Question

Question 25

An enhancer is a _____ that _____ the rate of transcription

a.		cis-acting element, decreases
b.		cis-acting element, increases
c.		trans-acting factor, increases
d.		trans-acting factor, decreases

Question 29

The RNA transcript is complimentary to

a.		Termination sequences
b.		The coding strand of DNA
c.		Regulatory sequences
d.		The template strand of DNA

Question 31

What are telomeres?

a.		the ends of linear chromosomes
b.		enzymes that elongate the DNA strand during replication
c.		the structures that hold two sister chromatids together
d.		the sites of origin of DNA replication

Answer 1

25.

Enhancers are cis-acting elements on the same DNA which increase the rate of transcription. The enhancer may be present down stream or up stream or with in the intron. Enhancers bind to activator proteins which by recruting enzymes enhance transcription.

Option 'b' is the right one.

29.

RNA transcript is complimentary to template strand of DNA. The strand which actually codes the RNA is the template strand and the other strand is coding strand. RNA transcript and coding strand are similar to each other excepting that U replaces T in RNA.

Option 'd" is the right one.

31.

Telomeres are the two ends of the linear chromosomes. The linear chromosomes are present in all eukaryotic cells. Prokaryotes do not have linear chromosome, they have circular chromosomes. So circular chromosomes do not have telomeres.enhancer is cis-