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Questions and Answers
What is the base pairing rule in DNA?
What is the base pairing rule in DNA?
- Adenine is always opposite guanine, and cytosine is always opposite thymine
- Adenine is always opposite thymine, and cytosine is always opposite guanine (correct)
- Adenine is always opposite uracil, and cytosine is always opposite adenine
- Adenine is always opposite cytosine, and guanine is always opposite thymine
How many hydrogen bonds are there between adenine and thymine?
How many hydrogen bonds are there between adenine and thymine?
- Two (correct)
- One
- Three
- Four
Which form of DNA has a left-handed helix?
Which form of DNA has a left-handed helix?
- C DNA
- Z DNA (correct)
- B DNA
- A DNA
What is the diameter of the B DNA helix?
What is the diameter of the B DNA helix?
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Study Notes
DNA Structure
- The base pairing rule in DNA states that adenine (A) pairs with thymine (T) and guanine (G) pairs with cytosine (C).
Hydrogen Bonds
- Adenine and thymine are connected by 2 hydrogen bonds.
DNA Forms
- The Z-form of DNA has a left-handed helix.
DNA Helix Dimensions
- The diameter of the B DNA helix is approximately 2 nanometers (nm).
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