DNA

17.2

What the syllabus asks of you

Describe the structure of a DNA molecule: (a) two strands coiled together to form a double helix (b) each strand is made up of a chain of nucleotides (c) each nucleotide contains a base (A, T, C, G; full names are not required) (d) bonds between pairs of bases hold the strands together (e) the bases always pair up in the same way: A with T, and C with G
Define a gene as a length of DNA that codes for a protein
Explain that DNA controls cell function by controlling the production of proteins, including enzymes
State that the sequence of bases in a gene determines the sequence of amino acids needed to make a specific protein (knowledge of the details of nucleotide structure is not required)
Understand that different sequences of amino acids give different shapes to protein molecules

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Chapter 17: DNA

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Every question on DNA, untimed, marked as you go.

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