Most gastric ulcers are caused by
A) overuse of aspirin and/or ibuprofen.
B) excessive mental stress.
C) bacteria.
D) overconsumption of alcohol.
Answer: C
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In medicine, agriculture, and conservation applications of biotechnology, the common genetic unit used is the
A. allele. B. gene. C. centromere. D. nucleotide (nitrogen base). E. chromatid.
____________________ is a substance released from metabolically active muscle and its concentration in the blood
can be used to assess kidney function. Fill in the blank(s) with the appropriate word(s).
An organic molecule with the formula C6H12O6 may have many structural formulae. These different three-dimensional forms of the same molecule are known as
A. isomers. B. isotopes. C. isotones. D. All the choices are correct.
Proteins are catabolized by hydrolytic cleavage to amino acids by the action of enzymes called ________.
Fill in the blank(s) with the appropriate word(s).