DNA Structure and Function Quiz

Who performed X-Ray Crystallography of DNA in the 1950s?

• Rosalind Franklin

• Edwin Chargaff

• Watson and Crick

• Gregor Mendel

What did Edwin Chargaff's analysis of DNA samples reveal?

• The amount of adenine equals the amount of thymine

• The amount of cytosine equals the amount of thymine

• The amount of adenine equals the amount of guanine

• The amount of cytosine equals the amount of guanine

Which of the following is a purine nucleotide?

• Cytosine

• Adenine

• Thymine

• Uracil

How many hydrogen bonds hold adenine and thymine together in DNA?

• One

• Two

• Three

• Four

What did Watson and Crick combine to create the first 3D, double helix model of DNA?

• Franklin's helix shape and Chargaff's base pairing

• Chargaff's rule and Watson's discovery

• Mendel's genetic experiments and Chargaff's rule

• Franklin's X-Ray Crystallography and Chargaff's analysis

What is the primary source of heritable information in most organisms?

• Mitochondrial DNA

• Chromosomal DNA

• Plasmids

• RNA

Where is DNA found in eukaryotic cells?

• Nucleoid region

• Cytoplasm

• Nucleus

• Mitochondria

What are plasmids primarily found in?

• Animal cells

• Prokaryotic cells

• Eukaryotic cells

• Plant cells

Which of the following is a key difference between RNA and DNA?

• RNA is double stranded and DNA is single stranded

• RNA has thymine and DNA has uracil

• DNA is single stranded and RNA is double stranded

• DNA has adenine and RNA has guanine

What did Chargaff's rule state?

• The amount of A=T and amount of C=G in the DNA

• The amount of A=C and amount of T=G in the DNA

• The amount of A=G and amount of C=T in the DNA

• The amount of A=T and amount of C=T in the DNA