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  • AQA
  • A Level Biology
  • Unit 4 - Genetic information, variation and relationships between organisms
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Summary DNA, Genes and Chromosomes - A Level Biology

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2022/2023 Written for academic year
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Unit 4 - Genetic information, variation and relationships between organisms
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Detailed notes on DNA, Genes and Chromosomes Based on the A Level specification Active Recall format AQA Exam Board

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DNA, genes and chromosomes

DNA
What is the structure of DNA in prokaryotic cells?

Short

Circular

Not associated with proteins

What is the structure of DNA in eukaryotic cells?

Very long

Linear

Associated with proteins called histones

What do DNA and its associated proteins form?
A chromosome

What are the stages of condensing DNA into chromosomes?

1. Wrapping of DNA around histones

2. Coiling

3. Supercoiling

Other than the nucleus, which other organelles contain DNA?

Mitochondria

Chloroplasts

What is the structure of DNA in the mitochondria and chloroplasts?

Short

Circular




DNA, genes and chromosomes 1

Document information

Study Level
A/AS Level
Subject
A Level Biology
Uploaded on
November 28, 2022
Number of pages
3
Written in
2022/2023
Type
Summary
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  • aqa
  • a level
  • biology
  • dna
  • genes
  • chromosomes
  • active recall
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