Graves' disease is an autoimmune disorder characterized by hyperthyroidism. It is caused by the production of autoantibodies that: MCQ with Answer and Explanation

Question

Graves' disease is an autoimmune disorder characterized by hyperthyroidism. It is caused by the production of autoantibodies that:

A. Destroy the thyroid follicular cells

B. Target the parathyroid glands

C. Block the TSH receptors on the thyroid gland

D. Mimic TSH and continuously stimulate the TSH receptors

Answer: Option D

Solution (By JKSSB Mock Tests)

Graves' disease is an autoimmune condition where the immune system produces thyroid-stimulating immunoglobulins (TSIs). These autoantibodies bind to and mimic the action of Thyroid Stimulating Hormone (TSH) on the TSH receptors of the thyroid gland. This continuous, unregulated stimulation causes the thyroid to overproduce thyroid hormones (T3 and T4), leading to hyperthyroidism, goiter, and often exophthalmos (bulging eyes).

This question belongs to: Science Biology

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1

Share Report

The silkworm used in sericulture is the larva of:

A. Bombyx mori

B. Apis mellifera

C. Drosophila melanogaster

D. Labeo rohita

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
Bombyx mori is the domesticated silkworm, whose caterpillar spins a silk cocoon. The silk thread is obtained by boiling cocoons. Apis mellifera is the honeybee, Labeo rohita is a fish (rohu), Drosophila is fruit fly used in genetics. Sericulture involves mulberry cultivation, silkworm rearing, and reeling of silk. India is the second largest silk producer.

This question belongs to: Science Biology

Question #2

Share Report

Assertion (A): Diabetes mellitus is characterized by hyperglycemia.
Reason (R): It is caused by deficiency or resistance to insulin.

A. Both A and R are true, and R is the correct explanation.

B. Both A and R are true, but R is not the correct explanation.

C. A true, R false.

D. A false, R true.

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
Diabetes mellitus results in high blood glucose due to insulin deficiency (Type 1) or resistance (Type 2). The reason correctly explains the assertion.

This question belongs to: Science Biology

Question #3

Share Report

The process by which plants produce glucose using light energy is called:

A. Chemosynthesis

B. Respiration

C. Fermentation

D. Photosynthesis

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
Photosynthesis is the anabolic process in which plants, algae, and cyanobacteria convert CO₂ and H₂O into glucose and O₂ using light energy, catalyzed by chlorophyll. Respiration breaks down glucose to release energy, fermentation is anaerobic breakdown, chemosynthesis uses chemical energy (in some bacteria).

This question belongs to: Science Biology

Explore All Biology MCQs