Molecular Genetics Test Review

Which scientists won the Nobel Prize for the discovery of DNA?

• Erwin Chargaff & Linneus Pauling

• Rosalind Franklin & Linneus Pauling

• James Watson & Erwin Chargaff

• James Watson & Francis Crick

What of the following would be a correct pairing of nitrogen bases according to the base pairing rule?

• Adenine & Thymine

• Thymine & Cytosine

• Cytosine & Adenine

• Guanine & Adenine

In DNA, the nitrogen bases on the inside of the strand always bond to what on the outside of the strand?

• Another nitrogen base

• Deoxyribose sugar

• Ribose sugar

• Phosphate

Which of the following is NOT a major difference between DNA & RNA?

• The sugar

• The number of strands

• The nitrogen bases

• The phosphate group

Is the following strand DNA or RNA? How do you know?

1. TAC GGC TCC ATG

• DNA because it has thymine

• DNA because it has uracil

• RNA because it has thymine

• RNA because it has uracil

Which of the following is NOT a part of a RNA nucleotide?

• Phosphate group

• Nitrogen base

• Ribose sugar

• Deoxyribose sugar

Why is DNA replication important?

• It is needed to make more cells.

• It ensures that accurate copies of the genetic code get passed down.

• Both A & B

• None of the above

Which enzyme is used to bring in and position nucleotides during DNA replication?

• DNA Ligase

• DNA Helicase

• DNA Polymerase

• RNA Polymerase

The image below shows a DNA double helix that is about to undergo replication to produce two new DNA molecules. Which image best represents the two new DNA molecules? (Note: The original strands are shown as thick lines, and the newly made DNA strands are shown as thin lines.)

• 
• 
• 
• 

Which statement about the DNA double helix is true?

• Adenine and cytosine pair together, and guanine and thymine pair together.

• It allows for fully conservative replication.

• The two strands are antiparallel.

• The double helix is made up of a single, continuous strand of DNA.