AP Biology Unit 6 Post-test

Front

What is post-transcriptional control of gene expression?

Back

Post-transcriptional control refers to the regulation of gene expression after the transcription process, including processes like splicing, where introns are removed and exons are joined together.

Front

What enzyme is responsible for joining the fragments on the lagging strand during DNA replication?

Back

Ligase is the enzyme that joins Okazaki fragments on the lagging strand.

Front

What are introns?

Back

Introns are non-coding segments of a gene that do not code for amino acids in a protein.

Front

What is the role of helicase in DNA replication?

Back

Helicase is the enzyme responsible for unzipping the DNA strands, separating the two strands to allow replication.

Front

How do muscle cells and nerve cells have the same DNA but different functions?

Back

Muscle cells and nerve cells express different proteins, which leads to their distinct functions despite having the same DNA.

Front

What is the function of DNA polymerase?

Back

DNA polymerase is the enzyme responsible for synthesizing new DNA strands by adding nucleotides complementary to the template strand during DNA replication.

Front

What are exons?

Back

Exons are the coding regions of a gene that are expressed and translated into proteins.

Front

What is gene amplification?

Back

Gene amplification is the process by which certain genes are replicated in excess, which can contribute to cancer by increasing the expression of oncogenes.

Front

What is the significance of transcription factors?

Back

Transcription factors are proteins that bind to specific DNA sequences to regulate the transcription of genes, playing a crucial role in gene expression.

Front

What is the central dogma of molecular biology?

Back

The central dogma describes the flow of genetic information from DNA to RNA to protein, outlining the processes of transcription and translation.