The nucleus of a cell contains DNA - AQA - GCSE Biology - Question 1 - 2021 - Paper 1
Question 1
The nucleus of a cell contains DNA.
1. Name the structures inside the cell nucleus that contain DNA.
2. Name the part of the DNA molecule labelled X.
3. What type... show full transcript
Worked Solution & Example Answer:The nucleus of a cell contains DNA - AQA - GCSE Biology - Question 1 - 2021 - Paper 1
Step 1
Name the structures inside the cell nucleus that contain DNA.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The structures inside the cell nucleus that contain DNA are called chromosomes.
Step 2
Name the part of the DNA molecule labelled X.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The part of the DNA molecule labelled X is the sugar, specifically deoxyribose.
Step 3
What type of substances are labelled A, C, G and T in Figure 1?
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The substances labelled A, C, G and T are nitrogenous bases, specifically adenine, cytosine, guanine, and thymine.
Step 4
Label each of these substances with the correct letter, A, C, G or T.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The four substances that need to be labelled can be identified using their position and features in Figure 2, corresponding to either A, C, G or T as per their base pairing.
Step 5
What type of substance does a gene code for?
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A gene codes for a protein.
Step 6
What mass of DNA will a human sperm cell contain?
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The mass of DNA that a human sperm cell will contain is 3 × 10^-12 grams.
Step 7
What is the name of the type of cell division that produces sperm cells?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The type of cell division that produces sperm cells is called meiosis.
