set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

What is the pH level of blood of a normal person?

a) 6.45-6.55

b) 7.35-7.45

c) 4.5-4.6

d) 8.25-8.35

Question : 2

When there is a decrease in the concentration of oxygen in the blood, the rate of breathing

a) Increases

b) Does not change

c) Decreases

d) First decreases, then increases

Question : 3

A married couple adopted a male child. A few years later, twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive and O positive. The blood group of the adopted son is

a) A positive

b) B positive

c) O positive

d) Cannot be determined on the basis of the given data

Question : 4

Biological Oxygen Demand (BOD) is a standard criterion for

a) Computing oxygen levels in forest ecosystems

b) Pollution assay in aquatic ecosystems

c) Measuing oxygen levels in blood

d) Assessing oxygen levels in high altitude regions

Question : 5

An antigen is a substance which

a) Is used to treat poisoning

b) Lowers body temperature

c) Destroys harmful bacteria

d) Stimulates formation of antibody