Gene Expression and Epigenetics Quiz

What was the initial assumption about DNA when it was first discovered?

• DNA is irrelevant to gene expression.

• DNA is only responsible for physical traits.

• DNA has no role in determining traits.

• DNA determines all traits and characteristics.

What does the term 'epigenetics' refer to?

• The study of genetic mutations.

• The study of how genes are turned on and off.

• The study of DNA replication.

• The study of protein synthesis.

Why do different cell types, like skin and kidney cells, have different functions?

• They use their genes differently.

• They have different numbers of chromosomes.

• They have different DNA sequences.

• They are located in different parts of the body.

What two factors are considered in determining who you are as a person?

• Diet and exercise

• DNA and environment

• Age and gender

• Education and culture

What is the primary focus when controlling gene expression?

• Mutation

• Translation

• Transcription

• Replication

How can the structure of DNA affect gene expression?

• By making DNA more compact or loose

• By changing the DNA sequence

• By modifying the genetic code

• By altering the number of chromosomes

What role do activator proteins play in gene expression?

• They turn transcription off.

• They assist RNA polymerase in binding.

• They destroy RNA transcripts.

• They change the DNA sequence.

What is the function of repressor proteins?

• To replicate DNA

• To block RNA polymerase binding

• To enhance transcription

• To initiate translation

What is the significance of regulatory elements in gene expression?

• They are sites where activators and repressors bind.

• They are responsible for protein synthesis.

• They are involved in DNA replication.

• They determine the number of genes in a cell.

What happens if RNA polymerase cannot access the DNA?

• DNA replication is initiated.

• Translation begins immediately.

• Transcription is inhibited.

• Transcription occurs normally.