4.4 study guide

Question 1

what is a codon?

Answer 1

3 bases of RNA that will translate to 1 amino acid

Question 2

What do we mean when we say the codon is redundant?

Answer 2

several codons for each amino acid.
3rd base “wobble”

Question 3

Why can’t DNA leave the nucleus?

Answer 3

It can’t leave chloroplast and mitochondria.

Question 4

What bond holds the two strands of DNA together

Answer 4

Hydrogen bonds

Question 5

What will happen when RNA polymerase Acts on DNA

Answer 5

it copies the DNA

Question 6

What is the start codon

Answer 6

AUG

Question 7

Role of mRNA

Answer 7

contains message/code for amino acid sequence

Question 8

Role of tRNA

Answer 8

transfers amino acids, contains anti codons that pair with mRNA codons to put aa in the correct order

Question 9

Role of rRNA

Answer 9

facilitates matching of mRNA & rRNA joins amino acids to synthesize protein.

Question 10

role of animoacyl tRNA synthase

Answer 10

enzyme that synthesizes/puts amino acids in tRNA

Question 11

What is inside the ribosome

Answer 11

A site, P site, E site

Question 12

A site

Answer 12

tRNA site
-matches correct tRNA to the next codon in the mRNA.

Question 13

P site

Answer 13

-holds tRNA carrying growing polypeptide chain

Question 14

E site

Answer 14

exist site
-empty tRNA ribosome from exit site.