A class of mutations that results in multiple contiguous amino acid changes in proteins is likely to be which of the following?
A) frameshift B) transition C) base analog D) recombinant E) transversion
A
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The molecule shown above is ____, having ____
a. unsaturated; a carbon-carbon double bond b. saturated; a carbon-carbon double bond c. unsaturated; no carbon-carbon double bonds d. saturated; no carbon-carbon double bonds e. saturated; a carbon-carbon triple bond
The first peptide hormone discovered in plants was ____, which functions in wound response in the
tomato.
a. cytokinin b. systemin c. gibberellin d. jasmonate e. salicylic acid
During the pre-embryonic period, a single sperm passes through the zona pellucida. In the vast majority of cases, where does this process occur?
A) in the oviduct (fallopian tube) B) in the placenta C) in the uterus D) in the ovary
Studies conducted with a lysozyme mutant that contains an Asp->Asn change at position 52 and a Glu->Gln change at position 35 exhibited almost a complete loss in enzymatic activity
What is the most likely explanation for the decrease in enzyme activity in the mutant? (a) increased affinity for substrate (b) absence of negative charges in the active site (c) change in the active-site scaffold (d) larger amino acids in the active site decreases the affinity for substrate