Q1CP Describe the structural differen... [FREE SOLUTION]

Chapter 24: Q1CP (page 847)

Describe the structural differences between A-, B- and Z-DNA including handedness, diameter and presence of grooves.

Short Answer

Expert verified

In terms of handedness, A-DNA is right handed, B-DNA is right handed and Z-DNA is left handed.

In terms of diameter, the A-DNA has a diameter approximately equal to $26 \overset{鈭�}{A}$ , B-DNA has a diameter approximately equal to $20 \overset{鈭�}{A}$ and Z-DNA has a diameter approximately equal to $18 \overset{鈭�}{A}$ .

In terms of the presence of grooves, A-DNA has a major groove that is narrow and deep and a minor groove that is wide and shallow.

B-DNA has a major groove that is wide and deep, and a minor groove that is narrow and deep.

Z-DNA has a major groove that is flat, and a minor groove that is narrow and deep.

Step by step solution

DNA

DNA is a two stranded polymer of deoxyribonucleotides connected by phosphodiester bonds. The most frequent form of DNA found biologically is termed as B-DNA. The important structural variants of DNA are termed A-DNA and Z-DNA.

Structural features of A, B and Z-DNA

The structural features of A, B and Z-DNA include:

In terms of handedness, A-DNA is right handed, B-DNA is right handed and Z-D
NA is left handed.
In terms of diameter, the A-DNA has a diameter approximately equal to $26 \overset{鈭�}{A}$ , B-DNA has a diameter approximately equal to $20 \overset{鈭�}{A}$ and Z-DNA has a diameter approximately equal to $18 \overset{鈭�}{A}$ .

In terms of the presence of grooves, A-DNA has a major groove that is narrow and deep and a minor groove that is wide and shallow. B-DNA has a major groove that is wide and deep, and a minor groove that is narrow and deep. Z-DNA has a major groove that is flat, and a minor groove that is narrow and deep.

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Describe the structural differences between A-, B- and Z-DNA including handedness, diameter and presence of grooves.

Short Answer

Step by step solution

DNA

Structural features of A, B and Z-DNA

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