Stability & Function of DNA (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 term describes the two DNA strands running in opposite directions?
What term describes the two DNA strands running in opposite directions?
Antiparallel
Which base does adenine pair with in DNA?
Which base does adenine pair with in DNA?
Thymine
How many hydrogen bonds form between cytosine and guanine?
How many hydrogen bonds form between cytosine and guanine?
Three
Which is NOT a source of DNA stability?
Which is NOT a source of DNA stability?
Ionic bonds between bases
Why are C-G base pairs more stable than A-T pairs?
Why are C-G base pairs more stable than A-T pairs?
C-G pairs have three hydrogen bonds
Where is the phosphodiester backbone located?
Where is the phosphodiester backbone located?
Outside of the double helix
What are base stacking forces?
What are base stacking forces?
Weak forces between adjacent base pairs
Approximately how many base pairs are in a typical mammalian cell?
Approximately how many base pairs are in a typical mammalian cell?
3.2 billion
What provides the foundation for genetic variation in DNA?
What provides the foundation for genetic variation in DNA?
Diverse base pair sequences
Why is it advantageous that DNA strands are joined by weak hydrogen bonds?
Why is it advantageous that DNA strands are joined by weak hydrogen bonds?
Allows separation during replication