Knowledge of the cell cycle has led to improved means of treating cancer. The drug 5-fluorouracil blocks the synthesis of thymine. This drugs inhibits the cell cycle at the end of

a. G1.
b. G2.
c. S.
d. prophase.
e. metaphase.


Answer: b. G2.

Biology & Microbiology

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When the results of a GWAS experiment using 500,000 SNPs are plotted in a Manhattan plot, significantly associated SNPs are

A) data points with a ?log (p value) less than 0.05. B) data points with a ?log (p value) greater than 7. C) data points with a ?log (p value) greater than 7 that fall within a known coding sequence. D) any data points above the line of correlation.

Biology & Microbiology

Polycystic kidney disease results in kidney failure due to ____

a. compression of nephrons b. compression of the glomerulus c. swelling of nephrons d. swelling of the glomerulus e. blocking aquaporins

Biology & Microbiology

Approximately what percent of the total number of plant species have had their genomes partially or

fully sequenced?

a. 0.01% d. 10% b. 0.10% e. 50% c. 1%

Biology & Microbiology

In human prenatal development, cleavage

occurs in the

a. cervix. b. upper part of the uterus. c. vagina. d. oviduct. e. ovary.

Biology & Microbiology