Session 8: Gene Expression Flashcards Preview

Year 1: Medical Cell Biology and Genetics > Session 8: Gene Expression > Flashcards

Flashcards in Session 8: Gene Expression Deck (14)
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1
Q

Name 3 processes which are required to convert pre-mRNA to mature mRNA.

A
  1. 5’ Capping
  2. Poly A tail (polyadenylation)
  3. Splicing
2
Q

Why is RNA processing required?

A

To prevent mRNA degradation.

3
Q

What link is formed within 5’ capping?

A

5’ to 5’

4
Q

What are ribosomes comprised of?

A

rRNA and proteins

5
Q

Name the three types of RNA

A
  1. rRNA
  2. mRNA
  3. tRNA
6
Q

rRNA: How many kinds? How many copies?

A
  • few kinds

- many copies

7
Q

mRNA: How many kinds? How many copies?

A
  • 100,000s kinds (due to splicing)

- few copies

8
Q

tRNA: How many kinds? How many copies?

A
  • 100s kinds

- many copies

9
Q

Name 4 features of the genetic code.

A
  1. Triplet code
  2. Degenerate
  3. Non-overlapping
  4. Comma-less
10
Q

What is the aa initiation sequence?

A

AUG

11
Q

What are the 3 aa termination sequences?

A

UAA
UAG
UGA

12
Q

How are stem loops formed in a tRNA clover structure?

A

Hydrogen bonds form between anti-parallel complementary sequences.

13
Q

What is the anticodon triplet code?

A

5’ CAU 3’

14
Q

What is wobble base pairing?

A

A wobble base pair is a pairing between two nucleotides in RNA molecules that does not follow Watson-Crick base pair rules.