Recent questions in Genetics and Evolution

Which of these would not be likely to increase differences between populations?

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Evolution is principally a process of

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Which of the following is vestigial in humans?

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Which one of the following set of structures includes only analogus organs?

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Homologus structures have

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The first horse like animal from which the modern horse Equus has evolved , Oligocene was the

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During fossil formation, the soft part decompose and harder ones are infiltrated by minerals and turn into stony shapes. This type of fossil is known as

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Two geographical regions separated by high mountains are

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Carboniferous period of coal deposition was

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Fossils are now dated by

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Russian scientist who proposed the theory of origin of life was

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In what ways were conditions on early Earth different from those on Modern earth?

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Believers of spontaneous generation theory assumed that

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The presence of two chambered heart in tadpole of frog gives support to the theory of

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Genetic divergence of two populations can be countered by

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The resemblance between different groups due to common function or adaptation may be referred to as an example of

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The essence of Haeckel’s recapitulation theory is

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Which of the following is a vestigial organ in the human body?

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Which of the following is the evidence of evolution?

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The origin of first mammals occurred

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The earliest era in the geologic record is the

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In their laboratory simulation of early Earth, Urey and Miller observed the abiotic synthesis of

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Fossil X is older than fossil Y because

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Study of fossils is known as

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A fossil is a

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The first organisms were

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The English scientist who worked for the Origin of the life and settled in India?

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According to scientists, the Big Bang theory occurred approximately ________ years ago

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Which one of the following gases were not present in the free form at the time life originated on earth?

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Earth originated

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Most promoter sites for RNA polymeraseII have conserved sequence located about 25-35 bp upstream of the transcriptional start site known as

asked Apr 3, 2014 by pady_1

1 answer

In eukaryotic cell, RNA is synthesized by how many RNA polymerases ?

asked Apr 3, 2014 by pady_1

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In which condition, a trp repressor protein is synthesized but doesnt bind to the trp operator and thus trp operon is transcribed to produce enzymes that synthesize tryptophan for the cell ?

asked Apr 3, 2014 by pady_1

1 answer

Expand IPTG

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1 answer

Who proposed the operon model for the regulation of transcription ?

asked Apr 3, 2014 by pady_1

3 answers

In which condition, the level of intracellular cAMP rises, CRP-cAMP complex is formed that stimulates transcription of the lac operon by using lactose as an alternative carbon source ?

asked Apr 3, 2014 by pady_1

2 answers

IPTG or allolactose in the process of lac operon is used as an

asked Apr 3, 2014 by pady_1

1 answer

Transcription of the operon is controlled by the lac repressor protein encoded by which gene ?

asked Apr 3, 2014 by pady_1

1 answer

The lac operon is transcribed by RNA polymerase to produce a ___________.

asked Apr 3, 2014 by pady_1

1 answer

$\beta$-galactosidase, galactose permease and thiogalactoside transacetylase are encoded by which of the following lac operon genes respectively?

asked Apr 3, 2014 by pady_1

1 answer

DNA replication occurs only in which phase ?

asked Apr 3, 2014 by pady_1

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Which protein helps in preventing the single stranded regions to base pair again, so that each of the two DNA strands is accessible for replication?

asked Apr 3, 2014 by pady_1

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During DNA replication in bacteria, the unwinding of the double helix (using ATP as energy source) is done by

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Which precursor is needed by DNA polymeraseI, during addition of dNTPs (dATP, dGTP, dTTP and dCTP) to the 3' OH end of the DNA chain ?

asked Apr 3, 2014 by pady_1

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E. coli DNA polymerases II and III lack which activity ?

asked Apr 3, 2014 by pady_1

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The primer used during DNA synthesis, is a short piece of RNA and is synthesized by RNA polymerase called

asked Apr 3, 2014 by pady_1

1 answer

Eukaryotic DNA replication is ________ in nature.

asked Apr 3, 2014 by pady_1

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Nucleosomes are organized into ____ diameter fiber.

asked Apr 3, 2014 by pady_1

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Nuclear DNA- protein complex is called

asked Apr 3, 2014 by pady_1

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Histone proteins are _______ in nature.

asked Apr 3, 2014 by pady_1

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