Describe the difference between an autocrine and paracrine action, and the difference between a hormone and a neurotransmitter.
Which method is used to remove DNA from a cell?
The following statements about the double-helical structure of DNA are correct EXCEPT
- It has adenine paired with thymine and cytosine paired with guanine
- It can assume many different forms including A-DNA, B-DNA, and Z-DNA
- In B-DNA, all the hydrogen-bonded base pairs lie in a plane perpendicular to the helix axis
- None of the above are correct
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