set 5 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 5 EXERCISES
The following question based on genetics, evolution of life & ecological biodiversity topic of general science mcq
(a) Beetle
(b) Ticks
(c) Honey bee
(d) Wasp
The correct answers to the above question in:
Answer: (b)
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Read more genetics evolution of life and ecological biodiversity Based General Science Questions and Answers
Question : 1
With reference to soil conservation, consider the following practices :
- Crop rotation
- Sand fences
- Terracing
- Wind breaks
a) 1, 3 and 4 only
b) 1, 2, and 3 only
c) 2 and 4 only
d) 1, 2, 3 and 4
Answer »Answer: (d)
Question : 2
Nucleotide arrangement in DNA can be seen by
a) Electron microscope
b) Ultracentrifuge
c) X-ray crystallography
d) Light microscope
Answer »Answer: (c)
In 1953 Wilkins obtained very fine X-ray crystallographic pictures of DNA from which Watson and Crick developed the double helix model of DNA.
Question : 3
The number of autosomes in human female ovum is
a) 12
b) 22
c) 11
d) 23
Answer »Answer: (b)
In human female ovum, number of autosome are 22 pairs.
Question : 4
The kind of evolution in which two species of different geneology come to resemble one another closely, is termed as
a) convergent evolution
b) parallel evolution
c) progressive evolution
d) retrogressive evolution
Answer »Answer: (a)
Progressive evolution is the development of organisms with more elaborate and specialized structures from those having less elaborate features e.g. amphibians from reptiles.
Retrogressive or degenerative evolution is the development of simpler forms from more complex ones. Such evolution has occurred in the case of vestigial organs, parasitic forms, and in the reduction of overspecialized structures such as wings in flightless birds.
Parallel evolution is the formation of similar traits in related groups of organisms independently due to similar requirements e.g. running of two-toed deer and one toed horse.
The evolution of wings in insects and birds serve as an example of convergent evolution.
Question : 5
Consider the following statements :
- The terms ‘gene’ and ‘allele’ were coined by Johansen.
- Chromosomal theory of inheritance was given by Sutton and Boveri.
- ‘One gene-one enzyme’ hypothesis was given by ‘Beadle and Tautum’.
a) 1 and 2
b) 2 and 3
c) 1, 2 and 3
d) None
Answer »Answer: (c)
The Boveri–Sutton chromosome theory or Chromosomal theory of inheritance is a fundamental unifying theory of genetics which identifies chromosomes as carriers of genetic material.
One gene one protein hypothesis was given by Beadle and Tatum which was later outdated after the discovery of alternate splicing.
Question : 6
One of the following is a very unique feature of the mammalian body
a) Rib cage
b) Presence of diaphragm
c) Four chambered heart
d) Homeothermy
Answer »Answer: (b)
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