As a result of the rotation about its six bonds, DNA can exist in a variety of forms. Determine whether the image and descriptions correspond to A-DNA, B-DNA, Z-DNA, or all three forms of DNA. A-DNA the favored form of dehydrated DNA widest helix diameter has a 23.7 Å helix diameter B-DNA most stable under physiological conditions The base pairs are nearly perpendicular compared to the plane of the helix axis and exhibit a right-handed helix. Z-DNA left-handed narrowest helix diameter HOCH₂ OH All DNA forms G pairs with C, and A pairs with T. antiparallel strands
As a result of the rotation about its six bonds, DNA can exist in a variety of forms. Determine whether the image and descriptions correspond to A-DNA, B-DNA, Z-DNA, or all three forms of DNA. A-DNA the favored form of dehydrated DNA widest helix diameter has a 23.7 Å helix diameter B-DNA most stable under physiological conditions The base pairs are nearly perpendicular compared to the plane of the helix axis and exhibit a right-handed helix. Z-DNA left-handed narrowest helix diameter HOCH₂ OH All DNA forms G pairs with C, and A pairs with T. antiparallel strands
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:**DNA Forms and Their Characteristics**
DNA can exist in various forms due to the rotation about its six bonds. This information elucidates the characteristics associated with A-DNA, B-DNA, Z-DNA, or all forms of DNA.
**A-DNA**
- Favored form of dehydrated DNA
- Widest helix diameter
- Has a 23.7 Å helix diameter
**B-DNA**
- Most stable under physiological conditions
- The base pairs are nearly perpendicular to the plane of the helix axis and exhibit a right-handed helix
**Z-DNA**
- Left-handed
- Narrowest helix diameter
- Diagram: Chemical structure showing an "A" representing adenine, with functional groups CH2OH, OH, and O.
**All DNA Forms**
- G pairs with C, and A pairs with T.
- Antiparallel strands
These forms ensure the structural integrity and functional versatility of DNA, vital for genetic information storage and transmission.
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