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 591 Discuss
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Which of the following is an example of 'Ex-situ' conservation

A
Botanical Garden
B
National Park
C
Sanctuary
D
Biosphere Reserve

Answer & Explanation

Correct Option: A

Botanical gardens conserve plants outside their natural habitats, unlike parks and reserves.
Question 592 Discuss
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Identify the hormone that inhibits 'Gastric' secretion and motility

A
Gastrin
B
Secretin
C
Enterogastrone
D
Both B and C

Answer & Explanation

Correct Option: D

Secretin and Enterogastrone (GIP) act to slow down the stomach once food enters the duodenum.
Question 593 Discuss
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In the human circulatory system the 'Purkinje Fibers' are located in the

A
Atria
B
Ventricle walls
C
SA node
D
Aorta

Answer & Explanation

Correct Option: B

These fibers distribute electrical impulses to the ventricular myocardium for contraction.
Question 594 Discuss
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Identify the 'Tricky' part: Which of the following is an example of an 'Incomplete' parasite

A
Cuscuta
B
Viscum (Mistletoe)
C
Rafflesia
D
None of these

Answer & Explanation

Correct Option: B

Viscum is a partial parasite; it can photosynthesize but depends on the host for water and minerals.
Question 595 Discuss
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The 'Basal Body' of cilia is also known as a

A
Centromere
B
Kinetosome
C
Kinetochore
D
Chromocenter

Answer & Explanation

Correct Option: B

Kinetosomes are the centriole-like structures at the base of cilia that anchor the microtubule axoneme.
Question 596 Discuss
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Which among the following is a 'Secondary' consumer in a pond ecosystem

A
Phytoplankton
B
Zooplankton
C
Small fish
D
Large fish

Answer & Explanation

Correct Option: C

Zooplankton are primary consumers (eat phytoplankton); small fish eat zooplankton (secondary).
Question 597 Discuss
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In the process of 'DNA Replication' the strands are separated by the enzyme

A
DNA Ligase
B
Helicase
C
DNA Polymerase
D
Topoisomerase

Answer & Explanation

Correct Option: B

Helicase 'unwinds' the double helix by breaking the hydrogen bonds between base pairs.
Question 598 Discuss
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Which specific 'Bacteria' is responsible for the 'Ammonification' of soil

A
Bacillus vulgaris
B
Nitrosomonas
C
Nitrobacter
D
Pseudomonas

Answer & Explanation

Correct Option: A

Ammonifying bacteria break down organic nitrogen from dead matter into ammonia.
Question 599 Discuss
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Identify the correctly matched 'Disease' and its causative agent

A
Common cold - Bacteria
B
Tuberculosis - Virus
C
Amoebiasis - Protozoa
D
Ringworm - Virus

Answer & Explanation

Correct Option: C

Amoebiasis is caused by Entamoeba histolytica; common cold is viral; TB is bacterial; ringworm is fungal.
Question 600 Discuss
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The 'Basal Body' of human sperm is located in the

A
Head
B
Middle piece
C
Neck
D
Tail

Answer & Explanation

Correct Option: C

The neck contains the centrioles, one of which gives rise to the axial filament of the tail.
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