| Direction: Read the following and answer the questions that follows. |
| DNA is made up of millions of nucleotides. These are molecules composed of a deoxyribose sugar, with a phosphate and a base (or nucleobase) attached to it. These nucleotides are attached to each other in strands via phosphodiester bonds to form a 'sugar phosphate backbone'. DNA replication also known as semiconservative replication is the process by which DNA is essentially double. It is an important process that takes place within the dividing cell. |
| Assertion [A] The double helix model of DNA resembles a twisted ladder. |
| Reason [R] In DNA helix, purine and pyrimidines are found. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true, but R is not the correct explanation of A.
C) A is true, but R is false
D) A is false, but R is true
Correct Answer: B
Solution :
Both A and R are true, but R is not the correct explanation of A.
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