Consider the following statements about hormones: 1. Insulin is a peptide hormone. 2. Thyroxine is an amino acid derivative. 3. Cortisol is a steroid hormone. Which of the above is/are correct? MCQ with Answer and Explanation

Question

Consider the following statements about hormones:
1. Insulin is a peptide hormone.
2. Thyroxine is an amino acid derivative.
3. Cortisol is a steroid hormone.
Which of the above is/are correct?

A. 1 and 3 only

B. 2 and 3 only

C. 1, 2, and 3

D. 1 and 2 only

Answer: Option C

Solution (By JKSSB Mock Tests)

Insulin is a peptide, thyroxine derived from tyrosine, cortisol a steroid. All three classifications are correct.

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Question #1

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Identify the INCORRECT statement about the human body:

A. The heart is located on the right side of the chest.

B. The liver is the largest gland.

C. The skin is the largest organ.

D. The femur is the longest bone.

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Correct Answer: Option A

Explanation:
The heart is situated in the mediastinum slightly left of the midline. All other statements are true.

This question belongs to: Science Biology

Question #2

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The organelle that is the site of glycolysis is the:

A. Golgi body

B. Nucleus

C. Cytoplasm

D. Mitochondria

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Correct Answer: Option C

Explanation:
Glycolysis, the breakdown of glucose to pyruvate, occurs in the cytoplasm of cells. The Krebs cycle and oxidative phosphorylation occur in mitochondria.

This question belongs to: Science Biology

Question #3

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Consider statements about ribosomes: 1. They are non-membranous organelles. 2. Prokaryotic ribosomes are 80S. 3. They are the site of protein synthesis. Which are correct?

A. 1, 2 and 3

B. 1 and 3 only

C. 1 and 2 only

D. 2 and 3 only

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Correct Answer: Option B

Explanation:
Ribosomes are dense, spherical, non-membranous structures composed of RNA and proteins. They are the cellular factories for protein synthesis. Prokaryotic ribosomes are 70S (50S + 30S subunits), while eukaryotic cytoplasmic ribosomes are 80S (60S + 40S subunits). Therefore, statements 1 and 3 are correct, but statement 2 is false.

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