DNA Structure and Function Concepts

How many strands of genetic material make up a DNA molecule?

• One

• Two

• Three

• Four

What is the twisted ladder shape of DNA called?

• Single helix

• Double helix

• Triple helix

• Spiral ladder

What are the small repeating units that make up a DNA polymer?

• Proteins

• Amino acids

• Nucleotides

• Sugars

Which three parts make up a single nucleotide?

• Phosphate, sugar, and base

• Sugar, protein, and base

• Amino acid, phosphate, and sugar

• Base, enzyme, and sugar

How many different types of bases are found in DNA?

• Two

• Three

• Four

• Five

What part of the DNA molecule forms the protective outer casing, also known as the backbone?

• The bases

• The sugar-phosphate chain

• The amino acids

• The proteins

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

• Guanine (G)

• Cytosine (C)

• Thymine (T)

• Uracil (U)

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

• Adenine (A)

• Thymine (T)

• Guanine (G)

• Uracil (U)

What is a group of three bases in a DNA sequence called that codes for a specific amino acid?

• A gene

• A polymer

• A triplet

• A nucleotide

What is the complementary base paring for this triplet?

TGC

(a)