What component of the cell is the site of polypeptide assembly?
a. nucleus
b. mitochondria
c. vesicles
d. ribosome
e. lysosome
ANSWER: d
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The two strands of a DNA double helix are said to be antiparallel. This means that ____
a. the 5' end of one strand is directly paired with the 5' end of the other strand b. since the double helix twists, it is not perfectly parallel c. one strand has a negative charge and the other strand has a positive charge
d. the 5' end of one strand is directly paired with the 3' end of the other strand e. both strands have a negative charge
The anatomical structure identified with the letter
“A” in the figure above is a. the arterial wall. b. the lumen. c. atherosclerotic plaque. d. the capillary wall. e. none of these.
Ultraviolet irradiation is frequently used to sterilise medical supplies such as plastic tubing
a. true b. false
________ is the study of phenomena and mechanisms that cause chromosome-associated heritable changes to gene expression that are not dependent on changes in DNA sequence
A) Transmission genetics B) Population genetics C) Epigenetics D) Mutagenesis E) Preformation