Most enzymes function best at
A. acidic pH and high salt concentrations.
B. basic pH and low salt concentrations.
C. neutral pH and high salt concentrations.
D. slightly above pH 7 and low salt concentrations.
D
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Determining the exact nucleotide sequence of a gene or gene fragment obtained from an unknown organism is based on which of the following methods?
a. Hybridization b. Sequencing c. Amplification (PCR) d. Genotypic
Which mechanism is the least likely explanation for high chromosome numbers in ferns?
a. dysploidy b. polyploidy c. increased independent assortment d. increased recombination rates e. homospory
Fungi are genetically most closely related to
a. ferns. b. flowering plants. c. algae. d. animals. e. none of these.
Down syndrome is associated with which of the following karyotypes?
a. 47, XXY b. 47, XXX c. 46, XY d. 47, XY, trisomy 21