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 411 Discuss
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Which of the following plant hormones is a 'Gas'

A
Auxin
B
Ethylene
C
Gibberellin
D
Cytokinin

Answer & Explanation

Correct Option: B

Ethylene is the only gaseous phytohormone, primarily known for its role in fruit ripening.
Question 412 Discuss
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The 'Kyoto Protocol' 1997 is an international agreement to

A
Protect migratory species
B
Reduce greenhouse gas emissions
C
Phase out ozone-depleting substances
D
Combat desertification

Answer & Explanation

Correct Option: B

The protocol set binding targets for industrialized nations to reduce emissions of CO2 and other greenhouse gases.
Question 413 Discuss
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Which part of the human eye is sensitive to 'Color' vision

A
Rods
B
Cones
C
Sclera
D
Cornea

Answer & Explanation

Correct Option: B

Cone cells are responsible for color vision and high visual acuity, whereas rods function in low light.
Question 414 Discuss
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Identify the incorrect statement about 'Active Transport'

A
It occurs against the concentration gradient
B
It requires metabolic energy (ATP)
C
It always involves a carrier protein
D
It occurs from higher to lower concentration

Answer & Explanation

Correct Option: D

Active transport moves substances 'uphill' from low concentration to high concentration.
Question 415 Discuss
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The 'Sinus Rhythm' of the heart is determined by the

A
AV node
B
SA node
C
Purkinje system
D
Brainstem

Answer & Explanation

Correct Option: B

The SA node acts as the primary natural pacemaker, setting the rate and rhythm of the heartbeat.
Question 416 Discuss
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In the human digestive system the absorption of 'Fat-soluble' vitamins occurs mainly in the

A
Stomach
B
Large intestine
C
Small intestine
D
Liver

Answer & Explanation

Correct Option: C

Fat-soluble vitamins (A, D, E, K) are absorbed along with dietary fats in the small intestine via micelles.
Question 417 Discuss
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The 'Turner Syndrome' in humans is caused by

A
Trisomy of chromosome 21
B
Monosomy of X chromosome (45, X0)
C
Extra X chromosome in males (47, XXY)
D
Trisomy of chromosome 18

Answer & Explanation

Correct Option: B

Turner syndrome affects females who are missing one of their X chromosomes, leading to developmental issues.
Question 418 Discuss
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Which of the following describes the function of 'Dendrites' in a neuron

A
To transmit signals away from the cell body
B
To receive signals from other neurons and conduct them to the cell body
C
To insulate the axon
D
To release neurotransmitters into the synapse

Answer & Explanation

Correct Option: B

Dendrites are branching extensions that act as the input portion of the neuron.
Question 419 Discuss
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In the process of 'Photosynthesis' the light reactions take place in the

A
Stroma
B
Thylakoid membranes
C
Outer membrane
D
Cytoplasm

Answer & Explanation

Correct Option: B

Light reactions involve the absorption of light and the splitting of water in the thylakoids/grana.
Question 420 Discuss
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The primary antibody found in 'Colostrum' (initial mother's milk) is

A
IgG
B
IgM
C
IgA
D
IgE

Answer & Explanation

Correct Option: C

Secretory IgA provides passive immunity to the newborn's intestinal tract.
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