebs cycle will be required to produce $$6$$ FADH2 molecular

A
$$3$$

B
$$6$$

C
$$12$$

D
$$24$$

Solution

Answer (A): 3
One kreb's cycle gives $$2FADH_2$$ molecules, it takes $$3$$ cycles to produce $$6FADH_2$$.

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Re-Attempt Weekly Quiz Competition

Respiration in Plants Test - 80

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Respiration in Plants Test - 80

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SHARING IS CARING

Question 1

$$0.7$$

$$0.9$$

Unity

Infinity

Solution

Question 2

Ubiquinol

Cytochrome c oxidase

Ubiquinone

Cytochrome c

Question 3

The end products of this process are $$CO_2$$ and $$H_2O$$

IT produces ATP

It uses ATP

None of these.

Solution

Question 4

Succinyl CoA$$\rightarrow $$ fumarate

Succinyl CoA $$\rightarrow$$ succinate

Fumarate$$\rightarrow $$Malate

Malate$$\rightarrow $$oxaloacetate

Solution

Question 5

Formed only when oxygen is available

One of the products of Kreb's cycle

Broken down into a two carbon fragment and $$CO_2$$

A result of protein breakdown.

Solution

Question 6

4

2

1

3

Solution

Question 7

2

1

15

16

Question 8

One

Two

Three

Six

Solution

Question 9

$$O_2$$

organic molecule

$$H_2O$$

always pyruvic acid

Question 10

$$3$$

$$6$$

$$12$$

$$24$$

Solution

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