lecture 6

Question 1

secondary structure

Answer 1

the initial pattern of folding of a polypeptide or a polynucleotide, usually dictated by opportunities for hydrogen bonding

Question 2

RNA polymerase

Answer 2

an enzyme that synthesizes RNA in the 5’ -> 3’ direction using a complementary and antiparallel DNA strand as a template

Question 3

promoter

Answer 3

a site on DNA to which RNA polymerase binds to commence transcription

Question 4

operon

Answer 4

two or more genes transcribed into a single RNA and under the control of a single regulatory site

Question 5

termination

Answer 5

stopping the elongation of an RNA molecule at a specific site

Question 6

exon

Answer 6

the coding DNA sequences in a split gene (contrast with introns)

Question 7

intron

Answer 7

the intervening noncoding DNA sequences in a split gene (contrast with exons)

Question 8

RNA processing

Answer 8

the conversion of a primary transcript RNA to its mature form

Question 9

primary transcript

Answer 9

an unprocessed RNA molecule that is the direct product of transcription

Question 10

spliceosome

Answer 10

a complex of ribonucleoproteins that catalyze the removal of introns from primary RNA transcripts