Free Human Body and Health MCQs with Answers

131. The energy currency of the cell is called?

• A. ATP
• B. Fat
• C. LEAD
• D. None of These

Explanation: ATP, or adenosine triphosphate, stores and transfers usable energy for cellular processes such as active transport and muscle contraction. Fat is an energy reserve, but it is not the cell's immediate energy currency.

132. Who is the inventor of the first magnetic resonance imaging (MRI) machine?

• A. Godfrey Hounsfieldv
• B. Mattias Schleiden
• C. Raymond Damadian
• D. Theodore Schwann

Explanation: Raymond Damadian built the first full-body MRI scanner and is widely credited with inventing the MRI machine. Hounsfield is associated with the invention of computed tomography, not MRI.

133. Cancer that does not form a tumor.

• A. metastatic breast cancer
• B. leukemia
• C. lung cancer
• D. bladder cancer

Explanation: Leukemia is a cancer of blood-forming tissues in which abnormal cells circulate through the blood and bone marrow rather than forming one solid tumor. Breast, lung, and bladder cancers usually begin as tumors in organs.

134. How Many Megapixels is the Human Eye?

• A. 570
• B. 576
• C. 560
• D. None of These

Explanation: The human eye is often compared with a camera of about 576 megapixels, based on an estimate of retinal resolution. This is only an approximate analogy because the eye and a digital camera process images differently.

135. Tetanus is a _________ infection.

• A. Viral
• B. Bacterial
• C. Fungal
• D. Parasitic

Explanation: Tetanus is caused by the bacterium Clostridium tetani, whose spores can enter wounds and produce a neurotoxin. It is therefore bacterial rather than viral, fungal, or parasitic.

136. Parkinson is a disease of____________?

• A. Eyes
• B. Brain
• C. Heart
• D. Lungs

Explanation: Parkinson’s disease is a progressive disorder of the brain, especially involving loss of dopamine-producing nerve cells in the substantia nigra. Its characteristic effects include tremor, stiffness, and slowed movement.

137. Tuberculosis is a _________ infection?

• A. Viral
• B. Bacterial
• C. Fungal
• D. Parasitic

Explanation: Tuberculosis is caused mainly by the bacterium Mycobacterium tuberculosis and commonly affects the lungs. It is not caused by a virus, fungus, or parasite.

138. Vaccination is synonymous with ___________ immunity?

• A. Artificial Active
• B. Natural Active
• C. Allergy
• D. None of These

Explanation: Vaccination introduces an antigen artificially and stimulates the person's own immune system to form memory cells, so it produces artificial active immunity. Passive immunity involves receiving ready-made antibodies instead.

139. Thanatology is the study of _________?

• A. Careers
• B. Being
• C. Death
• D. Soul

Explanation: Thanatology combines the Greek word for death with the study of a subject, so it examines death, dying and related psychological, social and medical issues. It is not specifically the study of the soul or careers.

140. _______ bacterial disease affects Eye?

• A. Trachoma
• B. Rickets
• C. Osteoporosis
• D. Gum disease

Explanation: Trachoma is a bacterial eye infection caused by certain strains of Chlamydia trachomatis and can cause blindness if untreated. Rickets and osteoporosis affect bones rather than primarily the eye.