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 551 Discuss
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Which of the following is an example of an 'Amphibious' plant

A
Hydrilla
B
Ranunculus
C
Lotus
D
Valisneria

Answer & Explanation

Correct Option: B

Ranunculus (Buttercup) species are often amphibious, having some parts adapted for water and others for land.
Question 552 Discuss
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The 'Basal Body' of a cilium or flagellum is formed by

A
Mitochondria
B
Centriole
C
Lysosome
D
Nucleolus

Answer & Explanation

Correct Option: B

Cilia and flagella emerge from basal bodies, which have a structure identical to centrioles.
Question 553 Discuss
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In humans 'Haemolysis' refers to the

A
Formation of new blood cells
B
Destruction of red blood cells
C
Clotting of blood
D
Transport of oxygen

Answer & Explanation

Correct Option: B

Haemolysis is the rupture of RBCs, releasing hemoglobin into the surrounding fluid.
Question 554 Discuss
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Identify the 'Tricky' part: Which of the following is a 'Genetic' material in some viruses but never in humans

A
Single stranded DNA
B
Double stranded DNA
C
Double stranded RNA
D
Messenger RNA

Answer & Explanation

Correct Option: C

Humans use mRNA as a transient copy, but dsRNA is never the permanent genome; some viruses use it.
Question 555 Discuss
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The 'Cornea' of the human eye does not have blood vessels and receives oxygen directly from the

A
Atmosphere
B
Retina
C
Optic nerve
D
Vitreous humor

Answer & Explanation

Correct Option: A

Being avascular, the cornea absorbs oxygen from the air dissolved in the tear film.
Question 556 Discuss
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Which among the following is a 'Non-symbiotic' nitrogen-fixing bacteria

A
Rhizobium
B
Azotobacter
C
Frankia
D
Xanthomonas

Answer & Explanation

Correct Option: B

Azotobacter is a free-living soil bacterium that can fix nitrogen without a plant host.
Question 557 Discuss
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The 'Islets of Langerhans' were named after

A
Paul Langerhans
B
Robert Koch
C
Alexander Fleming
D
Gregor Mendel

Answer & Explanation

Correct Option: A

Paul Langerhans was the German pathologist who first described these clusters of cells in 1869.
Question 558 Discuss
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Which hormone inhibits the secretion of 'Growth Hormone' (GH) from the pituitary

A
Somatotropin
B
Somatostatin
C
Prolactin
D
Thyroxine

Answer & Explanation

Correct Option: B

Somatostatin (GHIH) is produced by the hypothalamus to stop GH release.
Question 559 Discuss
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The 'Isotonic' solution for human RBCs is

A
0.1% NaCl
B
0.9% NaCl
C
5.0% NaCl
D
Pure water

Answer & Explanation

Correct Option: B

0.9% saline (Normal Saline) is osmotic to blood, so RBCs neither shrink nor swell.
Question 560 Discuss
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Identify the 'Tricky' part: Which of the following is 'NOT' an enzyme

A
Pepsin
B
Trypsin
C
Oxytocin
D
Amylase

Answer & Explanation

Correct Option: C

Oxytocin is a peptide hormone, while the others are digestive enzymes.
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