Exam 14: Dna: the Genetic Material

Xeroderma pigmentosum (XP)is a rare autosomal recessive disorder.Patients with XP exhibit a cellular hypersensitivity to ultraviolet (UV)radiation,a high incidence of skin cancer and premature aging.Based on these clinical characteristics,what is the most likely cause for this disease?

Deoxyribose has a carbon atom that is not part of the pentose ring.In a nucleotide,what is attached to this carbon?

Watson and Crick developed a model of DNA in which the two strands twist into the shape of a ________.

I think the proactive stance is a better attitude to promote than after-the-fact worrying! When planning a long week of sunbathing on the beach,What type of DNA damage should sunbathers be aware of before hitting the beach?

If a short sequence of DNA is 5' AATTGCCGT 3',its complement is

Which of the following DNA sequences is complementary to 5' ATGGTCAGT 3'?

In DNA,complementary nitrogen bases are held together by

You are asked to participate in a clinical trial for a new drug that can activate telomerase.Which of the following is a likely risk of such a drug?

________ is the genetic material for all cellular organisms and some viruses.

Eukaryotic organisms speed up the process of DNA replication by

The ends of linear chromosomes that maintain chromosome integrity are called

The method of DNA replication,where each original strand is used as a template to build a new strand,is called the

Information obtained by Franklin from X-ray crystallography on DNA suggested that it is shaped like a

After DNA replication is complete,each strand of the original molecule is bound to a new complementary strand.This process is known as

Based on their experiment with T2 bacteriophages,Hershey and Chase concluded that

Who proposed that in any DNA molecule,A = T and G = C?

If a mutation prevented synthesis of the beta subunit of DNA pol III,which would be most affected?

The replisome has two main subcomponents.They are

You are asked to give a classroom demonstration of DNA supercoiling.To do so,you take two different colored pieces of rubber tubing,twist them very tightly and excessively around each other and join the ends of the tubing appropriately.Next,you relieve the supercoiling by breaking one strand and unwinding it.In this demonstration,the breaking and unwinding to relieve the supercoiling simulates the action of

In 1952,Hershey and Chase confirmed Avery's (1944)conclusion that