AP Biology · Unit 4
Cell Communication and Cell Cycle
In short
Unit 4: Cell Communication and Cell Cycle in AP Biology covers 6 topics: Cell Communication, Introduction to Signal Transduction, Signal Transduction Pathways, Feedback and 2 more. Open each one for what you need to know, a self-check list and how it is tested on the exam.
Last updated
What is in Unit 4: Cell Communication and Cell Cycle?
Unit 4: Cell Communication and Cell Cycle
4.1 Cell Communication
- I can describe how cells communicate through direct contact or chemical signaling from a distance.
- I can explain how cells use local regulators to communicate over short distances.
- I can explain how signals released by one cell type travel long distances to target other cell types.
4.2 Introduction to Signal Transduction
- I can explain that signal transduction pathways often include protein modifications and phosphorylation cascades.
- I can describe how signaling begins with a ligand binding to a specific receptor protein, such as a G protein-coupled receptor, either on the cell surface or intracellularly.
- I can describe how signaling cascades relay and amplify signals using enzymes and second messengers like cAMP to produce cellular responses such as gene expression or cell growth.
4.3 Signal Transduction Pathways
4.4 Feedback
- I can describe how negative feedback mechanisms return a perturbed system back to its target set point by reducing the initial stimulus.
- I can explain how positive feedback mechanisms amplify responses by moving the variable further from the initial set point to produce system change.
4.5 Cell Cycle
- I can describe the sequential stages of the cell cycle (G1, S, G2, mitosis, cytokinesis) and explain the specific cellular events that occur in each phase, including the G0 stage.
- I can explain how mitosis ensures the transmission of a complete genome from a parent cell to two genetically identical daughter cells.
- I can describe the sequential steps of mitosis (prophase, metaphase, anaphase, telophase) and cytokinesis, detailing the movement of chromosomes and cellular structures in each step.
4.6 Regulation of Cell Cycle
Cell Communication and Cell Cycle: common questions
What is in Unit 4: Cell Communication and Cell Cycle?
It covers 6 topics: 4.1 Cell Communication; 4.2 Introduction to Signal Transduction; 4.3 Signal Transduction Pathways; 4.4 Feedback; 4.5 Cell Cycle; 4.6 Regulation of Cell Cycle.
Can I get one-to-one help with AP Biology?
AP Guru offers one-on-one online tutoring. Book a free consultation to talk through AP Biology, your exam date and the topics you find hardest.
Want help mastering this topic?
Work through Cell Communication and Cell Cycle one-on-one with an AP Guru tutor.
Book a free demo class