Frame Shift Mutations in DNA

The video explains frame shift mutations, which occur when nucleotides are inserted or deleted in numbers not divisible by three, leading to significant changes in protein synthesis. These mutations can alter every amino acid following the mutation, potentially causing premature stop codons or extended proteins. Frame shift mutations are often detrimental, linked to diseases like Tay-Sachs and resistance to HIV. The video emphasizes understanding the impact of these mutations on protein function.

What is the primary role of DNA in the cell?

• To store energy

• To transport nutrients

• To create proteins

• To fight infections

What defines a frame shift mutation?

• Duplication of a DNA segment

• Substitution of one nucleotide for another

• Insertion or deletion of nucleotides not in multiples of three

• Insertion or deletion of nucleotides in multiples of three

What happens when three nucleotides are inserted into a DNA sequence?

• It adds an amino acid without causing a frame shift

• It causes a stop codon to form

• It causes a frame shift mutation

• It deletes an amino acid

How does a frame shift mutation affect the protein sequence?

• It only affects the last amino acid

• It has no effect on the protein sequence

• It alters every amino acid after the mutation

• It changes only the first amino acid

What can a frame shift mutation potentially lead to in a protein sequence?

• A longer protein with no stop codon

• A shorter protein due to a premature stop codon

• No change in protein length

• A protein with more disulfide bonds

Which of the following diseases is associated with frame shift mutations?

• Diabetes

• Cystic Fibrosis

• Tay-Sachs Disease

• Alzheimer's Disease

How can frame shift mutations be beneficial?

• By enhancing protein stability

• By providing resistance to certain infections

• By improving nutrient absorption

• By increasing cell division

What is a common consequence of frame shift mutations on proteins?

• They become more stable

• They are often dysfunctional

• They gain additional functions

• They become resistant to degradation

What is the result of deleting two nucleotides from a DNA sequence?

• No change in the protein

• A frame shift mutation occurs

• A new protein is formed

• The DNA sequence becomes longer

What is the effect of a frame shift mutation on the length of a protein?

• It always lengthens the protein

• It has no effect on protein length

• It can either shorten or lengthen the protein

• It always shortens the protein