Neural Signals and the Operon

1. What term was coined by Jacob, Lwoff, and Monod in the 1960s to describe a unit of genetic function in bacteria?

• A) Gene

• B) Chromosome

• C) Operon

• D) DNA

2. Which of the following is NOT a component of an operon?

• A) Promoter

• B) Repressor

• C) Ribosome

• D) Operator

3. What is the function of the repressor in an operon?

• A) Initiates gene transcription

• B) Replicates DNA

• C) Prevents gene transcription

• D) Regulates protein translation

In a lac Operon, what molecule binds to the repressor to activate gene transcription?

• A) Glucose

• B) Tryptophan

• C) Lactose

• D) Sucrose

Which operon is designed to deal with the absence of tryptophan in bacteria?

• A) Lac Operon

• B) Trp Operon

• C) Gal Operon

• D) Mal Operon

What is the purpose of an operon in bacteria?

• A) Produce proteins

• B) Control gene expression

• C) Regulate cell division

• D) Synthesize lipids

Which ions are involved in an action potential?

• Na; Cl

• Na; K

• K; Cl

• Na; Ca

Action potentials run along the ______ from ______ to ________.

• axon, dendrites, axon terminals

• axon, axon terminals, dendrites

• dendrites, axon, axon terminals

• axon terminals, axon, dendrites

Which of the following is involved in maintaining the resting membrane potential of neurons?

• Na+/K+ ATPase pump moves 3Na+ in for every 2K+ out

• Na+/K+ ATPase pump moves 3K+ in for every 2Na+ out

• Na+/K+ ATPase pump moves 3Na+ out for every 2K+ in

• Na+/K+ ATPase pump moves 3K+ out for every 2Na+ in

At resting membrane potential, neurons have more​ (a)   on the outside of the cell membrane.

• Na+

• K+

• NaCl

• Cl-