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CSAT Prelims Biology - General Knowledge Questions and Answers for UPSC Exam | Page-9

81 Most of the desert plants bloom during night time because
A The desert insects are active during night time
B The desert insects eat away flowers during day time
C They are sensitive to the phases of moon
D Their blooming is controlled by low temperature

Answer: Option [D]
82 Which organelle in the cell, other than nucleus contains DNA?
A Mitochondrion
B Golgi apparatus
C Centriole
D Lysosome

Answer: Option [A]
83 Which one of the following is a membrane that protects the developing embryo from desiccation?
A Chorion
B Yolk sac
C Amnion
D Allantois

Answer: Option [C]
84 Which of the following are associated with Diabetes mellitus, a common disease in adults?
I. Higher sugar level in blood
II. Lower sugar level in blood
III. Lower insulin level in blood
IV. Higher insulin level in blood

Select the correct answer by using the codes given below:

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

Answer: Option [D]
85 Corpus luteum is a mass of cells found in
A Brain
B Ovary
C Spleen
D Pancreas

Answer: Option [B]
86 Which of the following diseases of mulching animals are infectious?
I. Foot and mouth disease
II. Anthrax
III. Black Quarter
IV. Cowpox

Select the correct answer using the codes given below:

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

Answer: Option [C]
87 The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by
A the depletion of glucose
B a decrease in the supply of oxygen
C the accumulation of lactic acid
D minor wear and tear of muscle fibres

Answer: Option [C]
88 Consider the following animals of India:
I. Crocodile
II. Elephant

Which are these is/are endangered species?

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

Answer: Option [A]
89 Consider the following statements:
I. ELISA test is employed as the first and most basic test for an individual to detect cancer.
II. Almost 50% of human beings have Rh+ blood while the remaining have Rh- blood.

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]
90 At present, scientists can determine the arrangement or relative positions of genes or DNA sequence on a chromosome. How does this knowledge benefit us?
I. It is possible to know the pedigree of livestock.
II. It is possible to understand the causes of all human diseases.
III. It is possible to develop disease-resistant animal breeds.

Which of the statements given above is/are correct?

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

Answer: Option [D]


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