C5: DNA: Molecular Basis Of Life

Question 1

Question: What is DNA made up of?

Answer 1

Answer: nucleotides, which consist of deoxyribose sugar, a phosphate, and one of four nitrogenous bases.

Question 2

What are the two types of nitrogenous bases in DNA?

Answer 2

Answer: The two types of nitrogenous bases in DNA are purines (adenine and guanine) and pyrimidines (thymine and cytosine).

Question 3

Question: What did Erwin Chargaff discover about the amounts of purines and pyrimidines in DNA?

Answer 3

Answer: Erwin Chargaff discovered that the total amount of purines always equals the total amount of pyrimidines in DNA.

Question 4

Question: What is the term for the pairing of nucleotides in DNA?

Answer 4

Answer: The pairing of nucleotides in DNA is known as complementary base pairing.

Question 5

Question: What is a template in DNA replication?

Answer 5

Answer: A template is a single-stranded DNA sequence that acts as a guide for the synthesis of the complementary strand during replication.

Question 6

Question: What are Okazaki fragments?

Answer 6

Answer: Okazaki fragments are short sections of DNA that are synthesized on the lagging strand during DNA replication.