Free Human Body and Health MCQs with Answers

151. RBCs are also called as_______?

• A. Leucocytes
• B. Erythrocytes
• C. Nucleotides
• D. AOT

Explanation: Red blood cells are called erythrocytes, from Greek roots meaning red cells. Leucocytes are white blood cells, so they are a different blood-cell type.

152. WBCs are also called as _________?

• A. Leukocytes
• B. Lymphocytes
• C. Nucleotides
• D. Erythrocytes

Explanation: White blood cells are collectively called leukocytes or leucocytes and defend the body against infection. Lymphocytes are only one type of leukocyte, while erythrocytes are red blood cells.

153. The percentage of blood cells in the Blood of human body is _________?

• A. 40%
• B. 45%
• C. 50%
• D. 60%Vitamins & Supplements

Explanation: Blood consists of about 55% plasma and about 45% formed elements, including red cells, white cells and platelets. Thus, the cellular portion is approximately 45%, although the exact percentage varies slightly.

154. The percentage of plasma in human Blood is _________?

• A. 50%
• B. 55%
• C. 60%
• D. 80%

Explanation: Plasma makes up approximately 55% of human blood, while blood cells and platelets together make up roughly 45%. This is why the two standard figures are usually given as 55% and 45%.

155. Which of the following is not a Fat-soluble vitamin?

• A. Vitamin A
• B. Vitamin B
• C. Vitamin D
• D. Vitamin E

Explanation: Vitamin B is water-soluble, whereas vitamins A, D and E are fat-soluble. Vitamin K is also fat-soluble, completing the common ADEK group.

156. Despite the fluctuation in human body temperature. The temperature of human body remains at _________?

• A. 35 °C
• B. 37 °C
• C. 42 °C
• D. 54 °C

Explanation: The normal average core temperature of the human body is about 37 °C, although it varies with time of day, activity and measurement site. The body maintains this narrow range through thermoregulation.

157. Who is the Father of Genetics?

• A. Gregor Mendel
• B. Alexendar
• C. Darewin
• D. Louis pasture

Explanation: Gregor Mendel established the basic laws of inheritance through his pea-plant experiments, so he is known as the father of genetics. His work introduced the ideas of dominant and recessive traits.

158. Which one of the following is not a true fruit?

• A. Apple
• B. Grapes
• C. dates
• D. plum

Explanation: An apple is a pome, an accessory fruit in which much of the fleshy edible portion develops from floral tissues other than the ovary. Grapes, dates and plums develop from the ovary and are true fruits.

159. Activity of Brain is recorded by ____________?

• A. ECG (Electrocardiogram)
• B. EEG (Electroencephalogram)
• C. X-Ray
• D. None of these

Explanation: An EEG records the brain's electrical activity through electrodes placed on the scalp. An ECG records the electrical activity of the heart.

160. Which element has the second most % in human body?

• A. Oxygen 65%
• B. Calcium 75%
• C. Hydrogen 10%
• D. Carbon 18%Science

Explanation: Carbon makes up roughly 18% of the body by mass, second only to oxygen at about 65%. Hydrogen is about 10%, so it ranks third among these major elements.