Gentics and Evoloution MCQ question and answer with solution

21

The type of mutants which have been most useful for dissecting the steps in the process of DNA replication, are the ones known as

A) Non-conditional mutants B) Conditional mutants C) Topoisomerases D) DNA junks

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Answer & Solution

Answer: Option B

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22

Which of the following will form a new species?

A) Interbreeding B) Random mating C) Connecting links D) Variations

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Answer & Solution

Answer: Option D

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23

The phenomenon of a single major gene influencing more than one character is known as

A) Expressibility B) Penetrance C) Pleiotropism D) Variability

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Answer & Solution

Answer: Option C

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24

The phenomena in which one gene controls two or more different characters simultaneously is called

A) apomixis B) pleiotropy C) polyploidy D) polyteny

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Answer & Solution

Answer: Option B

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25

According to the dispersive method of DNA replication,

A) Each strand of two double helices formed would have one old and one new strand B) Both the double helices formed would have new strands C) The DNA double helix would break at several points forming many pieces D) Both B and C

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Answer & Solution

Answer: Option C

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26

Match List-I (Biogeographical regions) with List-II (Locations) and select the correct answer:

List-I	List-II
a. Nearctic	1. Central South of America
b. Palearctic	2. Asia, south of Himalayas
c. Neotropical	3. North America down to the Mexican Plateau
d. Oriental	4. Asia North of the Himalayas, Europe and Africa, North of Sahara Desert

A) a-1, b-3, c-4, d-2 B) a-2, b-4, c-1, d-3 C) a-3, b-4, c-2, d-1 D) a-3, b-4, c-1, d-2

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Answer & Solution

Answer: Option D

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27

Number of chromosome in a normal human body cell is

A) 43 B) 44 C) 45 D) 46

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Answer & Solution

Answer: Option D

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28

Chromosomal abbreviation is commonly found in the

A) cancer cells B) normal cells C) healthy cells D) autosomal cells

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Answer & Solution

Answer: Option A

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29

Consider the following statements regarding satellite DNA and choose the correct answer:
1. Satellite or Repetitive DNA consists of short identical genes which are repeated in tandem several hundred or thousand times
2. Such DNA is found in the region of the chromosome adjacent to the centromere
3. It is easy to separate repetitive DNA by ultracentrifugation

A) Only 1 and 2 are true B) Only 2 and 3 are true C) Only 1 and 3 are true D) 1, 2 and 3 are true

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Answer & Solution

Answer: Option D

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30

In prokaryotes, multiple ribosomes (polysomes) participate in

A) translation process B) transcription process C) linkage D) crossing over

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Answer & Solution

Answer: Option A

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Gentics and Evoloution MCQ question and answer with solution | Biology Gk MCQs