Respiration in Plants Test

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Respiration in Plants Test - 68

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Weekly Quiz Competition

Question 1
1 / -0

Enzyme required to oxidise acetaldehyde is

A
Ethanol oxidase

B
Acetaldehyde dehydrogenase

C
Alcohol hydrogenase

D
Glyceraldehyde dehyadrogenase

Solution

Acetaldehyde dehydrogenase enzyme oxidises acetaldehyde into acetate. This enzyme belongs to class of aldehyde dehydrogenases. Acetaldehyde is produced from the metabolism of alcohol by the enzyme alcoholic dehydrogenase. Acetaldehyde is toxic and its accumulation can lead to effects of hangover so it needs to be metabolized. It is converted into acetate by aldehyde dehydrogenase. Acetate is then converted into carbon dioxide and water. These metabolic reactions occur in liver.
So, the correct answer is 'Acetaldehyde dehydrogenase'.
Question 2
1 / -0

During fermentation by yeast, alcohol is formed from

A
Proteins

B
Sugars

C
Mucopolysaccharides

D
Fats

Solution

Alcohol is formed from the fermentation of sucrose or any other sugar source by $$Saccharomyces\ cerevisiae$$ (yeast).
So the correct answer is 'Sugars'
Question 3
1 / -0

Dinitrophenol inhibits cell function by disrupting ________________.

A
Citric acid cycle

B
Oxidative phosphorylation

C
Glycolysis

D
Gluconeogenesis

Solution

The increase in the concentrations of dinitrophenol, reduced oxidative phosphorylation, which results in a deficiency of ATP. As ATP is required in citric acid production, citric acid output is decreased.
So, the correct option is 'A'.
Question 4
1 / -0

The citric acid cycle _________________.

A
Contains intermediates for amino acid synthesis

B
Generates fewer molecules of ATP than glycolysis

C
Is an anaerobic process

D
Is the major anabolic pathway for glucose synthesis
Question 5
1 / -0

Ethyl alcohol fermentation can be observed in

A
Rhizopus

B
Lactobacillus

C
Mesophyll cell

D
RBC

Solution

While Saccharomyces cerevisiae is the most important source of industrial alcohol, R. stolonifer and other species of Rhizopus also produce ethyl alcohol which is the most important fermentation product.

So, the correct answer is 'Rhizopus'.
Question 6
1 / -0

Among the following substances, which one has the highest Respiratory Quotient?

A
Glucose

B
Malic acid

C
Oxalic acid

D
Palmitic acid
Question 7
1 / -0

Which one is the positive modulator of glycolysis?

A
$$ATP$$

B
$$ADP$$

C
$$NADH$$

D
$$FADH$$

Solution

ADP is the positive modulator of glycolysis. It activates an enzyme called phosphofructokinase (PFK-1) which speeds up the formation of end products. So, the correct answer is option B.
Question 8
1 / -0

Enzyme that changes glucose to ethyl alcohol is

A
Zymase

B
Diastase

C
Invertase

D
Maltase

Solution

A) Zymase causes the breakdown of sugars into alcohols.
B) Diastase catalyses the breakdown of starch into maltose.
C) Invertase is an enzyme that catalyses the breakdown of sucrose into fructose and glucose.
D) Maltase breaks down maltose to glucose.
So the correct answer is 'Zymase'
Question 9
1 / -0

In the first step glycolysis, the phosphorylation of glucose is coupled to _______________.

A
The reduction of NAD$$+$$

B
The synthesis of ATP

C
The hydrolysis of ATP

D
The loss of electron
Question 10
1 / -0

Each molecule of pyruvic acid entering the Krebs cycle produces?

A
2 molecules of $$CO_{2}$$.

B
3 molecules of $$CO_{2}$$.

C
1 molecules of $$CO_{2}$$.

D
5 molecules of $$CO_{2}$$.

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Re-Attempt Weekly Quiz Competition

Respiration in Plants Test - 68

Result

Respiration in Plants Test - 68

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SHARING IS CARING

Question 1

Ethanol oxidase

Acetaldehyde dehydrogenase

Alcohol hydrogenase

Glyceraldehyde dehyadrogenase

Solution

Question 2

Proteins

Sugars

Mucopolysaccharides

Fats

Solution

Question 3

Citric acid cycle

Oxidative phosphorylation

Glycolysis

Gluconeogenesis

Solution

Question 4

Contains intermediates for amino acid synthesis

Generates fewer molecules of ATP than glycolysis

Is an anaerobic process

Is the major anabolic pathway for glucose synthesis

Question 5

Rhizopus

Lactobacillus

Mesophyll cell

RBC

Solution

Question 6

Glucose

Malic acid

Oxalic acid

Palmitic acid

Question 7

$$ATP$$

$$ADP$$

$$NADH$$

$$FADH$$

Solution

Question 8

Zymase

Diastase

Invertase

Maltase

Solution

Question 9

The reduction of NAD$$+$$

The synthesis of ATP

The hydrolysis of ATP

The loss of electron

Question 10

2 molecules of $$CO_{2}$$.

3 molecules of $$CO_{2}$$.

1 molecules of $$CO_{2}$$.

5 molecules of $$CO_{2}$$.

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My Perfomance

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