The hormone that promotes the absorption of glucose into cells is: MCQ with Answer and Explanation

The hormone that promotes the absorption of glucose into cells is:
A. Insulin
B. Epinephrine
C. Glucagon
D. Cortisol
Answer: Option A
Solution (By JKExamLibrary)
Insulin stimulates GLUT4 transporters to move to the cell membrane, increasing glucose uptake in muscle and adipose tissue. Glucagon raises blood glucose.

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Practice More Biology Questions

Question #1
In the human body, the 'Pons' is a structure in the brainstem that contains the:
A. Cardiovascular center
B. Pneumotaxic and apneustic centers for respiratory regulation
C. Thermoregulatory center
D. Visual and auditory reflex centers

Correct Answer: Option B


Explanation:
The pons is a prominent bulge in the brainstem, located between the midbrain and the medulla oblongata. It serves as a relay station between different parts of the brain. Crucially, the pons contains the pneumotaxic center and the apneustic center, which are part of the respiratory control network. These centers modulate the activity of the primary respiratory center in the medulla, regulating the rate and depth of breathing. The cardiovascular center is in the medulla, and visual/auditory reflexes are in the midbrain.

This question belongs to: Science Biology
Question #2
The 'Hershey-Chase' experiment in 1952 used radioactive isotopes to prove that DNA is the genetic material of bacteriophages. They used:
A. 32P to label proteins and 35S to label DNA
B. 15N to label proteins and 14N to label DNA
C. 14C to label proteins and 3H to label DNA
D. 35S to label proteins and 32P to label DNA

Correct Answer: Option D


Explanation:
In 1952, Alfred Hershey and Martha Chase conducted the famous blender experiment to confirm that DNA is the genetic material of the T2 bacteriophage. They used radioactive sulfur (35S) to label the protein coat (capsid) of the phage, as sulfur is present in amino acids (methionine, cysteine) but not in DNA. They used radioactive phosphorus (32P) to label the DNA, as phosphorus is in the DNA backbone but not in proteins. After infection and blending, they found that only 32P (DNA) entered the bacterial cell to produce new phages, proving DNA is the genetic material.

This question belongs to: Science Biology
Question #3
The organelle that contains enzymes for the glyoxylate cycle in plants is the:
A. Glyoxysome
B. Mitochondria
C. Chloroplast
D. Peroxisome

Correct Answer: Option A


Explanation:
Glyoxysomes are specialized peroxisomes in oil-storing seeds that contain glyoxylate cycle enzymes, converting lipids to carbohydrates during germination.

This question belongs to: Science Biology