Respiration in Plants Test

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Respiration in Plants Test - 18

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Question 1
1 / -0

R.Q. of sprouting potato tubers is

A
1

B
< 1

C
> 1

D
0

Solution

Potato tubers are rich in carbohydrates. Thus being hexose sugars they will have same volume of $$CO_2$$ eliminated as well as $$O_2$$ consumed. Thus, $$CO_2$$ / $$O_2$$ = 1.
Question 2
1 / -0

The incomplete breakdown of sugars in anaerobic respiration results in the formation of _____________.

A
Fructose and water

B
Glucose and $$CO_{2}$$

C
Alcohol and $$CO_{2}$$

D
Water and $$CO_{2}$$
Solution
- Anaerobic respiration involves the incomplete breakdown of glucose.
- It releases around 5% of the energy released by aerobic respiration, per molecule of glucose.
- In yeast, it can be observed, as alcoholic fermentation.
- A biological process in which molecules such as glucose, fructose, and sucrose are converted into cellular energy and thereby produce ethanol and carbon dioxide as metabolic waste products.
So, the correct answer is option C.
Question 3
1 / -0

How many ATP molecules are obtained from fermentation of 1 molecule of glucose?

A
2

B
4

C
3

D
5

Solution

Correct Option: A
Explanation:
Fermentation does not involve an electron transport system, and no ATP is made by the fermentation process directly.
When glucose undergoes fermentation, there is a net gain of two ATP molecules that occurs in the glycolysis process. It is the same for both lactic acid fermentation and alcoholic fermentation.
Question 4
1 / -0

The energy releasing process in which the substrate is oxidized without an external electron acceptor is called

A
Aerobic respiration

B
Glycolysis

C
Fermentation

D
Photorespiration
Solution
- Fermentation is an energy-releasing process in which substrates like sugar is oxidized into organic acids or alcohol without an external electron acceptor.
- The final electron acceptor is either acetaldehyde or pyruvate.
- Aerobic respiration is a process in which energy is produced in the presence of oxygen.
- Glycolysis is a process of converting glucose into two molecules of pyruvate.
- Photorespiration is a process in which the RuBisCO enzyme oxygenates RuBP by wasting some amount of energy.
Thus, the correct answer is option C.
Question 5
1 / -0

During anaerobic respiration in yeast

A
Water and $$CO_{2}$$ are end products

B
$$CO_2,C_{2}H_{5}OH$$ and energy are end products

C
$$H_{2}S,C_{6}H_{12}O_{6}$$ and energy are the end products

D
$$H_{2}O,CO_{2}$$ and energy are the only end products
Solution
1. Anaerobic respiration is the respiration which occurs in the absence of oxygen. It is carried out by yeast and some bacteria. In this, glucose breaks down into pyruvates in absence of oxygen.
  Glucose breaks down into ethanol, carbon dioxide and gives two molecules of ATP.
  $$C_6H_{12}O_6$$→ $$C_2H_5OH$$+ $$CO_2$$
Hence the correct option is ' $$CO_2$$, $$C_2H_5OH$$ and energy are end products'.
Question 6
1 / -0

Fermentation is represented by the equation

A
$$C_{6}H_{12}O_{6}+6O_{2}\rightarrow 6CO_{2}+6H_{2}O+673$$k cal

B
$$C_{6}H_{12}O_{6}\rightarrow 2C_{2}H_{5}OH+2CO_{2}+18k$$ cal

C
$$6CO_{2}+12H_{2}O\rightarrow C_{6}H_{12}O_{6}+6H_{2}O+6O_{2}$$

D
$$6CO_{2}+6H_{2}O\rightarrow C_{6}H_{12}O_{6}+6O_{2}$$
Solution
- Fermentation is a metabolic process, that converts sugar to acids, gases and alcohol.
- It occurs in yeast and bacteria, but also in oxygen-starved muscle cells, as in the case of lactic acid fermentation.
- It could be represented by the equation for alcoholic fermentation:
$$C_6H_{12}O_6$$ --------> 2$$C_2H_5OH$$ + 2$$CO_2$$ + 18k ca
Question 7
1 / -0

Pasteur effect is concerned with the shifting of environmental conditions from

A
Light to dark

B
Aerobic to anaerobic

C
Anaerobic to aerobic

D
Light to anaerobic

Solution

Pasteur effect is the shifting of environmental conditions from anaerobic to aerobic. It is otherwise defined as an inhibiting effect of oxygen on the fermentation process.
Question 8
1 / -0

Products of fermentation are

A
Alcohol and lipoprotein

B
Ether and nucleic acid

C
Protein and nucleic acid

D
Alcohol and lactic acid

Solution

In biology, the term anaerobic respiration means a way for a life form to generate usable energy without utilization of oxygen. So, in brief, it is respiration without oxygen. As a result of this process, alcohol, lactic acid and similar compounds are produced.
Question 9
1 / -0

Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzymes

A
Carboxylase

B
Dehydrogenase

C
Decarboxylase and dehydrogenase

D
Phosphate
Solution
- Under anaerobic conditions, pyruvic acid is either converted to lactate in lactate fermentation or ethanol in alcohol fermentation.
- During alcohol fermentation, pyruvic acid is first converted to acetaldehyde in presence of the enzyme pyruvate decarboxylase.
- The acetaldehyde is then converted into ethyl alcohol by the enzyme alcohol dehydrogenase.
Thus, the correct answer is option C.
Question 10
1 / -0

In fermentation, Yeast secrete which one of the following enzyme?

A
Invertase

B
Zymase

C
Dehydrogenase

D
Anolase

Solution

Zymase is an enzyme complex, that catalyses the fermentation of sugar into ethanol and carbon dioxide. It occurs naturally in Yeasts.
So, the correct answer is option B.

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Re-Attempt Weekly Quiz Competition

Respiration in Plants Test - 18

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Respiration in Plants Test - 18

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SHARING IS CARING

Question 1

1

< 1

> 1

0

Solution

Question 2

Fructose and water

Glucose and $$CO_{2}$$

Alcohol and $$CO_{2}$$

Water and $$CO_{2}$$

Solution

Question 3

2

4

3

5

Solution

Question 4

Aerobic respiration

Glycolysis

Fermentation

Photorespiration

Solution

Question 5

Water and $$CO_{2}$$ are end products

$$CO_2,C_{2}H_{5}OH$$ and energy are end products

$$H_{2}S,C_{6}H_{12}O_{6}$$ and energy are the end products

$$H_{2}O,CO_{2}$$ and energy are the only end products

Solution

Question 6

$$C_{6}H_{12}O_{6}+6O_{2}\rightarrow 6CO_{2}+6H_{2}O+673$$k cal

$$C_{6}H_{12}O_{6}\rightarrow 2C_{2}H_{5}OH+2CO_{2}+18k$$ cal

$$6CO_{2}+12H_{2}O\rightarrow C_{6}H_{12}O_{6}+6H_{2}O+6O_{2}$$

$$6CO_{2}+6H_{2}O\rightarrow C_{6}H_{12}O_{6}+6O_{2}$$

Solution

Question 7

Light to dark

Aerobic to anaerobic

Anaerobic to aerobic

Light to anaerobic

Solution

Question 8

Alcohol and lipoprotein

Ether and nucleic acid

Protein and nucleic acid

Alcohol and lactic acid

Solution

Question 9

Carboxylase

Dehydrogenase

Decarboxylase and dehydrogenase

Phosphate

Solution

Question 10

Invertase

Zymase

Dehydrogenase

Anolase

Solution

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