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) Shark
(b) Bat
(c) Pigeon
(d) Vulture
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
Sex-determination by environmental factors is commonly observed in
a) Melandrium album
b) Mirabills jalapa
c) Drosophila melanogaster
d) Bonellia viridis
Answer »Answer: (d)
The Green Spoonworm (Bonellia viridis) is a marine worm noted for displaying exceptional sexual dimorphism due to environment factors.
Question : 2
Consider the following statements :
- Test is used to determine an unknown genotype within one breeding generation.
- Test cross is a cross between $F_1$ hybrid and dominant parent.
- Test cross is a cross between $F_1$ hybrid and recessive parent.
a) 3 only
b) 2 only
c) 1 only
d) 1, 2 and 3
Answer »Answer: (b)
Test Cross involves the breeding of a dominant trait individual with a homozygous recessive individual, in order to determine the zygosity of the former by analysing proportions of offspring with the recessive phenotype.
Question : 3
Which of the following is the X-linked genetic disease?
a) Martin-Bell syndrome
b) Daltonism or colour blindness
c) Duchenne’s muscular dystrophy
d) Both (a) and (b)
Answer »Answer: (d)
Colour blindness is the most common sex-linked genetic disorder, which is also expressed in recessive conditions.
Duchenne’s Muscular Dystrophy is caused by the “Dystrophin” gene which is the longest gene with 24,000 kbp in the human genome.
Question : 4
Polar bears are carnivores and prey on many arctic birds and fishes. However, under natural conditions, no one found polar bears predating any penguin. This is because
a) polar bears and penguins never coexist under natural conditions. The former lives in the North Pole while the latter lives in the South Pole
b) penguins have chemical substance in their muscles which is toxic to polar bears
c) penguins are gregarious and always move in groups. Therefore, a polar bear cannot approach them
d) None of these
Answer »Answer: (b)
Question : 5
Organisms which display properties of both living and non-living are
a) Lichens
b) Viruses
c) Diatoms
d) Bacteria
Answer »Answer: (b)
Question : 6
A modification of leaf is
a) Cladode
b) Tendrils
c) Phylloclade
d) Corm
Answer »Answer: (b)
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