Understanding DNA Structure and Function

What is the length of DNA if all chromosomes in a single cell are unwound?

• 12 feet

• 9 feet

• 6 feet

• 3 feet

Who were the scientists that proposed the model of DNA's molecular structure?

• Albert Einstein and Niels Bohr

• Marie Curie and Rosalind Franklin

• James D. Watson and Francis Crick

• Charles Darwin and Gregor Mendel

What is the main reason most protein-DNA contacts occur in the major groove?

• The major groove is wider

• The minor groove is more acidic

• The major groove is more hydrophobic

• The minor groove is too narrow

How many hydrogen bonds stabilize a guanine-cytosine pair?

• Three

• Two

• Four

• One

What determines the characteristics of a life form according to the transcript?

• The sugar-phosphate backbone

• Short sections of a DNA molecule called genes

• The number of chromosomes

• The length of DNA