Cell Bio Exam 3 Dimario, chapter 7 Test with
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Terms in this set (153)
This is a region is a gene Promoter
that is a transcriptional
control region...
• the entire DNA sequence necessary for the
production
of a functional protein or RNA.
- mRNAs that encode proteins
- ribosomal, transfer, and other functional
RNAs as well (i.e., non-coding RNAs)
What is a gene? • includes transcriptional control regions (promoters)
• includes introns and exons.
• includes enhancer sequences that could lie some
distance
away from the promoter, either upstream or
downstream.
In Eukaryotes: pre-mRNAs
Mono-cistronic mRNAs w/introns
(eukaryotic mRNAs)
Poly-cistronic mRNAs The operon but no introns in prokaryotes
(prokaryotic mRNAs)
, noncoding DNA sequences,
• Extremely rare in prokaryotes.
Introns are
• Yeast have introns, but not as prevalent as in higher
eukaryotes.
• Higher animals and plants have plenty of introns.
What is one way of Alternative Splicing
yielding different protein
products from a single
pre-mRNA?
- Different internal splicing
What are three different - Different 3' ends
mechanisms of alternative - Different 5' ends
splicing? (These could be produced by two different
promoters, perhaps early versus late in development)
True or False? The human TRUE
genome contains a lot of
intergenic DNA.
True or False? The yeast FALSE, the yeast genome contains very little
gene contains a lot of intergenic DNA and relatively few introns.
intergenic DNA and
introns.
these are genes that arise by reverse transcription of
What are pseudogenes? the mature mRNA (e.g. upon retroviral infection)
- no promoter, no introns (they are silent)
Why is there so much non- Repetitive DNA sequences
functional/non-coding
DNA? (explains the
paradox)
Whats the C-value why do the C values do not correlate with
paradox? phylogeny?
Answers
Save
Terms in this set (153)
This is a region is a gene Promoter
that is a transcriptional
control region...
• the entire DNA sequence necessary for the
production
of a functional protein or RNA.
- mRNAs that encode proteins
- ribosomal, transfer, and other functional
RNAs as well (i.e., non-coding RNAs)
What is a gene? • includes transcriptional control regions (promoters)
• includes introns and exons.
• includes enhancer sequences that could lie some
distance
away from the promoter, either upstream or
downstream.
In Eukaryotes: pre-mRNAs
Mono-cistronic mRNAs w/introns
(eukaryotic mRNAs)
Poly-cistronic mRNAs The operon but no introns in prokaryotes
(prokaryotic mRNAs)
, noncoding DNA sequences,
• Extremely rare in prokaryotes.
Introns are
• Yeast have introns, but not as prevalent as in higher
eukaryotes.
• Higher animals and plants have plenty of introns.
What is one way of Alternative Splicing
yielding different protein
products from a single
pre-mRNA?
- Different internal splicing
What are three different - Different 3' ends
mechanisms of alternative - Different 5' ends
splicing? (These could be produced by two different
promoters, perhaps early versus late in development)
True or False? The human TRUE
genome contains a lot of
intergenic DNA.
True or False? The yeast FALSE, the yeast genome contains very little
gene contains a lot of intergenic DNA and relatively few introns.
intergenic DNA and
introns.
these are genes that arise by reverse transcription of
What are pseudogenes? the mature mRNA (e.g. upon retroviral infection)
- no promoter, no introns (they are silent)
Why is there so much non- Repetitive DNA sequences
functional/non-coding
DNA? (explains the
paradox)
Whats the C-value why do the C values do not correlate with
paradox? phylogeny?
