Unit 1 Biology January 2015 IAL

1. The sugar in a mononucleotide of RNA is





2. In a DNA double helix, the two strands are held together by





3. The base present in RNA but not present in DNA is





4. The mononucleotides in a molecule of mRNA are joined together by





5. The complementary base that pairs with guanine is





6. Choose the answer that completes the following statement. Each fatty acid chain is joined to glycerol by





7. Choose the answer that completes the following statement. The blood vessel labelled Q in the diagram is the