Lecture 7 - February 1, 2010

Lecture 7 - February 1, 2010 - What is RNA? RNA:...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
What is RNA? RNA: ribonucleic acid Single stranded Sugar is ribose Contains uracil (U) instead of thymine (T)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Transcription Template strand : Copied into mRNA RNA Polymerase : makes RNA (processive catalysis) Transcription occurs in three phases: Initiation Elongation Termination
Background image of page 2
Transcription: Initiation Promoter : special sequence on template DNA Allows RNA polymerase to bind to DNA Tells RNA Pol which direction to transcribe in Tells RNA Pol where to start transcription (Initiation site)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Transcription: Elongation Template read in 3′ to 5′ direction DNA unwound 10 bp at a time Transcript is antiparallel to template RNA polymerases do not proofread
Background image of page 4
Transcription: Termination Specified by DNA base sequence May require helper proteins Eukaryotes make pre-mRNA that is edited (spliced)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Transcription: mRNA Processing
Background image of page 6
Animation 12.1 Transcription
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Clicker Question Which of the following would be the correct product of transcription from the following DNA? Promoter 5′---- TTGTGGCAC 3′ ------------------- 3′---- AACACCGTG 5′ ------------------- a. 3′ TTGTGGCAC 5′ b. 3′ UUGUGGCAC 5′ c. 5′ UUGUGGCAC 3′ d. 5′ GUGCCACAA 3′ e. 3′ GUGCCACAA 5′
Background image of page 8
How is information coded in DNA?
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 38

Lecture 7 - February 1, 2010 - What is RNA? RNA:...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online