Life Processes Test

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Life Processes Test - 77

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Weekly Quiz Competition

Question 1
1 / -0

Site of actual diffusion of $$O_{2}$$ and $$CO_{2}$$ is ______________.

A
Conduction part

B
Exchange part

C
Inhaling part

D
Both A and B
Solution
- Breathing is the process by which atmospheric air is drawn in and CO2 rich alveolar air is released out. All the organs involved in breathing are the inhaling part of the respiratory system.
- The conducting part transports the atmospheric air up to the alveoli.
- The exchange part is the site of the actual diffusion of O$$_2$$ and CO$$_2$$ between blood and atmospheric air i.e the alveolar membrane.
So, the correct answer is option B.
Question 2
1 / -0

Consider the following statements:
1. The force that blood exerts force against the wall of a vessel is called blood pressure.
2. The pressure of blood inside the artery during contraction is called systolic pressure and pressure in an artery during relaxation is called diastolic pressure.
3. Blood pressure is measured with an instrument called sphygmomanometer.
Which of the statements given above are correct?

A
1 and 2

B
1 and 3

C
2 and 3

D
All of the above

Solution

Blood pressure is the force of the flowing blood against the artery walls. Systolic pressure is the pressure generated during the contraction of the left ventricle. Diastolic pressure is the pressure during the relaxation of the left ventricle. A sphygmomanometer is a device used to measure blood pressure.
So, the correct answer is option D.
Question 3
1 / -0

Arrange the following events in correct sequence, starting immediately after deoxygenated blood has entered in the heart.
1. Right atrium contracts
2. Semilunar valves open
3. Right ventricle contracts
4. Tricuspid valves close

A
1 $$\rightarrow$$ 3 $$\rightarrow$$ 4 $$\rightarrow$$ 2

B
1 $$\rightarrow$$ 4 $$\rightarrow$$ 3 $$\rightarrow$$ 2

C
4 $$\rightarrow$$ 1 $$\rightarrow$$ 3 $$\rightarrow$$ 2

D
4 $$\rightarrow$$ 3 $$\rightarrow$$ 1 $$\rightarrow$$ 2
Question 4
1 / -0

The two lower chambers of the heart are called ________.

A
Atria

B
Ventricles

C
Valves

D
Pulmonary chambers

E
Sockets

Solution

The two lower chambers of the heart are called ventricles. The two ventricles are the left ventricle and the right ventricle. The upper chambers are called the atria (right atrium and left atrium)
Hence, the correct answer is option B.
Question 5
1 / -0

Choose the correct alternative in the following statements.
Pulmonary vein carries:

A
Oxygenated blood

B
Deoxygenated blood

C
Glucose-rich blood

D
$$CO_2$$ laden blood

Solution

The pulmonary vein carries oxygenated blood from the lungs back to the left atrium of the heart. It is the part of the pulmonary circulation.
Hence, the correct answer is 'Oxygenated blood'.
Question 6
1 / -0

Read the following statements:
(A) Nasal chamber opens into the nasopharynx which is a portion of the pharynx.
(B) Larynx produces sound during inspiration as well as expiration.
(C) During swallowing gullet can be covered by a thin elastic cartilaginous flap called epiglottis.
(D) Trachea is get divided at the level of the 6th thoracic vertebra into right and left primary bronchi..
(E) The branching network of bronchi, bronchioles, and alveoli comprise the lungs.
How many statements are not correct?

A
2

B
3

C
4

D
1

Solution

A) Nasal chamber opens into the nasopharynx which is a portion of the pharynx – True because It also connects the nasal system of air chambers and the upper end of the trachea.

B) Larynx produces sound during inspiration as well as expiration – True, because, the larynx commonly called the voice box, is an organ in the top of the neck of tetrapods involved in breathing, producing sound.

C) During swallowing, the gullet can be covered by a thin elastic cartilaginous flap called Epiglottis – False, because, the epiglottis is a flap in the throat that keeps food from entering the windpipe and the lungs.

D) The trachea is get divided at the level of the 6th thoracic vertebra into right and left primary bronchi – False, because the trachea, commonly called the windpipe, is the main airway to the lungs It divides into the right and left bronchi at the level of the fifth thoracic vertebra, channeling air to the right or left lung.

E) The branching network of bronchi, bronchioles, and alveoli comprise the lungs – True.
So, the correct answer is option A.
Question 7
1 / -0

The specific function of light energy in the process of photosynthesis is to:

A
Reduce carbon dioxide

B
Synthesize glucose

C
Activate chlorophyll

D
Split water molecule
Question 8
1 / -0

During photosynthesis, the oxygen in glucose comes from

A
$$CO_2$$

B
Water

C
Both $$CO_2$$ and water

D
Oxygen via air
Solution
Explanation:
Photosynthesis is a series of reactions in which organic compounds are formed utilising $$CO_2$$, sunlight and water.
The carbon dioxide is reduced to glucose.
$$CO_2$$ is fixed during the carbon fixation cycle yielding glucose.
In the process, oxygen is also formed by the oxidation of water.
It is an anabolic process.
Question 9
1 / -0

Which one chemical reaction occurs during photosynthesis?

A
Carbon dioxide is reduced and water is oxidised.

B
Water is reduced and carbon dioxide is oxidised.

C
Both carbon dioxide and water are oxidised.

D
Both carbon dioxide and water are reduced.
Solution
- Photosynthesis is the process of preparing food in the presence of sunlight and chlorophyll.
- In this process, the plant uses water from the soil, carbon dioxide from the air.
Carbon dioxide + Water + light energy $$\rightarrow$$ Glucose + Oxygen
- It occurs in green plants, certain algae, blue-green algae and bacteria.
- During this process, carbon dioxide is reduced into glucose while water is oxidized as it is split to release electrons, protons and atomic oxygen.
So, the correct answer is option A.
Question 10
1 / -0

Choose the correct answers from the alternatives given.
With regard to natural eating habits, a human is:

A
An herbivore

B
A carnivore

C
An omnivore

D
A granivore

Solution

(A)Herbivore is an organism that feeds on grass or plant product
(B)Carnivore is an organism that feeds on meat and its product
(C)Omnivore is an organism that feeds on both plant product and meat
(D)Granivore is an organism that feeds on grains
So, the correct answer is 'An omnivore'

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Re-Attempt Weekly Quiz Competition

Life Processes Test - 77

Result

Life Processes Test - 77

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SHARING IS CARING

Question 1

Conduction part

Exchange part

Inhaling part

Both A and B

Solution

Question 2

1 and 2

1 and 3

2 and 3

All of the above

Solution

Question 3

1 $$\rightarrow$$ 3 $$\rightarrow$$ 4 $$\rightarrow$$ 2

1 $$\rightarrow$$ 4 $$\rightarrow$$ 3 $$\rightarrow$$ 2

4 $$\rightarrow$$ 1 $$\rightarrow$$ 3 $$\rightarrow$$ 2

4 $$\rightarrow$$ 3 $$\rightarrow$$ 1 $$\rightarrow$$ 2

Question 4

Atria

Ventricles

Valves

Pulmonary chambers

Sockets

Solution

Question 5

Oxygenated blood

Deoxygenated blood

Glucose-rich blood

$$CO_2$$ laden blood

Solution

Question 6

2

3

4

1

Solution

Question 7

Reduce carbon dioxide

Synthesize glucose

Activate chlorophyll

Split water molecule

Question 8

$$CO_2$$

Water

Both $$CO_2$$ and water

Oxygen via air

Solution

Question 9

Carbon dioxide is reduced and water is oxidised.

Water is reduced and carbon dioxide is oxidised.

Both carbon dioxide and water are oxidised.

Both carbon dioxide and water are reduced.

Solution

Question 10

An herbivore

A carnivore

An omnivore

A granivore

Solution

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