Question

level 3: identify the following parts of the dna molecule: hydrogen bonds, nucleotide, sugar - phosphate backbone, and base pairs
a=

b=

c=

d=

level 4: explain how the structure of dna allows it to replicate itself perfectly each time.

Explanation:

• A: Nucleotide - A nucleotide consists of a sugar, a phosphate group, and a nitrogen - containing base. In the image, it shows the basic unit structure.
• B: Hydrogen bonds - These are the weak bonds that hold the two strands of DNA together between the base pairs.
• C: Sugar - Phosphate backbone - The alternating sugar and phosphate groups form the structural framework of each DNA strand.
• D: Base pairs - The complementary bases (A - T, G - C) that pair up across the two strands of DNA.

For the second part, DNA's structure allows for perfect replication due to base - pairing rules. Adenine (A) always pairs with thymine (T) and guanine (G) always pairs with cytosine (C). During replication, the two strands separate, and each strand serves as a template. Free nucleotides in the cell bind to the exposed bases on the template strands according to these base - pairing rules, creating two identical DNA molecules.

Answer:

A: Nucleotide
B: Hydrogen bonds
C: Sugar - Phosphate backbone
D: Base pairs
The structure of DNA allows it to replicate itself perfectly each time because of the specific base - pairing rules (A - T, G - C) where each strand serves as a template for the synthesis of a new complementary strand.