The nucleus of a cell contains DNA - AQA - GCSE Biology - Question 8 - 2021 - Paper 1
Question 8
The nucleus of a cell contains DNA.
1. Name the structures inside the cell nucleus that contain DNA.
2. Figure 13 shows part of a DNA molecule labelled X.
3. Name... show full transcript
Worked Solution & Example Answer:The nucleus of a cell contains DNA - AQA - GCSE Biology - Question 8 - 2021 - Paper 1
Step 1
Name the structures inside the cell nucleus that contain DNA.
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Answer
The structures inside the cell nucleus that contain DNA are called chromosomes.
Step 2
Name the part of the DNA molecule labelled X.
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Answer
The part of the DNA molecule labelled X is the sugar.
Step 3
What type of substances are labelled A, C, G and T in Figure 13?
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Answer
The substances labelled A, C, G, and T in Figure 13 are bases, specifically the nitrogenous bases adenine (A), cytosine (C), guanine (G), and thymine (T).
Step 4
Label each of these substances with the correct letter, A, C, G or T.
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Answer
The substances not labelled in part Y of Figure 14 can be identified as follows:
Substance 1: A
Substance 2: C
Substance 3: G
Substance 4: T
Step 5
What is happening to the DNA in part Z of Figure 14?
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Answer
The DNA in part Z of Figure 14 is undergoing replication.
Step 6
What type of substance does a gene code for?
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Answer
A gene codes for a protein.
Step 7
What mass of DNA will a human sperm cell contain?
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Answer
A human sperm cell will contain 3 × 10^-12 grams of DNA.
Step 8
What is the name of the type of cell division that produces sperm cells?
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Answer
The type of cell division that produces sperm cells is called meiosis.
