Higher Biology Unit 1: DNA and the Genome Quiz

What is the basic structure of DNA?

• Circular loop

• Double helix

• Single helix

• Triple helix

Which type of bond holds the DNA strands in a double helix together?

• Peptide bonds

• Covalent bonds

• Hydrogen bonds

• Ionic bonds

What is found at the 3' end of a DNA strand?

• Phosphate group

• Deoxyribose sugar

• Amino group

• Hydroxyl group

Which of the following is a component of a DNA nucleotide?

• Phosphate group

• Amino acid

• Fatty acid

• Glycerol

What type of chromosomes do prokaryotes typically have?

• Circular chromosomes

• Linear chromosomes

• No chromosomes

• Fragmented chromosomes

What is the role of DNA polymerase in DNA replication?

• It adds nucleotides to the growing DNA strand

• It removes nucleotides from the DNA strand

• It folds the DNA into a helix

• It transports DNA into the nucleus

What is the function of ligase in DNA replication?

• Transcribing DNA to RNA

• Cutting the DNA strand

• Unwinding the DNA helix

• Joining fragments of DNA on the lagging strand

Which RNA type carries the genetic code from DNA to the ribosome?

• siRNA

• rRNA

• tRNA

• mRNA

What process involves the removal of introns from RNA?

• RNA replication

• RNA degradation

• RNA polymerization

• RNA splicing

What is the result of a missense mutation?

• A stop codon is introduced prematurely

• An entire gene is deleted

• One amino acid is changed for another

• The DNA becomes unreadable

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