Cancer-causing mutations of the cell cycle ____
a. increase the speed of the cycle
b. cause the cell to bypass checkpoints in the cycle
c. eliminate one or more stages of the cycle
d. interfere with S phase of the cycle
e. stop the cycle and cause a build-up of cell toxins
b
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A peptide has the sequence NH2-phe-pro-lys-gly-phe-pro-COOH. Which of the following sequences in the coding strand of the DNA could code for this peptide?
A) UUU-CCC-AAA-GGG-UUU-CCC B) AUG-AAA-GGG-TTT-CCC-AAA-GGG C) TTT-CCC-AAA-GGG-TTT-CCC D) GGG-AAA-TTT-AAA-CCC-ACT-GGG E) ACT-TAC-CAT-AAA-CAT-TAC-UGA
Which structures would you find in a sac fungus?
(a) ascogonium, antheridium, zygospores. (b) ascospores, oogonia, asci, ascocarps. (c) basidia, basidiospores, basidiocarps. (d) ascogonia, asci, ascocarps, ascospores.
Which of the following is the main form of nitrogenous wastes released by aquatic invertebrates to
their environment?
a. nitrate b. ammonia c. uric acid d. amino acids e. urea
Eukaryotic chromosomes contain two general domains that relate to the degree of condensation. These two regions are ________
A) void of introns B) called heterochromatin and euchromatin C) separated by large stretches of repetitive DNA D) each void of typical protein-coding sequences of DNA E) uniform in the genetic information they contain