This question is about DNA - AQA - GCSE Biology - Question 7 - 2020 - Paper 1
Question 7
This question is about DNA.
Describe the shape of a DNA molecule.
Figure 10 shows part of a DNA molecule.
DNA codes for a sequence of amino acids.
Which part of D... show full transcript
Worked Solution & Example Answer:This question is about DNA - AQA - GCSE Biology - Question 7 - 2020 - Paper 1
Step 1
Describe the shape of a DNA molecule.
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Answer
The shape of a DNA molecule is described as a double helix. This structure consists of two strands that wind around each other, resembling a twisted ladder. Each strand is composed of a sugar-phosphate backbone with nitrogenous bases paired in the interior.
Step 2
Which part of DNA forms the code for a particular amino acid?
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Answer
Bases
Step 3
Calculate the length of the DNA in millions of nanometres.
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Answer
To calculate the length of the DNA, multiply the number of repeating units by the length of each unit:
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Answer
One advantage of having DNA analysis is that it can help determine if a cancer is genetic, which allows for early detection and more personalized treatment options.
