Types of Mutations

The video explains the role of DNA in protein synthesis and how mutations can alter protein function. Mutations, which can be random or caused by mutagens, may lead to diseases like cancer or sickle cell disease, but can also drive evolution. The video distinguishes between point mutations, which affect a single DNA point, and frameshift mutations, which alter the DNA reading frame. It highlights the importance of avoiding mutagens to prevent harmful mutations.

What role does DNA play in living organisms?

• It digests food in the stomach.

• It transports oxygen in the blood.

• It carries instructions for building proteins.

• It provides energy for cells.

How can mutations in DNA affect an organism?

• They always cause diseases.

• They can only be harmful.

• They can be beneficial, harmful, or neutral.

• They have no effect on organisms.

What is a point mutation?

• A mutation that deletes a section of DNA.

• A mutation that adds extra DNA bases.

• A mutation that affects multiple genes.

• A mutation that changes a single DNA base.

Which disease is caused by a point mutation affecting red blood cells?

• Cystic fibrosis

• Sickle cell disease

• Diabetes

• High cholesterol

What is a frameshift mutation?

• A mutation that only affects non-coding DNA.

• A mutation that changes the reading frame of DNA.

• A mutation that has no effect on protein structure.

• A mutation that duplicates a gene.