At pH 7, a peptide with the sequence G-M-G-V-S-D-P-D-A has a net charge of:
A. -3
B. -2
C. -1
D. +1
E. +2
B
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Gierer and Schramm isolated ______ from tobacco mosaic virus and applied it to plant tissue, which caused the same types of lesions that occurred when plants were exposed to intact tobacco mosaic virus
A. RNA B. DNA C. proteins D. capsids
Prior to the 1940s, many biologists believed ____, which is composed of 20 different types of ____, was most likely the
genetic material.
a. protein; amino acids b. DNA; amino acids c. protein; nucleotides d. DNA; nucleotides e. RNA; nucleotides
Which of the following targets is NOT regulated by the autonomic nervous system?
A. skeletal muscles B. cardiac muscles C. glands of the body D. smooth muscles E. none of these
Of the following, which is used to inhibit specific enzymes in the treatment of many bacterial and viral diseases?
A) substrate analogues B) noncompetitive inhibitors C) denaturing agents D) allosteric regulation E) hydrogenases