bio 1 chapter 20

The sticky end of the DNA restriction fragment TGCA will pair with a DNA restriction fragment with the sticky end _____.

ACGT

This is a DNA fingerprint exhibiting samples from a victim, two suspects, and the crime scene. Which of these DNA fragments is common to both the victim and Suspect 1? They are in order as ABCDE

B (the second row)

This is a DNA fingerprint exhibiting samples from a victim, two suspects, and the crime scene. Which of these DNA fragments is common to both the victim and Suspect 2?

C (the third row)

Why is Suspect 1 considered more likely to have committed the crime than Suspect 2?

The crime scene sample contains DNA fragments from both the victim and Suspect 1.

Which of these is a symptom of vitamin A deficiency?

blindness

Bacteria containing recombinant plasmids are often identified by which process?

exposing the bacteria to an antibiotic that kills cells lacking the resistant plasmid

In 1997, Dolly the sheep was cloned. Which of the following processes was used?

fusion of an adult cell's nucleus with an enucleated sheep egg, followed by incubation in a surrogate

Why is golden rice pale yellow in color?

it is rich in beta carotene

The unpaired nucleotides produced by the action of restriction enzymes are referred to as _____.

sticky ends

What is the enzymatic function of restriction enzymes?

to cleave nucleic acids at specific sites