Mutations

Open Ended

What is one example of a naturally occurring mutagen?

Multiple Choice

Which of the following contains all mutagens?

• Radio waves, chlorophyll, mustard gas

• X-rays, alkylating agents, reactive oxygen species (ROS)

• Microwaves, mRNA, polymerase

• Infrared light, deaminating agents, haemoglobin

Multiple Choice

What is a key feature of a point mutation?

• Point mutation only influences one nucleotide​

• Point mutation only changes one amino acid​

• In point mutation, one nucleotide is inserted, deleted, or substituted​

• In point mutation, one chromosome experiences an insertion, deletion, or substitution​

Multiple Choice

Which is a likely cause of a chromosome rearrangement?​

• An alkylating agent

• A silent point mutation

• Translocation

• Non-disjunction

Multiple Choice

What is the difference between somatic and germ-line mutations?

• Somatic mutations are transmitted to offspring

• Germ-line mutations are transmitted to offspring

• Somatic mutations occur only in ‘coding’ DNA segments

• Germ-line mutations occur only in ‘coding’ DNA segments

Open Ended

Distinguish between somatic mutations and germ-line mutations and their effect on an organism (4 marks)

Multiple Choice

What is the significance of mutations in the ‘coding’ region of DNA?

• New alleles are created

• The DNA molecule becomes longer

• The organism has less chance of survival

• It prevents successful mitosis and cell division