Aqa A Level Biology Unit 1 Study Guide Rated A+

How does DNA polymerase move and add nucleotides? {Ans: It moves from a 3' to a 5' end as the active site is only complementary to the 3' end of the DNA strand. This means nucleotides are added in a 5' to 3' direction.}Which of proteins, polysaccharides and lipids are not a polymer. {Ans: Lipids.}What is the difference between the 3' and 5' end of DNA? {Ans: 3' has a hydroxyl (OH) group on the pentose sugar and 5' end is a phosphate group.}What is a tertiary structure? {Ans: Chain coils further, forming hydrogen bonds, ionic bonds and disulphide bridges.}What are proteins made of? {Ans: Amino acids.}Alpha glucose {Ans: }