Question 1:

What is the shape of the DNA molecule?

Explanation: A) The DNA molecule has a double helix structure. It consists of two strands that wind around each other in a twisted ladder-like shape.

Question 2:

What are the building blocks of DNA called?

Explanation: A) The building blocks of DNA are called nucleotides. Each nucleotide consists of a sugar molecule (deoxyribose), a phosphate group, and a nitrogenous base (adenine, thymine, cytosine, or guanine).

Question 3:

What holds the two strands of DNA together?

Explanation: A) The two strands of DNA are held together by hydrogen bonds. These bonds form between the nitrogenous bases of the two strands, specifically adenine (A) with thymine (T) and cytosine (C) with guanine (G).

Question 4:

What is the complementary base pair for adenine (A) in DNA?

Explanation: A) The complementary base pair for adenine (A) in DNA is thymine (T). Adenine always pairs with thymine, and cytosine (C) always pairs with guanine (G).

Question 5:

Which scientist(s) is credited with discovering the double helix structure of DNA?

Explanation: A) James Watson and Francis Crick are credited with discovering the double helix structure of DNA. Their groundbreaking work was based on X-ray crystallography data collected by Rosalind Franklin and Maurice Wilkins.