DEBio 16 Vocab quiz

What is the role of a repressor in prokaryotic gene expression?

• It binds to the operator to prevent transcription.

• It enhances the binding of RNA polymerase to the promoter.

• It degrades mRNA after transcription.

• It adds a poly-A tail to mRNA.

Tags

NGSS_HS_LS3_1

Which molecule is left after energy is used to start translation?

• GTP

• GDP

• ATP

• ADP

Tags

NGSS_HS_LS3_1

Describe the function of the catabolite activator protein (CAP) in prokaryotic cells.

• It binds to the operator to repress transcription.

• It complexes with cAMP to bind to promoter sequences of operons.

• It degrades proteins in the proteasome.

• It adds methyl groups to DNA.

Tags

NGSS_HS_LS3_1

What is the primary function of an enhancer in gene expression?

• It silences genes through DNA methylation.

• It influences the transcription of a specific gene.

• It degrades mRNA molecules.

• It initiates translation by forming an initiation complex.

Tags

NGSS_HS_LS3_1

Explain the role of DNA methylation in gene expression.

• It increases transcription by binding to the promoter.

• It leads to gene silencing as an epigenetic modification.

• It enhances the translation of mRNA.

• It adds a poly-A tail to mRNA.

Tags

NGSS_HS_LS3_1

What is an inducible operon?

• An operon that is always active regardless of environmental conditions.

• An operon that can be activated or repressed depending on cellular needs.

• An operon that degrades proteins.

• An operon that silences genes through methylation.

Tags

NGSS_HS_LS3_1

Identify the molecule that provides energy for translation by binding to eIF-2.

• ATP

• GTP

• GDP

• ADP

Tags

NGSS_HS_LS3_1

What is the function of a transcription factor?

• It binds to the DNA at the promoter or enhancer region to influence transcription.

• It degrades proteins in the proteasome.

• It adds a poly-A tail to mRNA.

• It silences genes through DNA methylation.

Tags

NGSS_HS_LS3_1

How does an activator influence transcription in prokaryotic cells?

• It binds to the operator to prevent transcription.

• It binds to prokaryotic operators to increase transcription.

• It degrades mRNA after transcription.

• It adds methyl groups to DNA.

Tags

NGSS_HS_LS3_1

What is the role of the poly-A tail in mRNA?

• It initiates translation by forming an initiation complex.

• It protects the mRNA from degradation.

• It silences genes through DNA methylation.

• It enhances the binding of RNA polymerase to the promoter.

Tags

NGSS_HS_LS3_1