Explore topic-wise MCQs in Life Sciences.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Life Sciences knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the name of the gland which secrete melatonin?

A. Pituitary gland
B. Pineal gland
C. Thyroid gland
D. Hypothalamus
Answer» C. Thyroid gland
Discussion
2.

What is the name of the gland which secrete melatonin?
A. Pituitary gland
B. Pineal gland
C. Thyroid gland
D. Hypothalamus
Answer» C. Thyroid gland
Discussion
3.

How many oxygen molecules bound to hemoglobin to give 50% saturation?

A. 6
B. 4
C. 2
D. 7
Answer» D. 7
Discussion
4.

Oxygen and hemoglobin bind in a reversible manner to form______

A. Carboxyhemoglobin
B. Oxyhemoglobin
C. Methoglobin
D. BPG
Answer» C. Methoglobin
Discussion
5.

Which of the following controls the normal breathing process?

A. Amino acids
B. Cholesterol
C. Ventral respiratory group
D. Dorsal respiratory group
Answer» E.
Discussion
6.

Which of this statement is TRUE for pulmonary respiration?

A. Exchange of gases between alveoli of lungs and the blood
B. Exchange of gases between blood and tissue cells
C. Breathing between the atmosphere and the alveoli of the lungs
D. Production of ATP
Answer» B. Exchange of gases between blood and tissue cells
Discussion
7.

Which of the following is NOT the function of the respiratory system?

A. Regulate blood pH
B. Helps in gaseous exchange
C. Protection against blood loss
D. Contains receptors for the sense of smell
Answer» D. Contains receptors for the sense of smell
Discussion
8.

Nose, larynx, pharynx, lungs, trachea, and bronchi are the parts of the respiratory system.

A. True
B. False
Answer» B. False
Discussion
9.

Name the process of gaseous exchange in the body.

A. Lymphatic system
B. Respiration
C. Cardiovascular system
D. Respiratory system
Answer» C. Cardiovascular system
Discussion