Cellular Respiration

Q.

Why oxygen is important for cellular respiration?

Q.

What is pyruvate

Q.

How does oxygen enter the blood from the lungs? [1 MARK]

Q.

How do cells derive energy from the food we eat?

Q.

Which gas is used during the process of aerobic cellular respiration?

1. Carbon dioxide
2. Nitrogen
3. Carbon monoxide
4. Oxygen

Q. Every organism needs food. Does a cell do it? Explain briefly.

Q.

Oxygen is absorbed into the blood from which of the following parts of the respiratory system?

1. Alveoli

2. Nose

3. Bronchi

4. Trachea

Q.

Cellular respiration is carried out by:

1. Ribosomes

2. Mitochondria

3. Chloroplast

4. Golgi bodies

Q.

The end products of anaerobic respiration are ______ (alcohol/water) and ______ (oxygen/energy)

Q. Which of the following gases has the highest affinity to bind with haemoglobin?

1. Carbon dioxide
2. Carbon monoxide
3. Nitrogen
4. Oxygen

Q.

Select the correct statements regarding anaerobic respiration.

1. Oxygen is absent when this form of respiration takes place.

2. Lower organisms such as bacteria and yeast use this type of respiration.

3. Oxygen is present when this form of respiration takes place.

4. Anaerobic respiration release more energy than aerobic respiration.

Q.

Give one word for gas evolved during respiration.

Q. Define breathing. Explain the mechanism of breathing in human beings.

Q.

Where does the exchange of gases take place in the respiratory system?

1. Diaphragm

2. Alveoli

3. Trachea

4. Pharynx

Q.

How is oxygen circulated to the body?

Q. Describe various pathways of glucose break down in organisms.

Q.

The respiration that takes place in the presence of oxygen is respiration.

Q. What are the total number of ATP molecules generated at the end of every respiration cycle in each cell?

1. 36
2. 46
3. 38
4. 32

Q.

What does ATP molecules produced by mitochondria consist of ?

Q.

Where does oxygen used in cellular respiration end up?

Q.

Accumulation of __ takes place due to which we get cramps in our legs or arms during exercises.

1. carbon dioxide

2. oxygen

3. water

4. lactic acid

Q. Assertion[A]: A person sleeping under the tree during night time feels lethargic when he wakes up in the morning.

Reason[R]: He has inhaled excess oxygen given out by trees.

1. A is true and R is false.
2. R is true and A is false.
3. Both A and R are true and R is the correct explanation for A.
4. Both A and R are true but R is not the correct explanation for A.

Q. Explain respiratory system of human.

Q.

The main aim of cellular respiration is to produce energy.

The molecule that enters the process of cellular respiration is

1. glucose

2. protein

3. starch

4. fat

Q.

In the process of respiration, …………is produced as a waste product.(oxygen/carbon dioxide).

Q.

Why is gas exchange vital?

Q. What are respiratory substances? Name the most common respiratory substrate.

Q. The complete conversion of glucose in the presence of oxygen into carbon dioxide and water with release of energy is called

1. Aerobic respiration
2. Anaerobic respiration
3. Glycolysis
4. Hydrolysis

Q. Respiration in human beings is

1. Aerobic
2. An aerobic
3. Circulatory
4. None of the above

Q. How does respiration fulfil the energy requirement of an organism?