AS AQA BiologyUNIT 2

Chapter 8 Revision QuizDNA and Meiosis

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1. What are the three components of a nucleotide? (3)

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2. What are the two double-ring bases? (2)

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3. Which one of these pairs with cytosine? (1)

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4. How many hydrogen bonds form between them? (1)

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5. What shape does the DNA form? (1)

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6. What is a gene? (2)

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7. How many bases code for an amino acid? (1)

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8. How many different amino acids regularly occur in proteins? (1)

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9. What is a ‘stop code’? (1)

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10. What do you call chromosomes that pair up? (1)

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11. What is an allele? (1)

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12. What is the main difference between mitosis and meiosis? (1)

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13. What do you call a cell with a full set of chromosomes? (1)

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14. How many divisions are there in meiosis? (1)

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15. What is it called when chromatids exchange equivalent parts? (1)

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16. What is it called when one of the homologous pairs is chosen to go into the daughter cells at the 1st division of meiosis? (1)

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