Question

the nucleotide t always pairs with
question 7
watson and crick (with franklins help) were the first to suggest that dna is a
question 8
in a molecule of double - stranded dna, the amount of adenine present is always equal to the amount of

Explanation:

• Question 1: In DNA, the base - pairing rules state that thymine (T) pairs with adenine (A) through two hydrogen bonds.
• Question 7: Watson and Crick, with the help of Rosalind Franklin's X - ray crystallography data, proposed the double - helix structure of DNA.
• Question 8: According to Chargaff's rules, in double - stranded DNA, the amount of adenine (A) is always equal to the amount of thymine (T), and the amount of cytosine (C) is always equal to the amount of guanine (G).

Answer:

• Question 1: B. A
• Question 7: B. double helix
• Question 8: C. Thymine