PCR is a technique used to: MCQ with Answer and Explanation

PCR is a technique used to:
A. Cut DNA
B. Amplify a specific DNA sequence
C. Separate DNA fragments
D. Sequence DNA
Answer: Option B
Solution (By JKExamLibrary)
Polymerase chain reaction (PCR) uses Taq polymerase and primers to exponentially amplify a target DNA segment in vitro.

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Practice More Biology Questions

Question #1
The process by which water moves up the xylem against gravity is mainly due to:
A. Active pumping
B. Transpiration-cohesion-tension
C. Root pressure
D. Capillarity

Correct Answer: Option B


Explanation:
The cohesion-tension theory states that transpiration from leaves creates tension, pulling water up the xylem; water molecules cohere, forming a continuous column. Root pressure is minor.

This question belongs to: Science Biology
Question #2
The condition in which the lens of the eye becomes cloudy, impairing vision, is:
A. Cataract
B. Myopia
C. Hypermetropia
D. Glaucoma

Correct Answer: Option A


Explanation:
Cataract is clouding of the crystalline lens leading to decreased vision, commonly age-related. Glaucoma is optic nerve damage often due to increased intraocular pressure. Myopia is nearsightedness, hypermetropia is farsightedness. Cataract surgery replaces the lens with an artificial one.

This question belongs to: Science Biology
Question #3
The hormone that stimulates the growth of the ovarian follicle is:
A. Estrogen
B. FSH
C. LH
D. Progesterone

Correct Answer: Option B


Explanation:
Follicle-stimulating hormone (FSH) from the anterior pituitary promotes the growth and maturation of ovarian follicles and stimulates estrogen secretion. LH triggers ovulation, estrogen proliferates endometrium, progesterone maintains it.

This question belongs to: Science Biology