Must

Question 1

Genetic code

Answer 1

DNA coding for a sequence of amino acids

Question 2

What’s a codon and triplet code

Answer 2

A triplet code is a sequence of three bases called a codon each codon codes for an amino acid

Question 3

Why does sequence start with a “met”

Answer 3

To ensure DNA base sequence is read from 1 so it prevents overlapping

Question 4

Why is code degenerate?

Answer 4

Many amino acids can be coded from more than one codon

Question 5

Transcription

Answer 5

DNA is too large so it’s copied and produces shorter molecule RNA
1-DNA replication-unwinds unzips
2-the sense strand contain dna that code for protein to be synthesised 5’ to 3’.the antisense strand acts as the template strand so that we end with sense strand.free nucle will pair
3-phosphodieste formed from RNA polymerase
Completed short strand of rna is called messenger RNA
mRNA detaches form dna template and leaves nucleus and travels to ribosome

Question 6

Translation

Answer 6

r RNA maintains structural stability of protein synthesis sequence
1-mRNA binds to soecifics site on ribosome,the ribosome holds it while it’s decoded,translation into a sequence of amino acids
2-transfer RNA is composed of strand of RNA folded that anticodon is at end which will pair with complementary codon in rna

Question 7

Uses of Stem cells