The video explains DNA as a polymer made of nucleotides, each consisting of a sugar, phosphate, and base. It details the structure of DNA, highlighting the sugar-phosphate backbone and the four bases: A, T, C, and G. The video covers base pairing rules, where A pairs with T and C pairs with G, and explains how DNA sequences code for proteins by specifying amino acids. The order of bases determines the protein produced by a cell.

What are the three components of a nucleotide in DNA?

• Phosphate, base, and protein

• Sugar, phosphate, and base

• Base, lipid, and sugar

• Sugar, phosphate, and lipid

Which of the following correctly describes the backbone of a DNA strand?

• Base and lipid chain

• Sugar and protein chain

• Sugar and phosphate chain

• Phosphate and protein chain

In DNA base pairing, which base does adenine (A) pair with?

• Adenine (A)

• Thymine (T)

• Guanine (G)

• Cytosine (C)

How many bases in a DNA sequence code for a single amino acid?

• Four

• Three

• One

• Two

What determines the protein produced by a cell?

• The type of sugar in the backbone

• The order of amino acids

• The number of nucleotides

• The length of the DNA strand