Respiration in Plants Test

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Respiration in Plants Test - 82

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Weekly Quiz Competition

Question 1
1 / -0

The net gain of energy in glycolysis is

A
12 ATP

B
2 ATP

C
4 ATP

D
Zero ATP

Solution

The net gain of ATP in Glycolysis is 2 ATP. During glycolysis a total of 4 ATP are formed. However, two ATP are utilized during the conversion of Glucose to Glucose -6- Phosphate and Fructose -1,6-bis phosphate. Therefore, net gain of ATP is 2.
So, the correct answer is '2 ATP'
Question 2
1 / -0

The value of $$Q_{10}$$ of respiration is –

A
Three

B
Two

C
Four

D
Six

Solution

The value of $$Q_{10}$$ determines the fractional change in rate of respiration or photosynthesis with every $$10^0$$C rise in temperature. The value of rate of respiration is almost or closer to 2 for all plant parts.
So, the correct answer is 'Two'
Question 3
1 / -0

The value of R.Q. is less than one of which substrate?

A
Glucose

B
Sucrose

C
Starch

D
Proteins

Solution

The value of R.Q for a substrate is the ratio of volume of $$CO_2$$ evolved to amount of $$O_2$$ consumed.
Glucose, Sucrose and Starch are carbohydrates hence the value of RQ is 1
For proteins the value of R.Q is 0.8, which is less than 1.
So, the correct answer is 'Proteins'
Question 4
1 / -0

How many ATPs are generated by the fermentation of one molecule of maltose?

A
2

B
3

C
6

D
4

Solution

Anaerobic respiration/anaerobic respiration yields 2 ATP from 1 molecule of glucose. Since maltose is formed of 2 glucose molecules, the ATP yield will be doubled. So 4 ATPs will be obtained.
So, the correct option is D.
Question 5
1 / -0

Which of the following options is correct with respect to steps in Krebs cycle?
Statement 1 - Succinic dehydrogenase converts succinic acid to fumaric acid.
Statement 2 - Malic acid forms succinic acid in presence of malate dehydrogenase.

A
Statement 1 and statement 2 both are correct.

B
Statement 1 is correct but statement 2 is incorrect.

C
Statement 1 is incorrect but statement 2 is correct.

D
Statement 1 and statement 2 is incorrect.

Solution

Succinic dehydrogenase converts Succinic acid to fumaric acid by removing two Hydrogen ions that are transferred to FAD to form $$FADH_2$$. Malic acid undergoes dehydrogenation in presence of malate dehydrogenase to form Oxaloacetic acid and NADH. So, the correct answer is Statement 1 is correct but statement 2 is incorrect.
Question 6
1 / -0

Select a suitable name for this process:
$$C_6H_{12}O_6$$ + 2ADP + 2pi $$\rightarrow$$ 2$$C_2H_{5}OH$$ + 2ATP + $$CO_2$$ $$\uparrow$$

A
Alcoholic fermentation

B
Photorespiration

C
Lactate fermentation

D
Aerobic respiration
Question 7
1 / -0

In Sedum, the R.Q at night is

A
Unity

B
More than unity

C
Less than unity

D
Zero

Solution

In plants using CAM, the stomata in the leaves remain shut during the day to reduce transpiration, but open at night to collect carbon dioxide. The $$CO_2$$ is stored as the four-carbon acid malate and then used during photosynthesis during the day. Sedum is a CAM plant. In CAM plants, the R.Q at night is zero due to incomplete oxidation of carbohydrates.
So, the correct answer is option D.
Question 8
1 / -0

In which type of reaction related to plant photosynthesis, peroxisomes are involved?

A
Glycolate cycle

B
Calvin cycle

C
Bacterial photosynthesis

D
Glyoxylate cycle

Solution

Glycolate cycle is also known as photorespiration that takes place in $$C_3$$ plants and occurs in chloroplasts, mitochondria and peroxisomes of plant cells. This pathway is involved in the formation of amino acids glycine and serine from non-phosphorylated intermediates of carbon reduction cycle of photosynthesis. Glycolate is the chief metabolite of photorespiration. Photorespiration is an oxidative process where oxidation of glycolate occurs with subsequent release of $$CO_2$$.
Thus, the correct answer is option A.
Question 9
1 / -0

Choose the correct combination of labeling the number of carbon compounds in the substrate molecules, involved in the citric acid cycle.

A
A - 4C, B - 6C, C - 5C, D - 4C, E - 4C

B
A - 6C, B - 5C, C - 4C, D - 3C, E - 2C

C
A - 2C, B - 3C, C - 4C, D - 5C, E - 6C

D
A - 4C, B - 5C, C - 6C, D - 4C, E - 4C

E
A - 4C, B - 6C, C - 4C, D - 4C, E - 4C

Solution

In the Krebs cycle, oxaloacetic acid, a 4 carbon compound reacts with acetyl coenzyme A to form citric acid, a 6 carbon compound. Citric acid undergoes decarboxylation and forms ketoglutaric acid which are a 5 carbon compound. Ketoglutaric acid undergoes the second decarboxylation to form succinic acid, a 4 carbon compound. Finally succinic acid changes to fumaric acid and then malic acid by hydration reaction.
So, the correct answer is option A.
Question 10
1 / -0

Oxidative phosphorylation and photophosphorylation both require the electron carrier

A
Cytochrome

B
Oxygen

C
Carbon dioxide

D
Water

Solution

Oxygen is a byproduct of photosynthesis formed by sunlight-driven splitting of water at PSII during light reactions of photosynthesis. The final electron acceptor is oxygen in mitochondrial electron transport chain and is reduced into water. Carbon dioxide is fixed into carbohydrates during the dark phase of photosynthesis using the energy of ATP and NADPH. The cytochromes are proteins with heme prosthetic groups and characteristic strong absorption of visible light. Mitochondria contain cytochrome a, b, and c as a component of complex III and complex IV. Cytochromes receive electron from ubiquinone and pass to oxygen. The cytochrome $$b_6$$f complex is present throughout the thylakoid membrane and photolysis of water at PSII excites its reaction center and pass the electron to cytochrome $$b_6$$f complex. Thus, the correct answer is option A.

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Respiration in Plants Test - 82

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Respiration in Plants Test - 82

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SHARING IS CARING

Question 1

12 ATP

2 ATP

4 ATP

Zero ATP

Solution

Question 2

Three

Two

Four

Six

Solution

Question 3

Glucose

Sucrose

Starch

Proteins

Solution

Question 4

2

3

6

4

Solution

Question 5

Statement 1 and statement 2 both are correct.

Statement 1 is correct but statement 2 is incorrect.

Statement 1 is incorrect but statement 2 is correct.

Statement 1 and statement 2 is incorrect.

Solution

Question 6

Alcoholic fermentation

Photorespiration

Lactate fermentation

Aerobic respiration

Question 7

Unity

More than unity

Less than unity

Zero

Solution

Question 8

Glycolate cycle

Calvin cycle

Bacterial photosynthesis

Glyoxylate cycle

Solution

Question 9

A - 4C, B - 6C, C - 5C, D - 4C, E - 4C

A - 6C, B - 5C, C - 4C, D - 3C, E - 2C

A - 2C, B - 3C, C - 4C, D - 5C, E - 6C

A - 4C, B - 5C, C - 6C, D - 4C, E - 4C

A - 4C, B - 6C, C - 4C, D - 4C, E - 4C

Solution

Question 10

Cytochrome

Oxygen

Carbon dioxide

Water

Solution

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