Chapter 17 Questions

A particular triplet of bases in the template strand of DNA is 5′-AGT-3′. What would be the corresponding codon for the mRNA that is transcribed? A) 3′-UCA-5′ B) 3′-UGA-5′ C) 5′-TCA-3′ D) 3′-ACU-5'

A) 3′-UCA-5′

The genetic code is essentially the same for all organisms. From this, one can logically assume which of the following statements to be true? A) A gene from an organism can theoretically be expressed by any other organism. B) DNA was the first genetic material. C) The same codons in different organisms translate into different amino acids. D) Different organisms have different types of amino acids.

A) A gene from an organism can theoretically be expressed by any other organism.

Which of the following molecular structures contain codons? A) a protein B) mRNA C) tRNA D) rRNA

B) mRNA

Which of the following processes occurs in eukaryotic gene expression? A) mRNA, tRNA, and rRNA are translated. B) RNA polymerase binds to the terminator sequence. C) A cap is added to the 5′ end of the mRNA. D) RNA polymerase requires tRNA to elongate the molecule.

C) A cap is added to the 5′ end of the mRNA.

Which one of the following structures, if missing, would usually prevent translation from starting? A) exon B) 5′ cap C) AUG codon D) poly-A tail

C) AUG codon

Which of the following sequences of nucleotides are possible in the template strand of DNA that would code for the polypeptide sequence Phe-Leu-Ile-Val? A) 5′-TTG-CTA-CAG-TAG-3′ B) 5′-AUG-CTG-CAG-TAT-3′ C) 3′-AAA-AAT-ATA-ACA-5′ D) 3′-AAA-GAA-TAA-CAA-5′

D) 3′-AAA-GAA-TAA-CAA-5′

A particular triplet of bases in the coding sequence of DNA is AAA. The anticodon on the tRNA that binds the mRNA codon is ________. A) TTT B) UUA C) UUU D) AAA

D) AAA

The genetic code is redundant. What is meant by this statement? A) A single codon can specify the addition of more than one amino acid. B) The genetic code is different for different domains of organisms. C) The genetic code is universal (the same for all organisms). D) More than one codon can specify the addition of the same amino acid.

D) More than one codon can specify the addition of the same amino acid.