Free MCQs & Online Quiz Practice for Exams

Q: The systemic circuit of the cardiovascular system extends:

A) From the heart to the lungs

B) From heart to the coronary arteries

C) From the heart to the body's organs and tissues

D) From the gastrointestinal tract to the liver

Q: The only vein in the body that transports oxygen-rich blood is the:

A) Coronary vein

B) Hepatic portal vein

C) Pulmonary vein

D) Aortic vein

Q: The semilunar valves prevent blood from flowing backwards:

A) Into the atria

B) Into the ventricles

C) Into the aorta

D) Into the vena cava

Q: All the following apply to the bicuspid valve EXCEPT:

A) It is also called the mitral valve

B) It is a semilunar valve

C) It is found on the left side of the heart

D) It prevents blood from backing into the left atrium

Q: The condition called arrhythmia is characterized by:

A) Rapid heart contraction

B) Irregular heart rhythms

C) Mitral valve prolapse

D) Semilunar valve dysfunction

Q: Intercalated disks are found:

A) Between the right side and right side of the heart

B) Between the flaps of the tricuspid valve

C) Where the aorta joins the pulmonary artery

D) Between the cardiac muscle cells

Q: Blood flowing through a vein tends to:

A) Pulse

B) Collect blood

C) Carry oxygen to the body cells

D) Flow at a faster rate than in the artery

Q: Which of these is not true of both T cells and B cells?

A) They are both lymphocytes

B) They both pass through the thymus

C) They both are responsible for immunity

D) They both have receptor sites

Q: Memory cells of the immune system are derived from:

A) T lymphocytes

B) B lymphocytes

C) Plasma cells

D) Both a and b

Q: Which one of these is specifically responsible for antibody mediated immunity?

A) T cells

B) Epithelial cells

C) Platelets

D) Plasma cells

Q: T cells:

A) Are responsible for cell mediated immunity

B) Cause tumors in the body

C) Stimulate and suppress red blood cells

D) Helps in regeneration process

Q: Compound formed in an organism for inhibiting growth of another organism is:

A) Antigen

B) Antibody

C) Antibiotic

D) Antiallergic

Q: Antigen binding site in an antibody is found between:

A) Two light chains

B) Two heavy chains

C) One heavy and one light chain

D) Two heavy and two light chains

Q: Humoral immunity is due to:

A) T-lymphocytes

B) L-lymphocytes

C) P-lymphocytes

D) B-lymphocytes

Q: Hypersensitivity to an allergen is due to:

A) Increase in temperature

B) Food habits

C) Age

D) Aberrant functioning of immune system

Q: Surgical removal of thymus of a new born shall result in failure to produce:

A) Monocytes

B) B-lymphocytes

C) T-lymphocytes

D) Basophils

Q: The ultimate source of energy for maintenance of life on earth is

A) Carbohydrate

B) ATP

C) Sun

D) Mitochondria

Q: In which compartment of the plant cell do the light-independent reactions of photosynthesis take place?

A) Thylakoid

B) Stroma

C) Outer membrane

D) Mesophyll

Q: What would happen if the process of photosynthesis stops on earth?

A) There will be more food

B) No problem to living organisms

C) No life on earth possible

D) Living organisms will start using direct energy from sun

Q: Identify in the following which is not a limiting factor for photosynthesis

A) Light intensity

B) Temperature

C) Concentration of carbon dioxide

D) Concentration of oxygen