,All AS Biology 3/4/5/6 Marker
,Describe how mRNA
is produced in the
nucleus of a cell (6)
1. DNA helicase breaks hydrogen
bonds.
2. Only one DNA strand acts as a
template strand.
3. RNA nucleotides attracted to
exposed bases.
4. Through complimentary base
pairing rule.
5. RNA polymerase joins RNA
nucleotides together.
6. Pre-mRNA spliced to remove
introns (non coding genes).
, Describe the structure
of proteins (5)
1. Polymer of amino acids/Joined by peptide
bonds/Formed by condensation reactions.
2. Primary structure is order of amino acids.
3. Secondary structure is folding of polypeptide
chain into alpha helixes or beta pleated
sheets.
4. Tertiary structure is 3-D folding due to
hydrogen bonding, ionic bonding and
disulfide bridges.
5. Quaternary structure is two or more
polypeptide chains.
,Describe how mRNA
is produced in the
nucleus of a cell (6)
1. DNA helicase breaks hydrogen
bonds.
2. Only one DNA strand acts as a
template strand.
3. RNA nucleotides attracted to
exposed bases.
4. Through complimentary base
pairing rule.
5. RNA polymerase joins RNA
nucleotides together.
6. Pre-mRNA spliced to remove
introns (non coding genes).
, Describe the structure
of proteins (5)
1. Polymer of amino acids/Joined by peptide
bonds/Formed by condensation reactions.
2. Primary structure is order of amino acids.
3. Secondary structure is folding of polypeptide
chain into alpha helixes or beta pleated
sheets.
4. Tertiary structure is 3-D folding due to
hydrogen bonding, ionic bonding and
disulfide bridges.
5. Quaternary structure is two or more
polypeptide chains.
