DNA & Chromosomes (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What shape is the DNA molecule in prokaryotic cells?
What shape is the DNA molecule in prokaryotic cells?
Circular
Are histone proteins associated with DNA in prokaryotic cells?
Are histone proteins associated with DNA in prokaryotic cells?
No, DNA is free from histones
What type of proteins do eukaryotic DNA molecules associate with to form chromosomes?
What type of proteins do eukaryotic DNA molecules associate with to form chromosomes?
Histones
How is DNA in mitochondria and chloroplasts organised?
How is DNA in mitochondria and chloroplasts organised?
Short, circular, no histones
What are the two identical threads of a chromosome called?
What are the two identical threads of a chromosome called?
Chromatids
Approximately how much DNA is found in each human cell?
Approximately how much DNA is found in each human cell?
2 metres
How many chromosomes do humans have?
How many chromosomes do humans have?
46
What are homologous chromosomes?
What are homologous chromosomes?
Paired chromosomes from each parent
What is the diploid number in humans?
What is the diploid number in humans?
46
What is an allele?
What is an allele?
An alternative form of a gene