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6 notecards = 2 pages (4 cards per page)

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Biology Test 4

front 1

When does translation begin in prokaryotic cells?
A) after a transcription initiation complex has been formed
B) as soon as transcription has begun
C) after the 5สน caps are converted to mRNA
D) once the pre-mRNA has been converted to mRNA
E) as soon as the DNA introns are removed from the template

back 1

B

front 2

What are the coding segments of a stretch of eukaryotic DNA called?
A) introns
B) exons
C) codons
D) replicons
E) transposons

back 2

B

front 3

Which of the following statements are true about protein synthesis in prokaryotes?
A) Extensive RNA processing is required before prokaryotic transcripts can be translated.
B) Translation can begin while transcription is still in progress.
C) Prokaryotic cells have complicated mechanisms for targeting proteins to the appropriate cellular
organelles.
D) Translation requires antibiotic activity.
E) Unlike eukaryotes, prokaryotes require no initiation or elongation factors.

back 3

B

front 4

function of restriction enzyme

back 4

to cleave nucleic acids at specif sites

front 5

Using RNA as a template for protein synthesis instead of translating proteins directly from the DNA is
advantageous for the cell because
A) RNA is much more stable than DNA.
B) RNA acts as an expendable copy of the genetic material.
C) only one mRNA molecule can be transcribed from a single gene, lowering the potential rate of gene
expression.
D) tRNA, rRNA and others are not transcribed.
E) mRNA molecules are subject to mutation but DNA is not.

back 5

B

front 6

Gene Therapy

back 6

had apparent success in treating bone marrow