Multiple Choice
What type of chemical bond is responsible for holding together the paired bases in the DNA double helix?
7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
How many strands make up the structure of a typical DNA molecule?
A
Four
B
Two
C
One
D
Three
Verified step by step guidance1
Recall the basic structure of DNA, which is known as a double helix.
Understand that the double helix consists of two long strands twisted around each other.
Each strand is made up of a sugar-phosphate backbone and nitrogenous bases.
The two strands are complementary and held together by hydrogen bonds between paired bases.
Therefore, the typical DNA molecule is composed of two strands.
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