DNA Structure and Function Concepts

How many strands make up a DNA molecule?

• One

• Two

• Three

• Four

What type of molecule is DNA, made up of many repeating smaller units?

• A monomer

• A polymer

• A protein

• A lipid

What are the individual repeating units that make up DNA called?

• Amino acids

• Monosaccharides

• Nucleotides

• Fatty acids

Which three components are found in every nucleotide?

• Sugar, protein, and base

• Phosphate, sugar, and base

• Phosphate, lipid, and base

• Sugar, amino acid, and base

What component of a nucleotide determines its specific type (e.g., A, T, C, G)?

• The phosphate group

• The sugar molecule

• The base

• The hydrogen bonds

What are the four different types of bases found in DNA?

• Adenine, Uracil, Cytosine, Guanine

• Adenine, Thymine, Cytosine, Guanine

• Adenine, Thymine, Uracil, Ribose

• Adenine, Cytosine, Glucose, Thymine

How do individual nucleotides connect to form a single strand of DNA?

• The phosphate of one nucleotide bonds to the phosphate of the next.

• The sugar of one nucleotide bonds to the sugar of the next.

• The phosphate of one nucleotide bonds to the sugar of the next.

• The base of one nucleotide bonds to the base of the next.

What is the name given to the long chain formed by the alternating sugars and phosphates in a DNA strand?

• Protein backbone

• DNA ladder

• Sugar-phosphate backbone

• Nucleotide chain

In DNA, which base always pairs with Adenine (A)?

• Cytosine (C)

• Guanine (G)

• Thymine (T)

• Uracil (U)

In DNA, which base always pairs with Cytosine (C)?

• Adenine (A)

• Guanine (G)

• Thymine (T)

• Uracil (U)