06-11-2011, 04:09 PM
1.Promoters for eukaryotic mRNA synthesis:
A. are more complex than prokaryotic promoters
B. can require binding of multiple transcription factors to form a transcription complex
C. have specific DNA sequences such as the "TATA" box that are recognized by proteins
D. are the stretches of DNA to which RNA polymerase binds to initiate transcription
E. all of these
2. mRNA will form hybrids only with the coding strand of DNA because:
A. DNA will not reanneal at high temperatures
B. the salt concentration will affect DNA reannealing
C. DNA will not reanneal at low temperatures
D. RNA
NA hybridization follows the base-pairing rules
E. denatured DNA will not reanneal after it is diluted
3.A messenger acid is 336 nucleotides long, including the initiator and termination codons. The
number of amino acids in the protein translated from this mRNA is:
A999
B630
C330
D111
E110
4.A synthetic mRNA of repeating sequence 5'-CACACACACACACACAC... is used for a cell-
free protein synthesizing system. If we assume that protein
synthesis can begin without the need for an initiator codon, what product or products would
you expect to occur after protein synthesis?
A. one protein, consisting of a single amino acid
B. three proteins, each consisting of a different, single amino acid
C. two proteins, each with an alternating sequence of two different amino acids
D. one protein, with an alternating sequence of three different amino acids
E. one protein, with an alternating sequence of two different amino acids
A. are more complex than prokaryotic promoters
B. can require binding of multiple transcription factors to form a transcription complex
C. have specific DNA sequences such as the "TATA" box that are recognized by proteins
D. are the stretches of DNA to which RNA polymerase binds to initiate transcription
E. all of these
2. mRNA will form hybrids only with the coding strand of DNA because:
A. DNA will not reanneal at high temperatures
B. the salt concentration will affect DNA reannealing
C. DNA will not reanneal at low temperatures
D. RNA
NA hybridization follows the base-pairing rulesE. denatured DNA will not reanneal after it is diluted
3.A messenger acid is 336 nucleotides long, including the initiator and termination codons. The
number of amino acids in the protein translated from this mRNA is:
A999
B630
C330
D111
E110
4.A synthetic mRNA of repeating sequence 5'-CACACACACACACACAC... is used for a cell-
free protein synthesizing system. If we assume that protein
synthesis can begin without the need for an initiator codon, what product or products would
you expect to occur after protein synthesis?
A. one protein, consisting of a single amino acid
B. three proteins, each consisting of a different, single amino acid
C. two proteins, each with an alternating sequence of two different amino acids
D. one protein, with an alternating sequence of three different amino acids
E. one protein, with an alternating sequence of two different amino acids
