DNA Evidence

How many different nitrogen bases are there found in DNA?

• 4

• 3

• 5

• 8

The first step in DNA replication for the gel electrophoresis is for a primase to unzip the double-stranded helix

• False

• True

The leading strand in DNA replication is oriented in the 5' to 3' direction.

• False

• True

Which of these DNA fragments for this electrophoresis sample is common to both the victim and suspect 1?

• B

• D

• E

• C

Which of these DNA fragments for this electrophoresis sample is common to both the victim and suspect 2?

• C

• D

• E

• A

Which suspect is more likely to have committed the crime?

• Suspect 1

• Suspect 2

Which suspects DNA matches the felons DNA at the crime scene?

• Suspect 1

• Suspect 2

• Suspect 3

• Keep looking, none of them match

DNA has a _______________ charge.

• negative

• positive

• equal

According to the rules of base pairing between complementary strands of DNA

• A pairs with C; and G pairs with T

• A pairs with C; and G pairs with U

• A pairs with G; and C pairs with T

• A pairs with T; and C pairs with G

The base pairs that hold together the complementary strands of DNA are linked together by

• hydrogen bonds

• nitrogenous bases

• phosphates

• enzymes