RNA

Question 1

Structure?

Answer 1

• contains only ONE strand of nucleotides.

- sugar (ribose) + phosphate + bases – uracil instead of thymine

Question 2

Types of RNA?

Answer 2

Messenger RNA (5%) -carry genetic information from DNA in ncl to ribosomes
in cytoplasm.
2. Transfer RNA (15%) -carry an amino acid to ribosome + binds its anticodon to
codon in mRNA. Thus synthesising the amino acid sequence.
3. Ribosomal RNA (80%) -in ribosomes, helps in linking of amino acids into
proteins by catalysing peptide bonds.

Question 3

Different RNA structure types?

Answer 3

Primary: sequence of bases
Secondary: intramolecular base pairs between complementary base pairs
cause hairpins, bulges + int. loops (caused by H bonds)
Tertiary: three-dimensional arrangement of RNA- A-minor motifs, 3-way junctions, pseudoknots, etc.
Quaternary structure: supermolecular organization

Question 4

How is RNA made?

Answer 4

transcription of DNA