31. The three-base sequence DNA that codes for an amino acid : 1180191

31. The three-base sequence DNA that codes for an amino acid : 1180191.



31. The three-base sequence on DNA that codes for an amino acid is called a(n) 
A. Codon
B. Exon
C. Anticodon
D. Intron
E. Triplet



32.  The RNA molecules that carry amino acids to the ribosomes during protein synthesis are called  
A.  Ribosomal RNA
B.  Messenger RNA
C.  Transfer RNA
D.  Primer RNA
E.  Ribozymes



33.  This molecule is synthesized as a copy of a gene on the DNA template strand  
A.  Ribosomal RNA
B.  Messenger RNA
C.  Transfer RNA
D.  Primer RNA
E.  Ribozymes



34.  RNA molecules differ from DNA molecules because only RNA  
A.  Has ribose
B.  Has uracil
C.  Is typically one strand of nucleotides
D.  Does not have thymine
E.  All of the choices are correct



35.  All of the following pertain to transcription except  
A.  Occurs on a ribosome in the cytoplasm
B.  Occurs before translation
C.  Requires RNA polymerase
D.  Requires a template DNA strand
E.  Is a process of protein synthesis



36.  The nontranscribed region of DNA to which RNA polymerase binds to nitiate transcription is called the  
A.  Promoter
B.  Operator
C.  Operon
D.  Exon
E.  Intron



37.  RNA polymerase binds to the  
A.  Start codon
B.  Termination sequence
C.  Regulation sequence
D.  Promoter sequence
E.  None of the choices are correct



38.  Which of the following is incorrect about transfer RNA?  
A.  Has a bottom hairpin loop with an anticodon
B.  An anticodon is complementary to a codon
C.  Contains a binding site for an amino acid
D.  The initiator tRNA that binds to the P site has the anticodon UAC
E.  Initiator tRNA in bacteria carries tryptophan



39.  If a codon for alanine is GCA, then the anticodon is  



40. The following pertain to ribosomes during protein synthesis except 
A. Contain codons within their rRNA molecules
B. Participate only in translation
C. Bind to the 5′ end of mRNA by their small subunit
D. Use their large subunit to supply enzymes for peptide bonding
E. Shift toward the 3’end of the  mRNA strand from one codon to the next



31. The three-base sequence DNA that codes for an amino acid : 1180191

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