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

General Science

jkssb biology set 1 mcqs

Download PDF

Topics

jkssb physics set 1 mcqs jkssb chemistry set 1 mcqs jkssb biology set 1 mcqs

Practice Questions

605 Total
Question 511 Discuss
Ask a Friend

The 'Functional Residual Capacity' (FRC) of the lungs is the sum of

A
Tidal Volume + Residual Volume
B
Expiratory Reserve Volume + Residual Volume
C
Inspiratory Reserve Volume + Tidal Volume
D
Vital Capacity + Residual Volume

Answer & Explanation

Correct Option: B

FRC represents the air remaining in the lungs after a normal, quiet expiration.
Question 512 Discuss
Ask a Friend

Which 'Phytohormone' is primarily used to induce rooting in stem cuttings

A
Cytokinins
B
Gibberellins
C
Auxins
D
Ethylene

Answer & Explanation

Correct Option: C

Auxins like IBA and NAA are commonly used in horticulture to promote adventitious root formation.
Question 513 Discuss
Ask a Friend

The 'Islets of Langerhans' contribute what percentage to the total weight of the pancreas

A
98-99%
B
50%
C
1-2%
D
25%

Answer & Explanation

Correct Option: C

The bulk of the pancreas is exocrine (98%); the endocrine islets make up a tiny fraction.
Question 514 Discuss
Ask a Friend

Identify the 'Application': Why do cells of a salt-water fish burst when placed in fresh water

A
Exosmosis occurs
B
Endosmosis occurs
C
Active transport stops
D
The cell wall is too weak

Answer & Explanation

Correct Option: B

Fresh water is hypotonic to the fish cells; water enters the cells until they lyse (burst).
Question 515 Discuss
Ask a Friend

The 'Nerve Impulse' jump from one node of Ranvier to another is known as

A
Continuous conduction
B
Saltatory conduction
C
Synaptic delay
D
Refractory period

Answer & Explanation

Correct Option: B

Saltatory conduction (from 'saltare' meaning to leap) is much faster than conduction in unmyelinated fibers.
Question 516 Discuss
Ask a Friend

In a DNA molecule the percentage of 'Adenine' is 30% What would be the percentage of 'Guanine'

A
30%
B
70%
C
20%
D
40%

Answer & Explanation

Correct Option: C

By Chargaff's rule, A=T (30%+30%=60%). The remaining 40% is G+C, so G=20%.
Question 517 Discuss
Ask a Friend

Identify the correctly matched 'Excretory Organ' and the animal

A
Flame cells - Earthworm
B
Malpighian tubules - Cockroach
C
Nephridia - Flatworm
D
Antennal glands - Snail

Answer & Explanation

Correct Option: B

Cockroaches use Malpighian tubules; Earthworms use Nephridia; Flatworms use Flame cells.
Question 518 Discuss
Ask a Friend

Which specific 'Bio-molecule' is tested using the 'Biuret Test'

A
Carbohydrates
B
Lipids
C
Proteins
D
Nucleic acids

Answer & Explanation

Correct Option: C

The Biuret test detects the presence of peptide bonds, indicating proteins.
Question 519 Discuss
Ask a Friend

The 'Primary Productivity' of an ecosystem is limited by which factor in the ocean

A
Water
B
Temperature
C
Nutrients (like Nitrogen and Iron)
D
Oxygen

Answer & Explanation

Correct Option: C

Despite abundant light/water, many parts of the ocean are 'biological deserts' due to nutrient deficiency.
Question 520 Discuss
Ask a Friend

Which of the following organelles is called 'Cell within a Cell'

A
Ribosome
B
Chloroplast
C
Golgi body
D
Endoplasmic Reticulum

Answer & Explanation

Correct Option: B

Chloroplasts (and mitochondria) have their own DNA, ribosomes, and double membranes, resembling prokaryotic cells.
Previous Next