2024 aqa as biology 7401/2
paper 2 with 350 questions and
correct detailed answers
(verified answers) |already
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What are the three ways a pathogen can damage hosts cells?-
ANSWER-1) rupturing them to release nutrients inside them
2) breaking down nutrients inside the cell for their own use. This
starves and eventually kills the cell.
3) replicating inside the cells and bursting them when they're
released
Explain the primary, secondary, tertiary and quaternary structure
of a protein.
-ANSWER-Primary structure = A sequence of amino acids in
the polypeptide chain
Secondary structure = Hydrogen bonds form between the amino
acids. This makes it coil or fold.
Tertiary structure = The coiled or folded chain is coiled or
folded furthur. More bonds form between different parts of the
polypeptide chain. For proteins made from a single polypeptide
chain, It forms their final 3D structure
Quaternary structure = the way the polypeptide chains are
assembled together. Several different polypeptide chains held
together by bonds. For proteins made from more than one
polypeptide chain this is their final 3D structure
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