Mutation rates of human genes are expressed as the number of ____
a. nucleotides substitutions per gene
b. frameshift mutations per genome
c. mutated alleles per genome
d. induced mutations per generation
e. mutated alleles per gene in each generation
e
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Cytotoxic T cells destroy cancerous cells by
A. forming the membrane attack complex. B. releasing vesicles containing perforin. C. activating natural killer cells. D. opsonization. E. secreting cytokines.
A naturally occurring, small, circle of DNA used as a vector to transmit DNA is a
A) plasmid. B) prion. C) lipofectin. D) ring chromosome.
The four nucleotide bases found in DNA are identical to those in RNA.
Answer the following statement true (T) or false (F)
A possible explanation for a natural event, based on observations and past knowledge, is a
What will be an ideal response?