The 'Hormone Amylin' (Islet Amyloid Polypeptide) is co-secreted with insulin by the beta cells of the pancreas. Its primary functions include: MCQ with Answer and Explanation

The 'Hormone Amylin' (Islet Amyloid Polypeptide) is co-secreted with insulin by the beta cells of the pancreas. Its primary functions include:
A. Increasing gastric acid secretion
B. Slowing gastric emptying, suppressing glucagon secretion, and promoting satiety
C. Stimulating insulin release
D. Stimulating intestinal motility
Answer: Option B
Solution (By JKSSB Mock Tests)
Amylin, also known as Islet Amyloid Polypeptide (IAPP), is a 37-amino acid peptide hormone that is co-secreted with insulin from the pancreatic beta cells in response to meals (in a ratio of about 1:100 to insulin). Its primary functions are to complement the actions of insulin in regulating postprandial (after-meal) glucose levels. It does this by slowing gastric emptying (preventing a rapid spike in blood glucose), suppressing the secretion of glucagon (preventing the liver from releasing glucose), and acting on the brain to promote satiety and reduce food intake.

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Which of the following vitamins is required for the synthesis of collagen?
A. Vitamin D
B. Vitamin A
C. Vitamin C
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Correct Answer: Option C


Explanation:
Vitamin C (ascorbic acid) is a cofactor for prolyl and lysyl hydroxylase enzymes that hydroxylate proline and lysine in collagen synthesis, necessary for stabilizing collagen triple helix. Deficiency leads to impaired collagen formation, causing scurvy—fragile blood vessels, bleeding gums, poor wound healing. Vitamin A is for vision, D for bone, K for clotting.

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The part of the human ear that converts sound vibrations into neural signals is the:
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B. Auditory nerve
C. Cochlea
D. Ossicles

Correct Answer: Option C


Explanation:
The cochlea, a spiral-shaped organ in the inner ear, contains the organ of Corti with hair cells that transduce mechanical vibrations into electrical impulses. The eardrum and ossicles conduct sound to the cochlea. The auditory nerve transmits impulses to the brain. Thus, transduction occurs in the cochlea.

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Question #3
Assertion (A): The cell wall of fungi is made of cellulose.
Reason (R): Chitin is a characteristic component of fungal cell walls.
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C. Both A and R are true, and R is the correct explanation.
D. Both A and R are true, but R is not the correct explanation.

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