Understanding Mutations and Sickle Cell Anemia

What is the role of DNA polymerase in point mutations?

• It causes point mutations to occur.

• It fixes mistakes in DNA replication.

• It translates DNA into proteins.

• It deletes incorrect nucleotides.

What is the result of a 'silent mutation'?

• A change in the amino acid sequence.

• No change in the protein structure or function.

• A complete stop in protein synthesis.

• A change in the DNA sequence that causes disease.

What causes sickle cell anemia?

• A deletion mutation in the hemoglobin gene.

• A point mutation that alters the hemoglobin protein.

• A duplication of the hemoglobin gene.

• A silent mutation in the hemoglobin gene.

What is the function of hemoglobin in red blood cells?

• To transport oxygen molecules.

• To produce energy for the cell.

• To replicate DNA.

• To fight infections.

What happens to red blood cells in sickle cell anemia?

• They become larger and more flexible.

• They lose their ability to carry oxygen.

• They take on a sickle shape and block blood vessels.

• They replicate uncontrollably.

What is the result of the substitution of valine for glutamic acid in hemoglobin?

• Hemoglobin becomes more efficient at carrying oxygen.

• Hemoglobin subunits form long, rigid chains.

• Hemoglobin is unable to bind to iron atoms.

• Hemoglobin becomes more flexible.

Which mutation introduces a stop codon?

• Mutation 1

• Mutation 2

• Mutation 3

• None of the above

What is the structure of hemoglobin in normal red blood cells?

• It has two subunits and no iron atoms.

• It has four subunits, each with an iron atom.

• It has a single subunit with multiple iron atoms.

• It has no subunits or iron atoms.

What is the primary symptom of sickle cell anemia?

• Increased oxygen transport.

• Fatigue and blocked blood vessels.

• Rapid cell division.

• Increased hemoglobin production.

What is the purpose of the flow chart in the 'Model' section?

• To show the process of DNA replication.

• To explain the effects of a mutation on protein synthesis and symptoms.

• To identify the structure of hemoglobin.

• To demonstrate the process of cell division.