Which of the following sulfur species is
highly toxic?
a. hydrogen sulfide
b. dimethylsulfide
c. elemental sulfur
d. calcium sulfate
Answer: A
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A long-term goal(s) of the bioinformatic analysis of a pathogenic bacterium is ________.
A. identification of molecules that could be used as targets by antimicrobial agents, or develop or improve a vaccine B. identification of molecules that could be used to treat genetic disorders C. identification of molecules that can be passed to a new host D. assembly of accurate and complete genomic nucleotide sequences
Cis and trans isomers can be referred to as geometric isomers.
a. true b. false
Which of the following types of mutation, resulting in an error in the mRNA just after the AUG start of translation, is likely to have the most serious effect on the polypeptide product?
A) a deletion of a codon B) a deletion of two nucleotides C) a substitution of the third nucleotide in an ACC codon D) a substitution of the first nucleotide of a GGG codon
If the individuals of a species are likely to live until old age, that species exhibits a(n) ________ survivorship curve
A) declining B) S-shaped C) late-loss D) constant-loss E) early-loss