Genetics Unit Quiz: DNA and RNA

What are nucleic acids primarily responsible for in living organisms?

• Transporting oxygen

• Building cell walls

• Carrying genetic material

• Providing energy

Which scientist's imagery was crucial for the discovery of DNA's structure?

• Gregor Mendel

• Rosalind Franklin

• Louis Pasteur

• Charles Darwin

What type of bond holds the nitrogen bases together in the DNA structure?

• Covalent bonds

• Metallic bonds

• Ionic bonds

• Hydrogen bonds

What does the term 'antiparallel' refer to in DNA structure?

• The strands run in the same direction

• The strands are parallel but not touching

• The strands run in opposite directions

• The strands are identical

In DNA, which end is associated with the phosphate group?

• Neither end

• Both ends

• 5' end

• 3' end

How does RNA differ from DNA in terms of structure?

• RNA is double-stranded

• RNA is single-stranded

• RNA contains thymine

• RNA has a deoxyribose sugar

What is the total number of chromosomes in a human cell?

• 46

• 23

• 37

• 74

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

• DNA polymerase

• Helicase

• Ligase

• Primase

What are Okazaki fragments associated with?

• RNA synthesis

• Lagging strand synthesis

• Protein synthesis

• Leading strand synthesis

What does 'semi-conservative replication' mean in the context of DNA replication?

• DNA is replicated with errors

• DNA is replicated without any changes

• Each new DNA molecule has one old and one new strand

• Each new DNA molecule has two new strands