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 21 Discuss
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Name a common electrolyte disorder that occurs when the amount of sodium in your blood becomes abnormally low.

A
Hyperkalemia
B
Hypokalemia
C
Hyponatremia
D
Hypernatremia

Answer & Explanation

Correct Option: C

Hyponatremia literally translates to 'low blood sodium,' a hazardous metabolic condition frequently occurring when excess water dilutes the body's essential sodium stores.
Question 22 Discuss
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Which is a serious contagious bacterial infection that usually affects the mucous membranes of the nose and throat?

A
Meningococcal
B
Diphtheria
C
Shigellosis
D
Chlamydia

Answer & Explanation

Correct Option: B

Diphtheria is caused by the robust bacterium Corynebacterium diphtheriae, which dangerously produces a distinct toxin that forms a thick gray coating in the throat and nose.
Question 23 Discuss
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The organisms that do not have a defined nucleus or organelles are classified in to Kingdom.

A
Fungi
B
Protista
C
Monera
D
Plantae

Answer & Explanation

Correct Option: C

Kingdom Monera classically encompasses all prokaryotic organisms, such as bacteria, which entirely lack a true membrane-bound nucleus and specialized internal organelles.
Question 24 Discuss
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Which of the following does NOT belong to the category of Porifera?

A
Hydra
B
Sycon
C
Spongilla
D
Euplectella

Answer & Explanation

Correct Option: A

Hydra biologically belongs to the phylum Cnidaria, not Porifera, because it firmly exhibits specialized tissue levels of organization and radial symmetry unlike typical primitive sponges.
Question 25 Discuss
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Which of the following classes includes the family of turtles?

A
Chondrichthyes
B
Reptilia
C
Amphibia
D
Aves

Answer & Explanation

Correct Option: B

Turtles are undeniably cold-blooded amniotes uniquely covered with specialized bony shells, classifying them definitively under the biological class Reptilia.
Question 26 Discuss
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What is the reason for the similar size of the vascular bundle in monocot leaves?

A
Cubical venation
B
Radial venation
C
Rectangular venation
D
Parallel venation

Answer & Explanation

Correct Option: D

Monocot leaves typically exhibit parallel venation, meaning their prominent leaf veins (and identical underlying vascular bundles) run evenly side-by-side without forming a net.
Question 27 Discuss
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Which of the following is an inactivated (killed) polio vaccine developed in 1952?

A
Salk vaccine
B
Imvanex vaccine
C
HDCV vaccine
D
TAB vaccine

Answer & Explanation

Correct Option: A

Medical researcher Jonas Salk famously developed the first successful polio vaccine in 1952 by meticulously utilizing a chemically inactivated (killed) version of the poliovirus.
Question 28 Discuss
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Which of the following is responsible for the red colour of beetroot?

A
Curcumin
B
Betanin
C
Beta carotene
D
Lycopene

Answer & Explanation

Correct Option: B

Betanin is a distinct red-violet water-soluble organic pigment found prominently in beets, primarily responsible for intensely providing their characteristic deep red coloration.
Question 29 Discuss
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What is the name of the inflammatory condition that causes cracks, crusting and scaling at the corners of the mouth due to vitamin B2 deficiency?

A
Scurvy
B
Pellagra
C
Angular cheilitis
D
Rickets

Answer & Explanation

Correct Option: C

Angular cheilitis is a painful inflammatory condition frequently triggered by a severe bodily deficiency in riboflavin (vitamin B2), resulting in highly irritated, cracked sores at the mouth's corners.
Question 30 Discuss
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Which essential amino acid enhances calcium absorption and also plays an important role in the formation of collagen?

A
Leucine
B
Valine
C
Tryptophan
D
Lysine

Answer & Explanation

Correct Option: D

Lysine is a critical essential amino acid that the body strictly requires to facilitate excellent intestinal calcium absorption and to ensure the proper enzymatic cross-linking of structural collagen fibers.
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