Test: Unit 6 Gene Expression and Regulation

Front

What is the base pairing rule in DNA?

Back

In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).

Front

What percentage of thymine would you expect if DNA contains 22% cytosine?

Back

28% thymine, according to Chargaff's rules.

Front

What is the role of mRNA in gene expression?

Back

mRNA serves as a template for protein synthesis, carrying genetic information from DNA to the ribosome.

Front

What is the semi-conservative model of DNA replication?

Back

In this model, each new DNA molecule consists of one old (parental) strand and one newly synthesized strand.

Front

What is an operon?

Back

An operon is a cluster of genes under the control of a single promoter, functioning together in a regulatory mechanism.

Front

What is an inducible operon?

Back

An inducible operon is a type of operon that is normally off but can be turned on in response to an inducer.

Front

What is the function of the 5' cap in eukaryotic mRNA?

Back

The 5' cap protects mRNA from degradation and assists in ribosome binding during translation.

Front

What is the significance of RNA splicing?

Back

RNA splicing removes introns and joins exons, producing a mature mRNA molecule that can be translated into protein.

Front

What is the difference between transcription and translation?

Back

Transcription is the process of synthesizing RNA from a DNA template, while translation is the process of synthesizing proteins from mRNA.

Front

What is the role of tRNA in protein synthesis?

Back

tRNA transports specific amino acids to the ribosome, matching them to the corresponding codons on the mRNA.