Thyroxine hormone is produced by the: MCQ with Answer and Explanation

Question

Share Report Error

Thyroxine hormone is produced by the:

A. Pituitary gland

B. Adrenal gland

C. Thyroid gland

D. Parathyroid gland

Answer: Option C

Solution (By JKExamLibrary)

Thyroxine (T₄) and triiodothyronine (T₃) are synthesized by thyroid follicular cells. They regulate basal metabolic rate, growth, and development. Iodine is essential for their synthesis.

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

The scientist who discovered the antibiotic streptomycin from soil bacteria was:

A. Louis Pasteur

B. Selman Waksman

C. Alexander Fleming

D. Robert Koch

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option B

Explanation:
Selman Waksman and colleagues isolated streptomycin from Streptomyces griseus in 1943, the first effective treatment for tuberculosis. Fleming discovered penicillin, Pasteur developed vaccines, Koch identified TB bacterium.

This question belongs to: Science Biology

Question #2

The hormone that inhibits gastric secretion and motility is:

A. Gastric inhibitory peptide (GIP)

B. Secretin

C. Cholecystokinin

D. Gastrin

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
GIP (glucose-dependent insulinotropic peptide), released by the small intestine, inhibits gastric acid secretion and motility, and stimulates insulin release. Gastrin stimulates acid secretion, secretin stimulates bicarbonate, CCK stimulates gall bladder contraction. GIP was originally named for its gastric inhibitory effect.

This question belongs to: Science Biology

Question #3

A person with blood group 'O' is considered a universal donor because:

A. Their RBCs lack A and B antigens

B. Their blood has no Rh factor

C. Their RBCs have both A and B antigens

D. Their plasma lacks antibodies

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
Individuals with blood group 'O' have red blood cells that lack both A and B antigens on their surface. Because there are no antigens to react with the recipient's antibodies, their blood can be safely transfused to individuals of any ABO blood group in emergencies. However, their plasma contains both anti-A and anti-B antibodies.

This question belongs to: Science Biology

Explore All Biology MCQs