Biology GK · all questions

Gentics and Evoloution
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Q101

The three nonsense codons are

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Q102

In terms of the evolution of organisms, which one among the following is the most avanced?

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Q103

DNA as genetic material was proved by

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Q104

Mendel selected garden pea as his experimental material because its advantages include:

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Q105

According to which of the following, meteorites travelling through the earths atmosphere are strongly incandescent only on the surface while the interior remains cold?

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Q106

The common mutagens used in mutation breeding are

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Q107

Who among the following for the first time made a definite distinction between heritable changes and those which can not be inherited?

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Q108

Consider the following statements.
1. Character are transferred from parents to progeny through DNA.
2. Coded information in nucleic acid depend upon arrangement of nucleotides.
Which of the statements given above is/are correct?

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Q109

According to Britten-Davidson (1969) operon-operator model, the regulation of gene expression in higher cells includes

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Q110

Which of the following rocks show almost no trace of life?

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Q111

During crossing over the breakage of chromatids and fusion of broken segments take place due to the action of

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Q112

Match List-I (RNA polymerase parts) with List-II (Functions) and select the correct answer:

List-I	List-II
a. Sigma factor	1. Ineffective in transcribing RNA, because it transcribes both strands
b. The core enzyme	2. Transcribes only one strand of the DNA template
c. The holozyme	3. Interacts with the core enzyme to form the complete enzyme
d. The β-subunit	4. Required for the interaction with the sigma factor

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Q113

Which of the following properties of protenoid micro spheres have revealed concentric double layered boundaries around them through which diffusion of material from the interior to the exterior occurs?

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Q114

According to the theory of abiogenesis, the coacervates turned into the first primitive living systems called

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Q115

According to which of the following theories, "the different stages in the development of an individual represent the different stages through which the race passed in the process of evolution"?

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Q116

The plant in which foreign gene (s) has / have been introduced is called

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Q117

Which of the following is actually a giant palindrome with its two halves virtually identical?

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Q118

Match the following columns:

Column I	Column II
a. Non-parental gene exchange	1. Crossing over
b. Non-sister chromatids	2. X and Y
c. Sex chromosome	3. Sex-linked disease
d. Haemophilia	4. Recombination

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Q119

A normal woman whose father was colourblind, is married to a normal man. The sons would be

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Q120

Biological concept of species is mainly based on

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