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CSAT Prelims Biology - General Knowledge Questions and Answers for UPSC Exam | Page-3

21 It is possible to produce seedless tomato fruits by
A spraying hormones on flowers
B spraying mineral solution on plants
C applying trace elements in tomato fruits
D applying fertilizers containing radioactive elements

Answer: Option [A]
22 “Athlete’s Foot” is a disease caused by
A Nematode
B Protozoan
C Fungus
D Bacteria

Answer: Option [C]


23 Which one of the following types of light are strongly absorbed by plants?
A Indigo and yellow
B Yellow and violet
C Violet and orange
D Blue and red

Answer: Option [D]
24 “It begins as a single cell and grows into a merciless disease that claims millions of lives year after year. But scientist are steadily unlocking its mysteries and the fight against it, may now have reached a dramatic turning point. New discoveries promise better therapies and hope in the war against ……… “. The disease referred to in the above quotation is
B Cancer
C Tuberculosis
D Alzheimer’s disease

Answer: Option [B]
25 Arteries supplying blood to the heart are called
A Hepatic arteries
B Pulmonary arteries
C Carotid arteries
D Coronary arteries

Answer: Option [D]
26 Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the phenomenon of
A total internal reflection
B diffraction
C polarization
D interference

Answer: Option [A]
27 In the context of organic evolution, the loss of limbs in snakes is explained by the phenomenon of
A natural selection
B use and disuse of organs
C adaption to living in burrows
D inheritance of acquired characters

Answer: Option [B]
28 What is the name of the vessel that delivers the nutrient/ rich blood from the stomach and small intestine to the liver?
A Hepatic vein
B Left hepatic artery
C Hepatic portal vein
D Right hepatic artery

Answer: Option [C]
29 Consider the following statements:
I. Non-functioning of lachrymal gland is an important symptom of deficiency of Vitamin A.
II. Deficiency of Vitamin B1 can lead to indigestion and heart enlargement.
III. Vitamin C deficiency can lead to pain in the muscles.
IV. Deficiency of Vitamin D causes increased loss of Ca++ in urine.

Which of the statements given above are correct?

A I and II
B II, III and IV
C I, III and IV
D I, II, III and IV

Answer: Option [D]
30 Consider the following statements:
I. Hepatitis B is several times more infectious than HIV/AIDS
II. Hepatitis B can cause liver cancer

Which of the statements given above is/are correct?

A Only I
B Only II
C Both I and II
D Neither I nor II

Answer: Option [C]

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