Exam 8: What Genes Are

When studying genomes of organisms,scientists often will only list the sequence of a single strand.Explain why the sequence of the second strand would be unnecessary information.

A chemical that disrupts hydrogen bonds is added to a test tube containing DNA.What would be the result of this reaction?

A mutation is due to the addition of two bases in a strand of DNA.This is called a(n)________.

MATCHING Put the following in order from smallest to largest. -This is the next larger.

Replication of DNA cannot begin until

The enzyme that copies DNA is called ________.

In the first step of the polymerase chain reaction (PCR),the two strands of the DNA being amplified must be separated by exposing the DNA to high ________.

A protein binds to the outside of a DNA strand.This protein does NOT likely bind to the ________ of the DNA nucleotides.

The sequence of DNA differs among individuals within a species.This is the basis for

A scientist is interested in studying the mechanism of horizontal gene transfer.

A strand of DNA has the sequence GCAATTCG.The sequence of the complementary strand is ________.

Which of the following will NOT generally cause mutations?

Being in the sun for short stretches of time is not as likely to cause mutations as is being in the sun for long stretches of time.Explain why longer exposure to UV is more likely to cause mutations.

The significance of specific base pairing in DNA is that

What part of a nucleotide accounts for the genetic variation between individuals?

MATCHING Put the following in order from smallest to largest. -This is the next larger.

What would be the result if DNA polymerase did not have the ability to proofread?

The following figure illustrates DNA undergoing replication.The region indicated by the arrow in this image represents a

This figure shows a short sequence of DNA.During DNA replication,the piece of DNA depicted in this figure will produce

The polymerase chain reaction (PCR)technique could be developed only after the discovery of bacterial enzymes that were able to withstand high temperatures.Why was it necessary to use such enzymes?