Regulation

The cell cycle is regulated by this

• cyclins

• stem cells

• cyclin-dependent kinases

• both cyclins and cyclin-dependent kinases

Tags

NGSS.HS-LS1-4

A(n) _____ is a stage in the eukaryotic cell cycle at which the cell examines internal and external cues and "decides" whether or not to move forward with division.

• checkpoint

• chromosome

• interphase

• tumor

Tags

NGSS.HS-LS1-4

In eukaryotes, proteins that help the RNA polymerase bind to the regulatory region for transcription are called ____________.

• transcription factors

• topoisomerase

• regulatory genes

• activators

Tags

NGSS.HS-LS1-1

A protein that binds to the operator and blocks the RNA polymerase

• regulator

• repressor

• activator

• corepressor

What does the Clean Air Act allow the EPA to regulate?

• Noise pollution

• All forms of carbon emissions

• Six criteria air pollutants

• Water pollution levels

Hormones travel through the blood and encounter many cells. How do they affect ONLY target cells?

• Target cells have receptors that match up with the hormone

• Target cells send out signals that attach to hormones and draw them to the cell

• Target cells have cell membranes with a different composition

• Magic!

Tags

NGSS.HS-LS1-3

What does the lactose do to the Operon?

• Blocks transcription because of the energy it provides

• Allows the repressor to be unbind from the Operator.
  

• The lactose binds the lactose and stops transcription

• Allows for the transcription to speed

What is the name of the stretch of DNA where RNA polymerase binds?

• operator

• promoter

• enhancer

• regulatory gene

The "on/off" switch for an operon is called the

• promoter

• enhancer

• operator

• gene

A small molecule that binds to a repressor and makes it active

• repressor

• regulator

• activator

• corepressor