7. Given what is known about DNA structure, which of the following general shapes might be found? (Horizontal lines represent bonding between complementary bases.) Explain!!!
7. Given what is known about DNA structure, which of the following general shapes might be found? (Horizontal lines represent bonding between complementary bases.) Explain!!!
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:**Question 7:**
Given what is known about DNA structure, which of the following general shapes might be found? (Horizontal lines represent bonding between complementary bases.) Explain!
**Diagrams:**
1. The first diagram resembles a multi-armed structure with a central hub. From this hub, five elongated ovals extend outward symmetrically. Each pair of adjacent arms is connected by a series of horizontal lines, resembling rungs on a ladder. This suggests the presence of complementary base pairs, similar to the structure of DNA.
2. The second diagram appears as a semi-circular arc with horizontal lines spanning across its width. This shape can represent another type of folded or looped DNA structure, although it is not typical of the double helix model.
Both diagrams imply variations of base pairing and could represent different conformations or structural motifs beyond the classic double helix.
Expert Solution
Step 1
DNA is the helical structure of two antiparallel polynucleotide. Both the polynucleotides are wrapped in a right handed helix. Both the strand is stabilized by the H-bonds present between complementary base pairs. Helix has the diameter of 20 angstrom. Helix pitch is 33.2 angstrom. There are 10.4 base pairs present per helical turn.
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