Question

1) Which of the following enzymes is capable of initiating DNA synthesis on a template:

		DNA polymerase I
		DNA polymerase II
		DNA polymerase III
		all of these are correct
		None of these are correct

2) In garden peas, yellow seed color is dominant over green seed color. A total of 4,092 offspring resulted in a cross between a heterozygous yellow and a homozygous green. Howmany of these seeds are homozygous green?"

		"4, 092"
		"3,069"
		"2,046"
		"1,023"
		None of these are correct

3) "The term used to describe the complex of proteins, including DNA polymerase that assembles at the bacterial replication fork to synthesize DNA is"

holoenzyme

replisome

ribosome

nucleosome

None of these are correct

4) Independent assortment may be defined as the random distribution of unlinked genes into gametes. True or False?

5) Which of the following refers to the right-hand helix?

		Z-DNA
		B-DNA
		DNA backbone
		Replication fork
		density measures

6)

The class of enzymes that facillitates the unwinding of the double helix structure of the DNA is called:

		topoisomerase
		RNA polymerase
		DNA polymerase III
		DNA polymerase I
		None of these are correct

7)

The bacteriophage experiments carried out by Hershey and Chase:

		used 35S to label proteins and 32P to label viral DNA
		had shown that the protein coat of the phage stays outside the cell
		provided evidence that DNA directs phage multiplication
		all of these are correct
		None of these are correct

8)

The stored chemical information in DNA is collectively referred to as an organism's

		genotype
		phenotype
		karyotype
		all of these are correct
		None of these are correct

9)

During Prophase of mitosis

		the centrioles migrate to opposite ends of the cell
		spindle fibers form that run between poles of the cell
		spindle fibers attach to the kinetochore associated with the centromere
		A + B are correct
		None of these are correct

10) In the formation of gametes, the paired hereditary determinants separate, such that each gamete is equally likely to contain either one. This is Mendel's Principle of Segregation. True or False?"

Answer 1

1. DNA polymerase III, is the enzyme primarily responsible for replicative DNA synthesis.

2. Answer-2046, if we make a cross between a heterozygous yellow (Rr) and a homozygous green(rr) we will get 50% heterozygous yellow and 50% homozygous green. Then, homozygous green seeds will be 2046.

3. Replisome,

It is a large protein complex that carries out DNA replication, starting at the replication origin. It contains several enzymatic activities, such as helicase, primase and DNA polymerase and creates a replication fork to duplicate both the leading and lagging strand.

4. True

5. B DNA is right handed

6.Topoisomerases are enzymes that participate in the overwinding or underwinding of DNA.

7. All of the statements are correct.

8. Genotype is an individual's collection of genes

9. A and B are correct.

10. True, Principle of Segregation describes how pairs of gene variants are separated into reproductive cells.