Anaerobic Respiration

Q. What number of ATP is produced when a molecule of glucose undergoes fermentation?

1. 2
2. 36
3. 38
4. 4

Q.

What is the significance of step-wise release of energy in respiration?

Q. Fermentation is the anaerobic production of

1. protein and acetic acid
   
2. ethers and acetones
3. alcohol and lipoproteins
4. alcohol, lactic acid or similar compounds
   

Q. Assertion: Yeasts, such as Saccharomyces Cerivisiae are used in baking industry.
Reason: Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.

1. Both assertion and reason are true and reason is the correct explanation for assertion
2. Both reason and assertion are true but reason is not correct explanation for assertion
3. Assertion is true but reason is false
4. Assertion is true but reason is false

Q.

A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too.

(a) Why did the dough rise?

(b) Why did the dough smell sour?

(c) Why was sugar added to the dough?

(d) What would have happened if the dough was kept in the refrigerator, soon after it was prepared?

Q.

Lack of oxygen in muscles often leads to cramps among cricketers. This results due to the ___________.

1. Conversion of pyruvate to ethanol

2. Conversion of pyruvate to glucose

3. Non-conversion of glucose to pyruvate

4. Conversion of pyruvate to lactic acid

Q. Terminal electron acceptors in lactic acid fermentation and ethanol fermentation, respectively are

1. pyruvate and acetaldehyde
2. acetaldehyde and pyruvate
3. oxygen and pyruvate
4. oxygen and acetaldehyde

Q.

Why is sugar solution used in the experiment to keep yeast cells?

Q. Conversion of pyruvic acid into ethyl alcohol is mediated by

1. phosphatase
2. dehydrogenase
3. decarboxylase and dehydrogenase
4. catalase

Q.

In the following flow chart, replace the symbols a, b, c and d with appropriate terms. Briefly explain the process and give any two application of it,

Q.

Is pyruvate oxidation, aerobic or anaerobic?

Q. Drugs like LSD, barbiturates, amphetamines, etc., are used as medicines to help patients with mental illness. However, excessive doses and abusive usage are harmful. Enumerate the major adverse effects of such drugs in humans.

Q.

Fermentation is an:

1. Exothermic reaction

2. Endothermic reaction

3. Reversible reaction

4. None of these

Q. What are the products of ethyl alcohol fermentation?

1. $C{O}_2,H_{2}O,\text{energy}$
2. $C{O}_2,\text{ethanol},\text{energy}$
3. Lactic acid, energy
4. None of these

Q.

Q. Dough kept overnight in warm weather becomes soft and spongy because of _____.

1. Absorption of carbon dioxide from atmosphere
2. Fermentation
3. Cohesion
4. Osmosis

Q.

The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Why is there anaerobic respiration even in organisms that live in aerobic condition like human beings and angiosperms?

Q. Which of the following conditions is not linked to deficiency of thyroid hormone

1. Goitre
2. Exophthalmia
3. Myxedema
4. Cretinism

Q. After glycolysis, the first step of ethyl alcohol fermentation requires

1. FAD reduction
2. $M{n}^{+2}$ acceptance
3. dehydrogenation
4. decarboxylation

Q. During alcoholic fermentation of yeast, two molecules of glucose produce

1. 6 molecules of ethanol + 6 molecules of ${\mathrm{CO}}_2$
2. 3 molecules of ethanol + 3 molecules of ${\mathrm{CO}}_2$
3. 4 molecules of ethanol + 4 molecules of ${\mathrm{CO}}_2$
4. 2 molecules of ethanol + 2 molecules of ${\mathrm{CO}}_2$

Q.

How is ethanol prepared by the fermentation process?

Q.

What happens during lactic acid fermentation?

Q.

What are the three types of fermentation?

Q.

Respiratory coefficient is -

1. The amount of O₂ obtained to the amount of O₂ consumed.

2. Always more than 1.

3. The amount of CO₂ produced to the amount of O₂ absorbed.

4. Always less than 1.

Q. 2 $NADH\left(H^{+}\right)$ produced during anaerobic glycolysis yield

1. 6 ATP molecules
2. 64 ATP molecules
3. 8 ATP molecules
4. None of these

Q. What is incorrect about anaerobic respiration?

1. Partial breakdown of glucose
2. Net gain of 2ATP
3. Rapid oxidation of NADH
4. Reduction of pyruvic acid

Q. During strenuous exercise, the reducing agent of pyruvic acid is

1. FAD
2. NADH and a hydrogen ion
3. A hydrogen ion
4. NADP

Q. The incomplete breakdown of sugars in anaerobic respiration (alcoholic fermentation) results in the formation of

1. Glucose and ${\mathrm{CO}}_2$
2. Fructose and water
3. Water and ${\mathrm{CO}}_2$
4. Alcohol and ${\mathrm{CO}}_2$

Q.

The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Explain.

Q.

Do lactic acid bacteria produce gas?