Question

1) Beside the distortion in the DNA backbone caused by a mismatched base pair, what additional mark is there on eukaryotic DNA to indicate which strand needs to be repaired?

a) a nick in the template strand

b) a chemical modification of the new strand

c) a nick in the new strand

d) a sequence gap in the new strand

2) Animal cloning using embryonic stem cells (ESC) has a much higher success rate than normal cloning using somatic cell nuclear transfer. However, unlike normal cloning, cloning using embryonic stem cells requires:

a) two separate enucleated egg cells

b) an animal fetus as the donor of the genome to be cloned

c) implantation of the cloned blastocyst into a mother animal

d) a living sperm cell to fertilize the cloned nucleus

e) isolation of 2 separate blastocysts from the mother animal

3) In terms of genome organization, a “locus” is best defined as:

a) an allele

b) a position on a chromosome

c) a specific sequence of DNA

d) a winged insect known to cause crop damage

e) different flavors of ice cream

Answer 1

Answer to question 1- a nick in the new strand

As a result i t will be caught during proof reading and will be modified

Question 2- an animal fetus as the donor of the genome to be cloned

Here mucleus from on e species fuses with the egg of the another species

Question 3-a positon on a chromosome

The positon is normally fixed

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