DNA Structure, Function, and Replication

What kind of molecule is DNA?

• nucleic acid

• protein

• lipid

• carbohydrate

What does DNA stand for?

• double nucleic acid

• deoxyribonucleic acid

• dextrose nucleic acid

• dinucleic acid

What is the monomer (building block) of a DNA molecule?

• nucleotide

• fatty acid

• nucleic acid

• amino acid

What sugar is found in a nucleotide of DNA?

• ribose

• dextrose

• deoxyribose

• glucose

What makes up the "backbone" of a single DNA strand?

• ribose and deoxyribose

• phosphate and sugar

• phosphate and nitrogenous base

• sugar and nitrogenous base

What kind of bonds hold together the nitrogenous bases at the center of the double helix structure?

• covalent bonds

• ionic bonds

• hydrogen bonds

• metallic bond

What are the correct base pairs?

• A and G, C and T

• A and T, C and G

• A and C, G and T

• A and A, G and G, C and C, T and T

Whose discovery about base ratios led to the rule of base pairing?

• Rosalind Franklin

• Watson and Crick

• Maurice Wilkins

• Erwin Chargaff

Who built the model of DNA using research from other scientists that helped us understand how DNA could replicate?

• James Watson and Francis Crick

• Francis Crick and Erwin Chargaff

• James Watson and Maurice Wilkins

• Rosalind Franklin and Maurice Wilkins

Why can bacteria recognize a human gene and then produce a human protein?

• Cell division in bacteria and humans is the same.

• The basic DNA components are the same in humans and bacteria.

• Bacterial cells contain the same organelles as human cells.

• Bacteria and human cells have the same number of chromosomes.