PS & Mutations

Front

What enables human bone, muscle, and nerve cells to perform specialized activities despite having the same number of chromosomes?

Back

The regulation of gene expression within each cell type.

Front

Why do cells differentiate?

Back

They have specific genes activated.

Front

Is it true that the mRNA strand is complementary to the DNA strand, with uracil pairing with adenine instead of thymine?

Back

True.

Front

What is the direct result of an error in the transcription of a DNA nucleotide?

Back

A codon sequence is incorrect.

Front

What causes the change in fur color of the arctic fox throughout the year?

Back

Gene expression for fur color is regulated by temperature.

Front

What is gene expression?

Back

The process by which information from a gene is used to synthesize a functional gene product, usually a protein.

Front

What is a mutation?

Back

A change in the DNA sequence that can lead to changes in gene function or expression.

Front

What role does mRNA play in protein synthesis?

Back

mRNA carries the genetic information from DNA to the ribosome, where proteins are synthesized.

Front

What is the difference between DNA and RNA?

Back

DNA contains thymine, while RNA contains uracil; DNA is double-stranded, RNA is single-stranded.

Front

What is transcription in the context of genetics?

Back

The process of copying a segment of DNA into RNA.