CSAT Prelims Biology - General Knowledge Questions and Answers for UPSC Exam | Page-11

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Questions
101 Which one of the following is a modified stem?
A Coconut
B Carrot
C Potato
D Sweet potato

Answer: Option [C]
102 Canola refers to special type of oil seed mustard varieties bred for human consumption. The main characteristic of these varieties is that the
A oil has long shelf-life
B seeds have very high oil content
C oil has very low erucic acid content
D oil is rich in unsaturated fatty acids

Answer: Option [D]
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103 Haemophilia is a genetic disorder which leads to
A decrease in WBC
B rheumatic heart disease
C non-clotting of blood
D decrease in haemoglobin level

Answer: Option [C]
104 Consider the following statements:
I. Dengue is a protozoan disease transmitted by mosquitoes.
II. Retro-orbital pain is not a symptom of dengue.
III. Skin rash and bleeding from nose and gums are some of the symptoms of dengue.

Which of the statements given above are correct?

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

Answer: Option [B]
105 Which one among the following is not a good source of nutritional calcium?
A Ragi
B Rice
C Egg
D Skimmed milk

Answer: Option [A]
106 In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the
I. decomposer microorganisms to the surface.
II. nutrients to the surface.
III. bottom-dwelling organisms to the surface.

Which of the statements given above is/are correct?

A I only
B II only
C II and III
D III only

Answer: Option [C]
107 What is the pH level of blood of a natural person?
A 4.5 - 4.6
B 6.45 - 6.55
C 7.35 - 7.45
D 8.25 - 8.35

Answer: Option [C]
108 Consider the following statements:
I. Biodiversity hotspots are located only in tropical regions.
II. India has four biodiversity hotspots i.e., Eastern Himalayas, Western Himalayas, western Ghats and Andaman and Nicobar Islands.

Which of the statements given above is/are correct?

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

Answer: Option [D]
109 Due to their extensive rice cultivation, some regions may be contributing to global warming. To what possible reason/reasons is this attributable?
I. The anaerobic conditions associated with rice cultivation cause the emission of methane.
II. When nitrogen based fertilizers are used, nitrous oxide is emitted from the cultivated soil.

Which of the statements given above is/are correct?

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

Answer: Option [C]
110 Consider the following
I. Rice fields
II. Coal mining
III. Domestic animals
IV. Wet lands

Which of the above sources of methane, a major greenhouse gas?

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

Answer: Option [D]

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