IB Biology - Unit 7 Revision

Which scientists provided evidence that DNA, rather than protein, was the genetic material?

• Hershey & Chase
• Crick & Watson
• Florey & Chain
• Meselson & Stahl

What work by Rosalind Franklin helped provide evidence that DNA was a helix shape?

• Polymerase Chain Reaction
• X-ray diffraction
• Gel electrophoresis
• DNA profiling

What proteins are associated with eukaryotic DNA?

• Enzymes
• Histones
• Collagen
• Immunoglobulins

What are the structures formed when DNA is wrapped around histone proteins?

• Nucleosome
• Nucleotome
• Nucleostome
• Nucleochrome

DNA strands run antiparallel to each other. If one strand is called the leading strand, what is the other strand called?

• Following
• Recessive
• Lagging
• Reverse

One DNA strand is replicated in a discontinuous manner. What is the name of the fragments that are formed and must be joined together?

• Kazoki fragments
• Okazaki fragments
• Kozikio fragments
• Zakioko fragments

Which enzyme in DNA replication releases the strain caused by unwinding the DNA?

• DNA Ligase
• DNA Primase
• DNA Topoisomerase
• DNA Polymerase

Which proteins prevent the two strands from joining back together before replication has occurred?

• Single-stranded binding proteins
• DNA Topoisomerase
• DNA Primase
• Histones

What must be added in order for DNA polymerase to start adding nucleotides in DNA replication?

• RNA Primer
• tRNA
• mRNA
• Helicase

Which enzyme replaces the RNA primers with the correct DNA nucleotides?

• DNA Polymerase III
• DNA Polymerase I
• DNA Polymerase IV
• DNA Polymerase II