Practice Quiz pdf set 2 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) A dihybrid condition is
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(b)
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(d)
Dihybrid condition involves simultaneous inheritance of two pairs of mendelian factors or genes.
Q-2) A nucleoside differs from a nucleotide in not having
(a)
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(d)
In a nucleotide, purine or pyrimidine nitrogenous base is joined by deoxyribose pentose sugar (D), which is further linked with phosphate (P) group to form nucleotides.
Q-3) Group of organisms that closely resemble each other and freely interbreed in nature, constitute a
(a)
(b)
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(d)
Q-4) Mutation rates are affected by
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(b)
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(d)
Q-5) Who proved that DNA is basic genetic material?
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(d)
Q-6) Consider the following statements about Progeria : - Progeria is the genetic disease associated with fast ageing.
- Progeria patients never live beyond early twenties.
- It happens due to point mutation replacing Cytosine by Thymine.
Which of the statement(s) given above is/are correct?
(a)
(b)
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Hutchinson–Gilford Progeria Syndrome is an extremely rare genetic disorder wherein symptoms resembling aspects of aging are manifested at a very early age. It is caused due to point mutation where cytosine is replaced by thymine.
Q-7) Herbarium is
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Herbarium is dry garden.
Q-8) Which one of the following processes of weathering belongs to both mechanical and chemical weathering?
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(d)
Crystallization processes of weathering belong to both mechanical and chemical weathering. Mechanical or physical weathering involves the breakdown of rocks and soils through direct contact with atmospheric conditions, such as heat, water, ice and pressure.
Chemical weathering - the process by which the internal structure of a mineral is altered by the addition or removal of elements.
Q-9) Initiation codons for protein synthesis are
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Eukaryotes use AUG as initiation codon while prokaryotes use AUG as well as GUG as start codons.
Q-10) The last chain of food are
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(d)