A change in the number or structure of a chromosome is an example of a
a) beneficial mutation
b) harmful mutation
c) silent mutation
d) chromosomal mutation
Ans: d) chromosomal mutation
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Transformation in bacteria results from the uptake of which molecule?
A) RNA B) DNA C) lipid D) protein E) polysaccharide
The active ingredient in Ecstacy is
a. MDA. b. MDMA. c. MMA. d. LSD. e. STP.
Select the best response to the question. ?A person infected with Giardia should be treated with which of the following?
A) antibiotics after the culture and sensitivity report is obtained B) oxygen and inhaled medications C) fluids, electrolytes, and antimicrobials such as metronidazole D) no treatment is currently available
The three-dimensional coordinates of atoms within a folded protein are determined experimentally. After researchers obtain a protein's structural details, they can use different techniques to highlight particular aspects of the structure
What visual model best displays a protein's secondary structures (? helices and ? sheets)? (a) ribbon (b) space-filling (c) backbone (d) wire