Which of the following is a start codon that is responsible for specifying the amino acid methionine?
a. AUG
b. AUA
c. AGA
d. AGU
a. AUG
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An organism's genome is analyzed and found to contain 18% thymine. What percentage of that organism's DNA is cytosine?
A. 32% B. 18% C. 82% D. 64% E. 36%
Which of the following might complicate the interpretation of ChIP-Seq data?
A. Because histones can be moved around or ejected from the chromatin, some DNA might not be sequenced if it is not wrapped around a histone B. DNA wrapped around nucleosomes can never be sequenced C. The regions of DNA wrapped around a histone is too long to be sequenced with current technologies D. The DNA between nucleosomes are too compacted to be sequenced
Mammals such as the vampire bat have the ability to generate a urine with a concentration of approximately 3,600 milliosmoles (mOsm). If the concentration of their blood is approximately 300 mOsm, by producing a concentrated urine, their water loss is
A. Reduced by approximately 11/12. B. Reduced by approximately ½. C. Actually increased by approximately ½. D. Reduced by approximately 5/6. E. Not reduced.
What is the primary function of the hormone ADH?
A. regulates biological rhythms B. mediates adaptation to long term stress C. stimulates bone breakdown D. conserves water by stimulating its reabsorption from urine E. inhibits loss of calcium from bone