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Which of the following is transcribed and then translated to form a protein product? |
A gene for a transcription factor |
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There are how many types of bacterial RNA polymerase? |
one |
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Transfer RNA _______. |
binds to its specific amino acid in the active site of an aminoacyl-tRNA synthetase |
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Which of the following is a stop codon? |
UGA |
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Which of the following is not a post-transitional modification that might be required of a protein before it becomes functional in a cell? |
All of listed responses are post-transitional modifications required of some proteins. |
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Which of the following is not transcribed from DNA? |
Promoter |
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How is the template strand for a particular gene determined? |
It is established by the presence of the promoter. |
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Which of the following individuals was the first to suggest that genes dictate phenotypes through enzymes? |
Archibald Garrod |
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Which of the following would not be found in a bacterial cell? |
Small RNAs in splicecosome |
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Which of the following is not part of the translation initiation complex? |
TATA box |
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Which binding site on a ribosome holds a tRNA attached to a growing polypeptide chain? |
P site |
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RNA polymerase _______. |
moves along the template strand of DNA, elongating an RNA molecule in a 5′ –> 3′ direction |
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A single peptide _______. |
is the first 20 or so amino acids of a protein destined for a membrane location or for secretion from the cell. |
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Which of the following is true of transcription factors? |
All listed responses are correct |
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Which of the following is not involved in the formation of a eukaryotic transcription initiation complex? |
Small RNA molecules |
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Transcription involves the transfer of information from _____. |
DNA to RNA |
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The type of mutation responsible for sickle-cell anemia is _____. |
both a point in mutation and a nucleotide-pair substitution |
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A stretch of bacterial DNA 600 nucleotides long can code at most for a polypeptide of how many amino acids? |
200 |
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Which of the following is true of RNA processing? |
Assemblies of protein and small RNAs, called spliceosomes, may catalyze splicing. |
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Which enzyme synthesizes tRNA? |
RNA polymerase |
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The energy required for assembly of a polypeptide by a ribosome comes directly from ______. |
GTP |
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A nucleotide deletion early in the coding sequence of a gene would most likely result in _____. |
All of the listed choices are correct |
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If the 5′ –> 3′ nucleotide sequence on the nontemplate DNA strand is CAT, what is the corresponding codon on mRNA? |
CAU |
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A series of studies on mutants of Neurospora identified 3 classes of mutants that needed arginine added to minimal media in order to grow. The production of arginine includes the following steps precursor -> ornithine -> citrulline -> arginine. What nutrient(s) have to be supplied to the mutant(s) have to be supplied to the mutants that had a defective enzyme for the ornithine -> citrulline step in order to grow? |
Citrulline |
|
A ribozyme is _____. |
an RNA molecule that functions as an enzyme |
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