Exploring DNA Structure and Replication

What is DNA responsible for in living organisms?

• Respiration

• Digestion

• Genetic information

• Photosynthesis

Who discovered that DNA was a large spiral molecule?

• James Watson

• Francis Crick

• Rosalind Franklin

• Erwin Chargaff

What did Erwin Chargaff discover about the nitrogen bases in DNA?

• Adenine pairs with cytosine

• Thymine pairs with guanine

• Guanine pairs with adenine

• Adenine pairs with thymine

What is the shape of DNA as described by James Watson and Francis Crick?

• Quadruple helix

• Single helix

• Double helix

• Triple helix

What are the building blocks of DNA called?

• Amino acids

• Nucleotides

• Glucose molecules

• Fatty acids

What analogy is used to describe the relationship between DNA and genes?

• DNA is a recipe book, genes are recipes

• DNA is a map, genes are locations

• DNA is a library, genes are books

• DNA is a computer, genes are programs

What is the role of chromosomes in the cell?

• To contain DNA and genes

• To transport nutrients

• To store energy

• To produce proteins

What is the first step in DNA replication?

• Binding of nucleotides

• Unzipping of the DNA molecule

• Formation of complementary strands

• Attachment of DNA polymerase

Which enzyme is responsible for unzipping the DNA molecule during replication?

• Ligase

• Helicase

• Primase

• DNA polymerase

What is the final result of DNA replication?

• Two identical DNA molecules

• One new DNA molecule

• Two different DNA molecules

• One identical DNA molecule