Ch. 17 - Gene Expression: From Gene to Protein
Chapter 17, Problem 2
Which of the following is not true of a codon? a. It may code for the same amino acid as another codon. b. It never codes for more than one amino acid. c. It extends from one end of a tRNA molecule. d. It is the basic unit of the genetic code.
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Textbook Question
In eukaryotic cells, transcription cannot begin until a. the two DNA strands have completely separated and exposed the promoter. b. several transcription factors have bound to the promoter. c. the 5′ caps are removed from the mRNA. d. the DNA introns are removed from the template.
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Textbook Question
The anticodon of a particular tRNA molecule is a. complementary to the corresponding mRNA codon. b. complementary to the corresponding triplet in rRNA. c. the part of tRNA that bonds to a specific amino acid. d. catalytic, making the tRNA a ribozyme.
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Textbook Question
Which of the following is not true of RNA processing?
a. Exons are cut out before mRNA leaves the nucleus.
b. Nucleotides may be added at both ends of the RNA.
c. Ribozymes may function in RNA splicing.
d. RNA splicing can be catalyzed by spliceosomes.
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Textbook Question
Which component is not directly involved in translation? a. GTP b. DNA c. tRNA d. ribosomes
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