For tRNA to function in protein production, it must bind to both a _____ and an _____.
A) gene, amino acid
B) gene, anticodon
C) codon, amino acid
D) codon, anticodon
Answer: C) codon, amino acid
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Answer the following statements true (T) or false (F)
1. DNA helicase and topoisomerase are similar insofar as they promote the unwinding and uncoiling of DNA. 2. 35Sulfur (35S) would be a better isotope than 32phosphate (32P) to track DNA synthesis. 3. If the sequence for one strand of DNA is 3?-TCGATT-5' then its complementary strand would have a sequence of 3?-AGCTAA-5'. 4. Okazaki fragments are sequences of DNA most often found on the lagging strand of DNA during DNA replication. 5. The progressive shortening of telomeres in DNA correlates with cell senescence.
Cytotoxic T cells target
A) cancer cells and virally infected cells. B) skin cells and blood cells. C) bacterial cells and fungal cells. D) B cells and macrophages.
Transfers to and from environment reservoirs of
essential elements are __________ rates of exchange among organisms. a. much greater than b. somewhat greater than c. the same as d. somewhat slower than e. far slower than
A child is born with a lethal dominant allele. This would seem to be impossible since either parent,
had they possessed this allele, would have suffered its lethal effects. What is a possible explanation? A. The child's allele is a spontaneous mutation that neither parent had to deal with. B. The allele could have varying expressivity and not always be lethal. C. The allele could have delayed onset. D. All of these are possible. E. None of these is possible.