Life Processes Test

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Life Processes Test - 83

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Weekly Quiz Competition

Question 1
1 / -0

Oxygen liberated during photosynthesis comes from?

A
Water

B
Carbon dioxide

C
Sunlight

D
Chlorophyll
Question 2
1 / -0

Desert plants take up $$CO_2$$ during _____ .

A
Early morning

B
Evening

C
Night

D
Afternoon
Solution
- Desert plants have a special mechanism known as CAM metabolism (Crassulacean acid metabolism).
- During day the stomata are closed to conserve water molecules. At nights, the Carbon dioxide is converted to an acid and stored.
- This acid is then utilized by plants during photosynthesis at day time.
Hence, Desert plants like cactus and agaves take up $$CO_2$$ at night time.
Option 'C' is correct.
Question 3
1 / -0

Incomplete double circulations is found in:

A
reptiles and birds

B
Amphibia and reptiles

C
Birds and mammals

D
Fish and amphibia

Solution

The correct answer is B (Amphibians and reptiles )
In amphibians and reptiles the auricles are two in number and divided into right and left auricles, but ventricle is only one and when blood reaches the ventricle both the oxygenated and deoxygenated blood get mixed up.
This is called as incomplete double circulation.
Question 4
1 / -0

_______ is a major cation in blood plasma of vertebrates.

A
Sodium

B
Potassium

C
Calcium

D
Magnesium
Question 5
1 / -0

Which of the following is the equation for aerobic respiration in humans?

A
Glucose $$\rightarrow$$ Alcohol $$+$$ Energy

B
Glucose $$\rightarrow$$ Lactic acid $$+$$ Energy

C
Glucose $$+$$ Oxygen $$\rightarrow$$ Energy $$+$$ Carbon dioxide $$+$$ Water

D
Glucose $$+$$ Carbon dioxide $$\rightarrow$$ Oxygen $$+$$ Energy $$+$$ Water

Solution

Aerobic respiration takes place in the presence of oxygen.
Chemical equation for respiration- C₆H₁₂O₆ (aq) + 6 O₂ (g) → 6 CO₂ (g) + 6 H₂O (l) + Energy.
Hence, Option 'C' is correct.
Question 6
1 / -0

Which of the following statements is/are true(T) or false(F) regarding nutrition in organisms?
(i) Photosynthesis also occurs in leaves having colors other than green.
(ii) The process of photosynthesis first produces a simple carbohydrate called glucose which then gets converted into a complex carbohydrate called starch.
(iii) Cuscuta is a yellow-colored plant but it can synthesize its own food by photosynthesis.
(iv) In a symbiotic association, Rhizobium bacteria derive their nutrition from fungus.

A
(i)-F, (ii)-T, (iii)-F, (iv)-F

B
(i)-T, (ii)-T, (iii)-T, (iv)-F

C
(i)-F, (ii)-F, (iii)-F, (iv)-T

D
(i)-T, (ii)-T, (iii)-F, (iv)-F
Question 7
1 / -0

Pancreatic amylase acts on _______.

A
Starch

B
Protein

C
Lipid

D
Disaccharide

Solution

Pancreatic amylase is a digestive enzyme secreted by the pancreas, which acts on starch. It breaks down the starch into smaller carbohydrate molecules. Pancreatic amylase completes the digestion of carbohydrates by breaking them into disaccharides in the small intestine.
So, the correct answer is option A.
Question 8
1 / -0

Utilization, rearrangement, and decomposition of complex organic matter, known as _______.

A
Autotrophic

B
Heterotrophic

C
Producers

D
Decomposers
Question 9
1 / -0

What is example of heterotroph?

A
Animals

B
Plants

C
Producers

D
Decomposers

Solution

A. Animals
EXPLANATION: A heterotroph is an organism, which eats other plants and animals. Heterotrophs are also known as consumers, as they consume producers or other consumers. All animals come under heterotroph.
Question 10
1 / -0

The process does not takes place in photosynthesis is _______.

A
Absorption of light

B
Release of carbon dioxide

C
Release of oxygen

D
Absorption of carbon dioxide

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Re-Attempt Weekly Quiz Competition

Life Processes Test - 83

Result

Life Processes Test - 83

Score

-

Rank

-

SHARING IS CARING

Question 1

Water

Carbon dioxide

Sunlight

Chlorophyll

Question 2

Early morning

Evening

Night

Afternoon

Solution

Question 3

reptiles and birds

Amphibia and reptiles

Birds and mammals

Fish and amphibia

Solution

Question 4

Sodium

Potassium

Calcium

Magnesium

Question 5

Glucose $$\rightarrow$$ Alcohol $$+$$ Energy

Glucose $$\rightarrow$$ Lactic acid $$+$$ Energy

Glucose $$+$$ Oxygen $$\rightarrow$$ Energy $$+$$ Carbon dioxide $$+$$ Water

Glucose $$+$$ Carbon dioxide $$\rightarrow$$ Oxygen $$+$$ Energy $$+$$ Water

Solution

Question 6

(i)-F, (ii)-T, (iii)-F, (iv)-F

(i)-T, (ii)-T, (iii)-T, (iv)-F

(i)-F, (ii)-F, (iii)-F, (iv)-T

(i)-T, (ii)-T, (iii)-F, (iv)-F

Question 7

Starch

Protein

Lipid

Disaccharide

Solution

Question 8

Autotrophic

Heterotrophic

Producers

Decomposers

Question 9

Animals

Plants

Producers

Decomposers

Solution

Question 10

Absorption of light

Release of carbon dioxide

Release of oxygen

Absorption of carbon dioxide

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