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DNA Test

QuestionAnswer
Which of the following variations on translation would be most disadvantageous for a cell? translating polypeptides directly from DNA
Garrod hypothesized that "inborn errors of metabolism" such as alkaptonuria occur because metabolic enzymes require vitamin cofactors, and affected individuals have significant nutritional deficiencies.
The nitrogenous base adenine is found in all members of which group? ATP, RNA, and DNA
A particular triplet of bases in the template strand of DNA is 5' AGT 3'. The corresponding codon for the mRNA transcribed is 3' UCA 5'.
The genetic code is essentially the same for all organisms. From this, one can logically assume which of the following? A gene from an organism can theoretically be expressed by any other organism.
The "universal" genetic code is now known to have exceptions. Evidence for this can be found if which of the following is true? If UGA, usually a stop codon, is found to code for an amino acid such as tryptophan (usually coded for by UGG only).
Which of the following nucleotide triplets best represents a codon? a triplet in the same reading frame as an upstream AUG
Which of the following provides some evidence that RNA probably evolved before DNA? DNA polymerase uses primer, usually made of RNA.
Which of the following statements best describes the termination of transcription in prokaryotes? RNA polymerase transcribes through the terminator sequence, causing the polymerase to separate from the DNA and release the transcript.
Which of the following does not occur in prokaryotic eukaryotic gene expression, but does in eukaryotic gene expression? A poly-A tail is added to the 3' end of an mRNA and a cap is added to the 5' end.
Which of the following is a function of a poly-A signal sequence? It codes for a sequence in eukaryotic transcripts that signals enzymatic cleavage ~1035 nucleotides away.
In eukaryotes there are several different types of RNA polymerase. Which type is involved in transcription of mRNA for a globin protein? RNA polymerase II
Transcription in eukaryotes requires which of the following in addition to RNA polymerase? several transcription factors (TFs)
A part of the promoter, called the TATA box, is said to be highly conserved in evolution. Which of the following might this illustrate? Any mutation in the sequence is selected against.
The TATA sequence is found only several nucleotides away from the start site of transcription. This most probably relates to which of the following? the number of hydrogen bonds between A and T in DNA
Created by: Gjerke1
 

 



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