Match the following

Column I	Column II
A) G-bands	i) viewing the chromosomes under ultraviolet light results from differences in the relative amounts of cytosine–guanine (C–G) and adenine–thymine base pairs
B) R-bands	ii) which are regions of DNA occupied by centromeric heterochromatin
C) Q-bands	iii) staining the telomere DNA  specifically
D) C-bands	iv) distinguish areas of DNA that are rich in adenine–thymine (A–T) base pairs
E) T-bands	v) reverting the dark bands by using saltingout method

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#Question id: 26991

#Unit 10. Ecological Principles

The patches of metapopulation  will stabilized over time if____

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#Question id: 19904

#Unit 12. Applied Biology

Which one of the following is a disadvantage of ISFET?

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#Question id: 11837

#Unit 6. System Physiology – Plant

Which of the following given hormones are involved in the  evolutionarily related to bacterial two-component histidine kinases?

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#Question id: 16126

#Unit 13. Methods in Biology

2 You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS, that could explain the effect of the gln2– and gln3– mutations on the regulation of GLN1.

The GLN1 gene shows a rather complex regulation in response to different amino acids. When either glutamate (glu) or glutamine (gln) is added to the medium, the amount of GS expression diminished and when both glutamate and glutamine are added to the medium GS expression is shut off completely. The effects of different mutants on the response to glu and gln are shown below.

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#Question id: 3290

#Unit 11. Evolution and Behavior

Dog breeders maintain the purity of breeds by keeping dogs of different breeds apart when they are fertile. This kind of isolation is most similar to which of the following reproductive isolating mechanisms?