At around ___ weeks of fetal life, genes are activated that initiate sexual differentiation
A. 9 D. 21
B. 12 E. 25
C. 15
A
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Which would have the highest concentration of C-H bonds?
A. Cholesterol B. Saturated fat C. Unsaturated fat D. Trans fat
How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?
A. 0 because mRNA has only anticodons B. 6 C. 27 D. 9 E. 3
Serious detrimental affects of global warming include
a. intense rains and flooding. b. more frequent and intense droughts. c. rising sea levels in coastal areas. d. the disappearance of glaciers thus wiping out some fresh water supplies. e. all of these.
A single base mutation occurs in a gene that codes for a protein due to an error in DNA replication. Which of the following outcomes is not possible?
A) The mutation results in changed protein function. B) The mutation results in a longer or shorter protein or a protein of the same length. C) The mutation results in a human disease such as sickle-cell disease. D) The mutation results in mRNA being made from the protein.