Which of the following accurately describes the role of Rosalind Franklin in the elucidation of DNA structure?

A. She proposed the double helix model

B. She discovered the complementary base pairing

C. She produced the X-ray diffraction images that were crucial for the model

D. She identified the three basic components of DNA

What is the significance of the anti-parallel nature of the DNA strands in the double helix model?

A. It allows for complementary base pairing

B. It prevents DNA replication

C. It stabilises the phosphate backbone

D. It facilitates the formation of hydrogen bonds between nitrogenous bases

Which nitrogenous base forms two hydrogen bonds with its complementary base?

A. Adenine

B. Guanine

C. Cytosine

D. Thymine

What is the role of deoxyribose sugar in a nucleotide?

A. It forms hydrogen bonds with complementary bases

B. It connects the phosphate group to the nitrogenous base

C. It adds stability to the DNA helix

D. It facilitates DNA replication

During DNA replication, which enzyme facilitates the formation of phosphodiester bonds between nucleotides?

A. Helicase

B. DNA polymerase

C. Ligase

D. Topoisomerase

a) Elucidate the three basic components of a nucleotide in DNA and explain how they combine to form a nucleotide. [4]

b) Discuss the significance of complementary base pairing in terms of DNA stability and replication. [3]

a) Describe Watson and Crick's double helix model of DNA, highlighting the anti-parallel nature of the two DNA strands. [4]

b) Explain the implications of Rosalind Franklin's x-ray diffraction images on the development of the double helix model. [3]

a) Define the term "anti-parallel" in the context of DNA structure and explain its significance in DNA replication. [3]

b) Discuss how the polymerisation of nucleotides leads to the formation of a DNA strand. [4]

a) Outline the role of each of the three basic components of a nucleotide in DNA. [3]

b) Explain how the structure of DNA contributes to its function in storing genetic information. [4]

c) Discuss the impact of a mutation that alters the sequence of nitrogenous bases in a DNA strand. [3]

a) Describe the contribution of Rosalind Franklin in the discovery of the DNA double helix structure. [3]

b) Explain the significance of the anti-parallel nature of DNA strands in the process of DNA replication. [4]

c) How does complementary base pairing contribute to the accuracy of DNA replication? [3]