Exam 2 Biology pt.3

Question 1

RNA Processing

Answer 1

1) A Poly(A) tail is added to the 3’end of the mRNA
2) A 5’ Cap is added this cap is a modified nucleotide
3) Introns removed and Exons Stay

Question 2

Introns

Answer 2

sections of mRNA that aren’t necessary to make the protein (removed)

Question 3

Exons

Answer 3

is the part of the mRNA that stays and is translated into a protein

Question 4

Tropomysoin

Answer 4

Protein involved in muscle contraction

Question 5

5’ cap Roles

Answer 5

The ribosome recognizes the cap
* Protects from degradation
* Not encoded in DNA

Question 6

3’ poly-A tail Roles

Answer 6

Improves stability of mRNA
* Eventual loss of tail targets the mRNA for rapid degradation

Question 7

Translation

Answer 7

• mRNA read 5’→ 3’ by ribosome
• From the Start codon to the Stop codon
  The ribosome is the site of translation

Question 8

A Site

Answer 8

Where incoming charged tRNA binds ribosome

Question 9

P site

Answer 9

Where tRNA with growing AA chain is positioned

Question 10

E site

Answer 10

Where tRNA leaves theribosome

Question 11

Transfer RNA (tRNA) carry specific…?

Answer 11

amino acids to ribosome

Question 12

Complementary Strands

Answer 12

mRNA and tRNA

Question 13

Which is the anti-codon and which is the codon (mRNA or tRNA)

Answer 13

mRNA-Codon
tRNA- Anti-codn

Question 14

Path of mRNA, tRNA, Amino Acids

Answer 14

mRNA goes to tRNA, and that goes to Amino acids.

Question 15

We would write this tRNA as…

Answer 15

CAU
* 5’ CAU 3’
* 3’ UAC 5
mRNA: AUG
tRNA: 3’ UAC 5’ - CAU