Frame Shift Mutations and Their Effects

The video explains frame shift mutations, which occur when nucleotide additions or deletions alter the reading frame of mRNA, leading to changes in protein sequences. These mutations can have significant effects on cellular function, potentially causing harmful proteins and cell apoptosis. The video emphasizes the importance of genetic stability to prevent such mutations.

What is the primary role of mRNA in the process of protein synthesis?

• To serve as a template for protein synthesis

• To replicate DNA

• To transport amino acids

• To store genetic information

How many nucleotides make up a codon?

• Four

• Three

• Two

• Five

What happens to the protein sequence when a nucleotide is added to the mRNA?

• The reading frame shifts, altering the protein sequence

• The protein sequence remains unchanged

• The protein sequence is shortened

• The protein sequence is duplicated

Which amino acid does the codon CAA code for?

• Serine

• Glutamine

• Arginine

• Proline

What is the effect of a frame shift mutation on the downstream amino acid sequence?

• It has no effect on the amino acid sequence

• It affects all downstream amino acids

• It affects only the first amino acid

• It duplicates the downstream amino acids

What is a potential consequence of a frame shift mutation on a cell?

• Increased cell growth

• No effect on the cell

• Cell apoptosis

• Enhanced protein function

Which type of mutation involves the removal of a nucleotide?

• Addition mutation

• Deletion mutation

• Transition mutation

• Transversion mutation

What is the result of adding two nucleotides to an mRNA sequence?

• The reading frame remains unchanged

• The reading frame shifts by two nucleotides

• The reading frame shifts by one nucleotide

• The reading frame shifts by three nucleotides

Which of the following is NOT a cause of frame shift mutations?

• Replication

• Transition

• Addition

• Deletion

What is the main reason frame shift mutations are considered devastating?

• They only affect a single amino acid

• They cause a complete stop in protein synthesis

• They alter the entire downstream protein sequence

• They have no significant impact on the cell