For polymerase chain reaction to occur,
a. isolated DNA molecules must be primed.
b. all DNA fragments must be identical.
c. the DNA must be separated into single strands.
d. a "sticky end" must be available for the ligase enzyme to function.
e. isolated DNA molecules must be primed and the DNA must be separated into single
strands.
E
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Scientists isolate cells in various phases of the cell cycle. They find a group of cells that have times more DNA than G1 phase cells. The cells of this group are _____
A) between the G1 and S phases in the cell cycle B) in the G2 phase of the cell cycle C) in the M phase of the cell cycle D) in the S phase of the cell cycle
What is the only known eusocial mammal?
A. humans B. naked mole rats C. Belding's ground squirrels D. prairie dogs E. honeybees
Which of these hormones can diffuse through the plasma membrane?
a. polypeptide b. epinephrine c. thyroxine d. norepinephrine
A patient with which blood type can receive blood from any donor?
A) type A B) type B C) type AB D) type O