[MCQ]Biology MCQs For WBCS Exam||SET 20

 

 Biology MCQs For WBCS Exam

WBCS BIOLOGY MCQ Q1. 

A normal man respires in a minute

(a) 10—15 times

(b) 14—18 times

(c) 20—25 times

(d) 25—30 times

Ans. (b)

WBCS BIOLOGY MCQ Q2. 

Osmoregulation is control over the

(a) Removal of nitrogen from the body

(b) Concentrations of salt and water in the body

(c) Osmotic properties of cell membranes

(d) PH of the blood

Ans. (b)

WBCS BIOLOGY MCQ Q3. 

Lungs have a large number of alveoli for

(a) Having spongy texture and proper shape .

(b) More surface area for diffusion of gases

(c) More space for increasing volume of inspired air

(d) More nerve supply

Ans. (b)

WBCS BIOLOGY MCQ Q4. 

A Malpighian tubule empties urine into the

(a) Gut

(b) Coelom

(c) Lymph

(d) Ureters

Ans. (a)

WBCS BIOLOGY MCQ Q5. 

Which one of the following events takes place during inspiration in man?

(a) The internal intercostals muscles relax

(b) Due to contraction of external intercostals muscles and flattening of diaphragm the volume of

thoracic cavity increases

(c) Due to contraction of external intercostals muscles, and flattening of diaphragm the volume of

thoracic cavity decreases

(d) The abdominal muscles contract

Ans. (b)

WBCS BIOLOGY MCQ Q6. 

In insects, Malpighian tubules drain materials directly from the

(a) Gut

(b) Haemocoel

(c) Spider

(d) Jelly fish

Ans. (b)

WBCS BIOLOGY MCQ Q7. 

Kidneys are not only organs of excretion. Their work is supplemented by

(a) Liver

(b) Heart

(c) Large intestine

(d) Skin

Ans. (a)

WBCS BIOLOGY MCQ Q8. 

During inspiration, as a result of contraction of muscles attached to it, the diaphragm

(a) becomes dome-shaped

(b) Flattens

(c) Rotates

(d) Flattens and rotates

Ans. (b)

WBCS BIOLOGY MCQ Q9. 

Forced deep breathing for a few minutes by a person sitting at rest may be followed by a temporary cessation of breathing. This is due to

(a) Too much oxygen in blood

(b) Too much carbon dioxide in blood

(c) Both, too much oxygen and very little carbon dioxide in blood

(d) Little carbon dioxide in blood

Ans. (d)

WBCS BIOLOGY MCQ Q10. 

The conversion of protein waste, the ammonia into urea occurs mainly in

(a) kidney

(b) Lungs

(c) Liver

(d) Intestine

Ans. (c)

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⚡BIOLOGY MCQs SET 19[PREV]

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