The world’s forests are rapidly being lost to
a. fires.
b. fungal diseases.
c. logging.
d. hurricanes.
e. decrease in soil fertility.
C
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In cancer cells one allele of the tumor suppressor gene p53 is frequently mutated so that the protein is inactive, not produced, or deleted
The other allele will usually have a normal sequence and the promoter remains intact but the gene is not expressed. Sequencing with sodium bisulfite modification of DNA can be used to detect which cytosines are methylated. If the cancer cell DNA is sequenced what would be the anticipated results? A. Cytosines in or near the promoter region will be methylated B. Cytosines in or near the promoter will not be methylated C. Cytosines in the coding region will have an increased mehtylation D. There will be no differences in the methylation pattern of the promoter of p53 from a cancer cell and a normal cell
Asconoid sponges are usually the smallest of all sponges
Indicate whether the statement is true or false
Which of the following represents the chemical formula for urea?
a. H2N-CO-NH2 b. NH4Cl c. NH3 d. C5H4N4O3
The first steps in glycolysis involve
A. reducing glucose. B. both the addition of two phosphates to glucose, and then splitting glucose. C. adding two phosphates from ATP to glucose. D. splitting glucose into two, 3-carbon molecules. E. generation of ATP.