Life Processes Test

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Life Processes Test - 74

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Weekly Quiz Competition

Question 1
1 / -0

Amount of saliva secreted per day is

A
250 ml

B
500 ml

C
750 ml

D
1000 ml

Solution

The normal daily production of saliva varies between 0.5-1.5 liters. The whole unstimulated saliva flow rate is approximately 0.3-0.4 ml/min. This rate decreases to 0.1 ml/min during sleep and increases to about 4 ml/min during eating, chewing and other stimulating actvities.
So, option D is the correct option.
Question 2
1 / -0

Saliva contains enzyme:

A
Enterokinase

B
Ptyalin/amylase

C
Chymotrypsin

D
Lipase

Solution

A.Correct Option B
B.Explanation for correct option:
Saliva contains amylase / ptyalin enzyme which breaks down the starch into sugar . Sugar is easily absorbed by the body .
Amylase is responsible for the breaking of the bonds in starches, polysaccharides, and complex carbohydrates into easier to absorb simple sugars.
Question 3
1 / -0

Dialysis fluid contains all the constituents as in plasma except:

A
Electrolytes

B
Proteins

C
Nitrogenous wastes

D
All the above

Solution

The process of filtering the blood using artificial kidney is known as dialysis. It is a method of removing excess water, nitrogenous wastes (urea) and toxins from the blood in the patient. It is also called renal replacement therapy. Dialysis fluid contains all constituents as in plasma except the nitrogenous waste (Urea).
So, the correct answer is 'Nitrogenous waste'.
Question 4
1 / -0

Semidigested food that moves down oesophagus is known as

A
Bolus

B
Chyme

C
Rugae

D
Protein

Solution

Food is broken down into smaller pieces in the mouth by chewing. This is an example of mechanical digestion. The teeth cut and crush food, and the pieces are mixed with saliva to form a ball of food called a bolus. This is then swallowed and is carried down the oesophagus by peristalsis.
Hence the correct answer is (A)
Question 5
1 / -0

The digestive enzymes secreted in the food vacuole of Paramoecium helps in:

A
Locomotion

B
Engulfment of food particle

C
Digestion of complex food material into simpler ones

D
Excretion of the digested food

Solution

Food vacuoles circulate in the cytoplasm by streaming movements. The prey can be killed and digested with the help of digestive enzymes secreted in the food vacuole. The diffusible substances resulting from the process of digestion are utilized in synthesizing more protoplasm. They are also stored as reserved food.
So, the correct option is 'C'.
Question 6
1 / -0

Arrange the stages of nutrition of amoeba.
a) Ingestion
b) Engulfment
c) Digestion
d) Excretion
e) Absorption

A
b,a,c,e,d

B
a,b,c,e,d

C
b,a,c,d,e

D
c,d,a,b,e

Solution

The stages of nutrition in amoeba are:-
Engulfment- Ingestion- Digestion- Absorption- Excretion.
So, the correct option is 'b,a,c,e,d'.
Question 7
1 / -0

The mode of nutrition in amoeba is:

A
Heterotrophic

B
Autotrophic

C
Cannot be determined

D
None of the above

Solution

An amoeba is a single-celled microscopic protozoan. The mode of nutrition in amoeba is heterotrophic. Amoeba cannot produce food on their own.
So, the correct option is A.
Question 8
1 / -0

The engulfment of food in amoeba is known as

A
Excretion

B
Phagocytosis

C
Respiration

D
All of the above

Solution

Amoebas take in nutrients via phagocytosis and pinocytosis. Phagocytosis is what occurs when an amoeba surrounds a solid food particle with its pseudopods to form a vacuole (known as a phagosome) in which digestion of the food particle then occurs.
So, the correct option is 'Phagocytosis'.
Question 9
1 / -0

Which of the following structures helps in the release of excretory gases in plants?

A
Root hair

B
Stomata

C
Lenticels

D
Both B and C

Solution

Plants produce two gaseous waste products i.e. oxygen during the process of photosynthesis and carbon dioxide during the process of respiration. They do not have any special organ for the removal of their waste products. These waste products are removed and released in the air through stomata in leaves and lenticels in stems.
Hence, the correct answer is option D.

Question 10

1 / -0

Match the column.

	Column I		Column II
a	Superior Vena Cava	p	Carries deoxygenated blood to lungs
b	Inferior Vena Cava	q	Carries oxygenated blood from lungs
c	Pulmonary Artery	r	Brings deoxygenated blood from lower parts of body to right atrium
d	Pulmonary vein	t	Brings deoxygenated blood from upper parts of body into right atrium

a - q, b - t, c - r, d - p

a - t, b - p, c - q, d - r

a - t, b - r, c - p, d - q

a - t, b - p, c - r, d - q

Solution

a. Superior vena cava brings deoxygenated blood from upper parts of body (head and neck) to right atrium.

b. Inferior vena cava brings deoxygenated blood from lower parts of the body (pelvis, lower limbs, gonads, muscles of back, kidneys, liver etc.) to right atrium.

c. Pulmonary artery carries deoxygenated blood from the right ventricle to the lungs.

d. Pulmonary vein carries oxygenated blood from the lungs to the left auricle.

So, the correct answer is 'a - t, b - r, c - p, d - q'.

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Re-Attempt Weekly Quiz Competition

Life Processes Test - 74

Result

Life Processes Test - 74

Score

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Rank

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SHARING IS CARING

Question 1

250 ml

500 ml

750 ml

1000 ml

Solution

Question 2

Enterokinase

Ptyalin/amylase

Chymotrypsin

Lipase

Solution

Question 3

Electrolytes

Proteins

Nitrogenous wastes

All the above

Solution

Question 4

Bolus

Chyme

Rugae

Protein

Solution

Question 5

Locomotion

Engulfment of food particle

Digestion of complex food material into simpler ones

Excretion of the digested food

Solution

Question 6

b,a,c,e,d

a,b,c,e,d

b,a,c,d,e

c,d,a,b,e

Solution

Question 7

Heterotrophic

Autotrophic

Cannot be determined

None of the above

Solution

Question 8

Excretion

Phagocytosis

Respiration

All of the above

Solution

Question 9

Root hair

Stomata

Lenticels

Both B and C

Solution

Question 10

a - q, b - t, c - r, d - p

a - t, b - p, c - q, d - r

a - t, b - r, c - p, d - q

a - t, b - p, c - r, d - q

Solution

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