Question

33. Consider the RNA for eukaryotic protein genes. These RNA molecules are smaller (contain fewer bases) than they have in the cytoplasm. a True b. False 34. The genetic code defines how sequences of nucleotide triplets, called codons, specify which amino acid will be added next during protein synthesis; most importantly, the same code is used by all known taxa and highly conserved in viruses, bacteria, archaea, eukaryotes, and plants. a. True b. False 35. The large molecular complex that associates with each intron and splices it is called a(n): a. CTD b. transcription factor c. spliceosome d. promoter e. proteasome 36. Which of the phenomena is responsible for the ability of one gene to code for more than one form of a polypeptide? a. point mutations b. translocations c. alternate splicing patterns by the spliceosome d. cross-overs e. hybridization 37. In most cases, which is NOT part of the sliceosome: a. Intron b. snRNA U6 c. 5' splice site, A/C-AGGU-A/G-AGU d. Poly-A site; AAUAAA e. Exonic Splicing Enhancers (ESE) 38. What is always the first amino acid incorporated at the N-terminus of a eukaryotic nascent (new) polypeptide chain? a. cysteine b. formyl-methionine (fMet) c. methionine d. polyA e. ATP 39. Which eukaryotic translation factor is equivalent to prokaryotic EF-TU? a. elF4E b. TFIIH c. eEF-1A d. TATA e. IF2-GTP 40. A nonsense mutation creates a stop codon. What is the result of a nonsense mutation? a. a frameshift b. a completely garbled sequence of amino acids c. a deficiency in one to the cells tRNA d. premature termination of mRNA (transcription) e. premature termination of protein synthesis

33. Consider the RNA for eukaryotic protein genes. These RNA molecules are smaller (contain
fewer bases) than they have in the cytoplasm.
a True
b. False
34. The genetic code defines how sequences of nucleotide triplets, called codons, specify
which amino acid will be added next during protein synthesis; most importantly, the same
code is used by all known taxa and highly conserved in viruses, bacteria, archaea,
eukaryotes, and plants.
a. True
b. False
35. The large molecular complex that associates with each intron and splices it is called a(n):
a. CTD
b. transcription factor
c. spliceosome
d. promoter
e. proteasome
36. Which of the phenomena is responsible for the ability of one gene to code for more than
one form of a polypeptide?
a. point mutations
b. translocations
c. alternate splicing patterns by the spliceosome
d. cross-overs
e. hybridization
37. In most cases, which is NOT part of the sliceosome:
a. Intron
b. snRNA U6
c. 5' splice site, A/C-AGGU-A/G-AGU
d. Poly-A site; AAUAAA
e. Exonic Splicing Enhancers (ESE)
38. What is always the first amino acid incorporated at the N-terminus of a eukaryotic nascent
(new) polypeptide chain?
a. cysteine
b. formyl-methionine (fMet)
c. methionine
d. polyA
e. ATP
39. Which eukaryotic translation factor is equivalent to prokaryotic EF-TU?
a. elF4E
b. TFIIH
c. eEF-1A
d. TATA
e. IF2-GTP
40. A nonsense mutation creates a stop codon. What is the result of a nonsense mutation?
a. a frameshift
b. a completely garbled sequence of amino acids
c. a deficiency in one to the cells tRNA
d. premature termination of mRNA (transcription)
e. premature termination of protein synthesis

Added by James S.

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