Exam 14: From Dna to Protein: Gene Expression

A) It synthesizes mRNA in a 5´-to-3´ direction, reading the DNA strand 3´ to 5´.
B) It synthesizes mRNA in a 3´-to-5´ direction, reading the DNA strand 5´ to 3´.
C) It binds at the promoter and unwinds the DNA.
D) It does not require a primer to initiate transcription.
E) It uses only one strand of DNA as a template for synthesizing RNA.

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A) is different for prokaryotes and eukaryotes.
B) has changed during the course of recent evolution.
C) has 64 codons that code for amino acids.
D) has more than one codon for many amino acids
E) is ambiguous.

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A) N terminus to C terminus; 5´ to 3´
B) C terminus to N terminus; 5´ to 3´
C) C terminus to N terminus; 3´ to 5´
D) N terminus to C terminus; 3´ to 5´
E) N terminus to N terminus; 5´ to 5´

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A) Some RNAs have catalytic activity.
B) Not all proteins are enzymes.
C) Some enzymes are made up of more than one polypeptide.
D) Not all genes code for enzymes.
E) Not all enzymes are coded for by genes.

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A) Splicing of exons
B) Reverse transcription
C) Addition of a 5´ cap
D) Addition of a poly A tail
E) Intron removal

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A) 3´-to-5´; N; C
B) 5´-to-3´; N; C
C) 3´-to-5´; C; N
D) 5´-to-3´; C; N
E) 3´-to-5´; C; C

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A) 1; 4; 3; 2
B) 4; 3; 1; 2
C) 4; 1; 3; 2
D) 4; 1; 2; 3
E) 1; 2; 4; 3

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A) small proteins; translation
B) proteins and small RNAs; translation
C) proteins and tRNAs; transcription
D) proteins and mRNAs; translation
E) mRNAs and tRNAs; translation

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A) are not part of the genetic code.
B) bind tRNAs.
C) bind mRNA factor.
D) stop translation.
E) stop transcription.

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A) enzyme found in the nucleus of the cell that assists in the transfer of mRNA to the cytoplasm.
B) enzyme that adds the amino acid to the 3´ end of the tRNA.
C) enzyme found in the large subunit of the ribosome that catalyzes the formation of the peptide bond in the growing polypeptide.
D) RNA molecule that is catalytic.
E) Both c and d

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A) an RNA-directed DNA polymerase.
B) an RNA-directed RNA polymerase.
C) a DNA-directed RNA polymerase.
D) a typical enzyme.
E) a form of RNA.

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A) spliced out of the original transcript.
B) spliced together from the original transcript.
C) spliced to introns to form the final transcript.
D) much larger than introns.
E) larger than the original coding region.

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A) There are several different RNA polymerases in both prokaryotes and eukaryotes.
B) In eukaryotes, RNA polymerase requires transcription factors or initiation.
C) Prokaryotic genes are often grouped together.
D) In eukaryotes, the regulation of several genes at once requires common control elements in each of the genes.
E) There is a diversity of eukaryotic polymerases that is reflected in the diversity of eukaryotic promoters.

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A) 5´-TACTTTAGGATC-3´
B) 5´-ATGAAATCCTAG-3´
C) 5´-GATCCTAAAGTA-3´
D) 5´-TACAAATCCTAG-3´
E) 5´-CTAGGATTTCAT-3´

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A) 20
B) 23
C) 45
D) 60
E) 61

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A) Polyphenylalanine
B) Isoleucine-tyrosine-isoleucine-tyrosine
C) Isoleucine-isoleucine-isoleucine-isoleucine
D) Tyrosine-tyrosine-tyrosine-tyrosine
E) Aspargine-aspargine-aspargine-aspargine

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