General Science Jkssb Biology Set 1 Mcqs (605 MCQs) | JKSSB & SSC Quiz

General Science

jkssb biology set 1 mcqs

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Practice Questions

605 Total
Question 571 Discuss
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In the process of 'DNA Replication' the fragments on the lagging strand are known as

A
Watson fragments
B
Okazaki fragments
C
Crick fragments
D
Mendel fragments

Answer & Explanation

Correct Option: B

These short segments are synthesized discontinuously and later joined by DNA ligase.
Question 572 Discuss
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Which specific 'Enzyme' is used as a 'Marker' for Mitochondria

A
Cytochrome oxidase
B
Acid phosphatase
C
Hexokinase
D
Catalase

Answer & Explanation

Correct Option: A

Cytochrome oxidase is part of the electron transport chain located in the inner mitochondrial membrane.
Question 573 Discuss
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The 'Basal Metabolism' in the body is increased by which of the following

A
Fasting
B
Exercise
C
Hypothyroidism
D
Sleep

Answer & Explanation

Correct Option: B

Muscle activity and increased demand for energy raise the overall metabolic rate.
Question 574 Discuss
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Identify the 'Tricky' mineral element required for the structure of Chlorophyll

A
Iron
B
Magnesium
C
Phosphorus
D
Zinc

Answer & Explanation

Correct Option: B

A single magnesium atom is at the center of the porphyrin ring of the chlorophyll molecule.
Question 575 Discuss
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Which among the following is 'NOT' an accessory pigment in photosynthesis

A
Chlorophyll b
B
Carotenoids
C
Chlorophyll a
D
Xanthophylls

Answer & Explanation

Correct Option: C

Chlorophyll a is the primary reaction center pigment; others are accessory pigments that harvest light.
Question 576 Discuss
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Identify the 'Application': Why do fruits ripen faster in a closed bag with an apple

A
Carbon dioxide accumulation
B
Ethylene gas buildup
C
Heat trapping
D
Lack of sunlight

Answer & Explanation

Correct Option: B

Apples release high amounts of ethylene, which triggers ripening in neighboring fruits.
Question 577 Discuss
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The 'Bilateral' symmetry is absent in which of the following adult organisms

A
Earthworm
B
Starfish
C
Cockroach
D
Fish

Answer & Explanation

Correct Option: B

Adult starfish show radial symmetry, though their larvae are bilaterally symmetrical.
Question 578 Discuss
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Identify the 'Tricky' hormone: Which of the following is 'NOT' a steroid hormone

A
Cortisol
B
Testosterone
C
Insulin
D
Estrogen

Answer & Explanation

Correct Option: C

Insulin is a protein hormone; the others are lipid-derived steroids.
Question 579 Discuss
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In the human eye 'Night Vision' is primarily possible due to

A
Cones
B
Rods
C
Ciliary muscles
D
Iris

Answer & Explanation

Correct Option: B

Rod cells contain rhodopsin, which allows for vision in extremely low light levels.
Question 580 Discuss
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Which enzyme is used in the 'PCR' (Polymerase Chain Reaction) to withstand high temperatures

A
DNA Ligase
B
Taq Polymerase
C
RNA Polymerase
D
Helicase

Answer & Explanation

Correct Option: B

Taq polymerase is derived from the thermophilic bacterium Thermus aquaticus.
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