Transcription

Question 1

what is transcription?

Answer 1

to make a mRNA strand from DNA

Question 2

product of transcription

Answer 2

mRNA

Question 3

3 types of RNA

Answer 3

Messenger RNA (mRNA)
Transfer RNA (TRNA)
Ribosomal RNA (rRNA)

Question 4

mRNA transcript

Answer 4

piece of mRNA that will float out of the nucleus into the cytoplasm

Question 5

template

Answer 5

DNA strand that serves as a guide for producing mRNA; determines the sequence of the mRNA.

Question 6

exons

Answer 6

short sequences of the mRNA nucleotides used to make proteins

Question 7

introns

Answer 7

Long sequences of the mRNA nucleotides that don’t code for anything (they interrupt coding).

Question 8

spliceosome

Answer 8

removes introns before mRNA leaves and joins together exons

Question 9

Poly A tail

Answer 9

to protect the mRNA strand from breaking down, as it also helps with translation initiation.

Question 10

A codon

Answer 10

is a set of 3 nucleotides on the mRNA strand.

Question 11

Anti-Codon

Answer 11

is a set of 3 nucleotides on the tRNA strand.

Question 12

Initiation phase:

Answer 12

-RNA P binds to open the double helix
-recognizes promoter sequence and attaches to it before actual gene

Question 13

Elongation phase

Answer 13

RNA P binds to mRNA strand using dna as template
-mRNA is complimentary to sense strand

Question 14

Termination phase

Answer 14

-mRNA transcript floats out of nucleus & into cytoplasm
-RNA P detaches, helix reforms
-Ribosomes will read transcript and turn it into a protein

Question 15

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Answer 15

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