Life Processes Test

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Life Processes Test - 85

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Weekly Quiz Competition

Question 1
1 / -0

Blood is purified in:

A
Heart

B
Lungs

C
Liver

D
Kidneys

Solution

Blood is purified or Oxygenated in the lungs. The right ventricle pumps deoxygenated blood through the pulmonary arteries into the lung for oxygenation or purification.
So, the correct answer is 'Lungs'
Question 2
1 / -0

What is the source of Oxygen, liberated in photosynthesis?

A
$$H_{2}O$$

B
$$CO_{2}$$

C
$$H_{2}O$$ and $$CO_{2}$$ both

D
Neither $$O_{2} $$ nor $$ CO_{2}$$

Solution

6CO2 + 6H2O + energy --> C6H12O6+ 6O2;
Water is the source of oxygen in photosynthesis.
Option 'A' is correct.
Question 3
1 / -0

Consider the following two statements A & B and select the correct option.
A. Small intestine is shorter than large intestine.
B. Small intestine is wider than large intestine.

A
Both the statements are correct.

B
Both the statements are wrong.

C
Statement A is correct, B is wrong.

D
Statement B is correct, A is wrong.

Solution

The small intestine is longer than the large intestine. It is about 7 metres long while the large intestine is about 1.5 meters long. The large intestine is wider than the small intestine.
So, the correct answer is option B.
Question 4
1 / -0

Select correct statement for photosynthesis?

A
$$CO$$ and $$H_{2}O$$ are oxidised

B
$$CO_{2}$$ and $$H_{2}O$$ are reduced

C
$$H_{2}O$$ is reduced and $$CO_{2} $$ is oxidised

D
$$H_{2}O$$ is oxidised and $$CO_{2} $$ is reduced
Question 5
1 / -0

Why do we need to remove the by-products formed by chemical reactions that use the carbon source and the oxygen for energy generation?

A
They are useless by the cells of the body.

B
They can be toxic.

C
Both A and B

D
None of the above

Solution

The by-products formed in the body have to be removed because neither they are of any use to the body, nor are harmless, thus waste by-products are needed to be removed from the body and discarded outside by a process called excretion.
The correct option is C.
Question 6
1 / -0

Which of the following organ is majorly involved in digestion?

A
Throat

B
Stomach

C
Tongue

D
Nose
Question 7
1 / -0

Fill in the blank:
Oxidising-reducing reactions are some of the most common chemical means to _______________.

A
Breakdown molecules

B
Buildup molecules

C
Stabilize molecules

D
Generate molecules

Solution

Oxidising-reducing reactions help to break down complex molecules into simpler substances. The process of acquiring oxygen from outside the body, and to use it in the process of break-down of food sources for cellular needs, is what we call respiration.
The correct option is A.
Question 8
1 / -0

The vessels which are made up of special cells are called_______.

A
Vascular Tissue

B
Dispersed Tissue

C
Personalized Tissue

D
Temporary Tissue
Solution
- The Plant vessels are made of special cells, forming the vascular tissue. These tissues are a group of cells that perform specialised function in an organism.
- Xylem and phloem are the vascular tissues which transport substances in plants.
- Thus, Option A is correct.
Question 9
1 / -0

What is a function of mucus in the respiratory system?

A
It carries hormones

B
It signals phagocytes

C
It traps pathogens

D
It causes diseases

Solution

Bronchi are the main passageway into the lungs, formed from the trachea. They are hollow tubes surrounded by cartilage rings. They are lined with cilia and mucus-secreting cells. Mucus traps pathogens and prevents their entry into the lungs.
Question 10
1 / -0

Why does absorption of digested food occur mainly in the small intestine?

A
Digestion is completed in small intestine

B
Presence of villi

C
Wall of intestine is richly supplied with blood vessels

D
All of the above
Solution
- The small intestine is the most important part of the digestive system.
- Maximum absorption occurs in the small intestine because of the following reasons;
(a) Digestion is completed in the small intestine.
(b) The inner lining of the small intestine is provided with villi which increase the surface area for absorption of digested food.
(c) Wall of the intestine is richly supplied with blood vessels which help in assimilation of the absorbed food to the other parts of the body.
Therefore, the correct answer is option D.

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Re-Attempt Weekly Quiz Competition

Life Processes Test - 85

Result

Life Processes Test - 85

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SHARING IS CARING

Question 1

Heart

Lungs

Liver

Kidneys

Solution

Question 2

$$H_{2}O$$

$$CO_{2}$$

$$H_{2}O$$ and $$CO_{2}$$ both

Neither $$O_{2} $$ nor $$ CO_{2}$$

Solution

Question 3

Both the statements are correct.

Both the statements are wrong.

Statement A is correct, B is wrong.

Statement B is correct, A is wrong.

Solution

Question 4

$$CO$$ and $$H_{2}O$$ are oxidised

$$CO_{2}$$ and $$H_{2}O$$ are reduced

$$H_{2}O$$ is reduced and $$CO_{2} $$ is oxidised

$$H_{2}O$$ is oxidised and $$CO_{2} $$ is reduced

Question 5

They are useless by the cells of the body.

They can be toxic.

Both A and B

None of the above

Solution

Question 6

Throat

Stomach

Tongue

Nose

Question 7

Breakdown molecules

Buildup molecules

Stabilize molecules

Generate molecules

Solution

Question 8

Vascular Tissue

Dispersed Tissue

Personalized Tissue

Temporary Tissue

Solution

Question 9

It carries hormones

It signals phagocytes

It traps pathogens

It causes diseases

Solution

Question 10

Digestion is completed in small intestine

Presence of villi

Wall of intestine is richly supplied with blood vessels

All of the above

Solution

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