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fill in the blank above with a choice below
a) it lacks exons
b) it lacks introns
c) it's really RNA
d) None of the above

2007-03-23 17:21:08 · 2 answers · asked by passion2share 4 in Science & Mathematics Biology

2 answers

b) it lacks introns, or intervening non coding sequences.

For the purposes of cloning a gene into an expression vector, it's necessary to get rid of those intervening sequences. This is done by using an enzyme originally discovered from RNA viruses that can make a DNA copy of RNA. This is called "copy" or cDNA.

2007-03-23 17:37:00 · answer #1 · answered by BP 7 · 0 0

D
CDNA is used in gene cloning or as gene probes or in the creation of a CDNA library. The partial sequences of CDNA can be obtained as expressed sequence tags.

2007-03-23 17:26:27 · answer #2 · answered by US456 2 · 0 1

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