Which DNA damaging agent can transfer methyl groups (—CH3) to the nucleotide bases in DNA?
a. UV light
b. Chemicals in tobacco smoke
c. Ionizing radiation
d. X-rays
e. Free radicals
b
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When the population growth of the prey = 0, is the predator population increasing or decreasing?
a. It is always decreasing. b. It is always increasing. c. At the left point it is increasing and at the right point it is decreasing. d. At the right point it is decreasing and at the left point it is increasing.
The Transcription Complex
What will be an ideal response?
Which of the following is not used in PCR amplification of DNA?
A) Double-stranded DNA template B) Oligonucleotide primers C) DNA polymerase D) Buffer E) ddNTPs
Amphibians gave rise to the successful land dwellers, the ________, about 300 million years ago.
Fill in the blank(s) with the appropriate word(s).