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14 Cards in this Set
- Front
- Back
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1) DNA affects the traits of an organism by providing the instructions for synthesizing
A) nucleotides B) amino acids C) proteins D) codons |
C |
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Messenger RNA molecules contain information that is used to
A) polypeptides B) nucleotides C) fatty acids D) amino acids |
A |
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To begin transcription, RNA polymerase must bind to a segment of DNA called the __
A) inducerB) promoterC) initiation siteD) transcription bubble E) primer |
B |
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During ________, a ribosome assembles a polypeptide whose amino acid sequence is specified by the nucleotide sequence in a molecule of mRNA.
A) translationB) transcriptionC) replicationD) posttranscriptional modification |
A |
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A codon is composed of how many bases?
A) one B) two C) three D) four E) 64 |
C |
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In eukaryotes, translation takes place
A) on the plasma membrane. B) on ribosomes.C) on the nuclear membrane. D) inside the nucleus.E) on spliceosomes. |
B |
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The A, P, and E sites are progressively occupied by amino acids being assembled into a polypeptide.
These sites are part ofA) tRNA.B) mRNA.C) the spliceosome.D) DNA.E) the large ribosomal subunit. |
E |
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In eukaryotic cells, transcription occurs
A) on the surface of the plasma membrane. B) on spliceosomes.C) inside the nucleus.D) on the surface of the nuclear membrane. E) on ribosomes. |
C |
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How many unique mRNA codons can be constructed from the four different RNA nucleotides?A) four B) 12 C) 16 D) 61 E) 64
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E |
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The tRNA nucleotide sequence that pairs with bases on the mRNA is called a(n) ____
A) intron.B) anticodon.C) codon.D) initiation factor. E) exon. |
B |
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Eukaryotic mRNA molecules may contain non-coding sequences that must be removed before translation. These are called
A) anticodons.B) noncodons.C) nucleosomes.D) introns.E) exons. |
D |
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The template strand of a DNA segment that codes for mRNA has the sequence: ATGCGT. Which tRNA anticodons would pair with the mRNA that is coded for by this sequence?
A) UAG CGU. B) UAC GCA. C) ATG CGT. D) AUG CGU. |
D |
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During protein synthesis in eukaryotes, which molecule passes from the nucleus to the cytoplasm and specifies the sequence of amino acids in the new polypeptide?
A) RNA polymeraseB) rRNAC) DNA D) tRNA E) mRNA |
E |
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If the genetic code were read in groups of two bases, how many different codons would be possible?
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16 |
