AP Biology (2015) - Unit 3.B - Gene Expression PPT

AP Biology (2015) - Unit 3.B - Gene Expression PPT
AP Biology (2015) - Unit 3.B - Gene Expression PPT
AP Biology (2015) - Unit 3.B - Gene Expression PPT
AP Biology (2015) - Unit 3.B - Gene Expression PPT
AP Biology (2015) - Unit 3.B - Gene Expression PPT
AP Biology (2015) - Unit 3.B - Gene Expression PPT
AP Biology (2015) - Unit 3.B - Gene Expression PPT
AP Biology (2015) - Unit 3.B - Gene Expression PPT
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9 MB|42 pages
Product Description
This 42-slide package of teaching PowerPoint presentations covers all of 3.B (Gene Expression) in the AP Biology (2015) curriculum. Each slide includes the 'Essential Knowledge' being covered as well as key terms that students should make note of (editable).

Unit 3.B includes four sections:

     • 3.B.1 - Gene Regulation
     • 3.B.2 - Signal Transmission

The presentations themselves contains minimal information as they are intended to be used with teacher guidance. There are 'Video' slides which link to relevant and informative YouTube content. The slides are formatted to be visually pleasing and to also print well for handouts or revision. Please see the preview file (first 8 slides) for an idea of the aesthetic and level of detail in the presentation. The relevant 'Essential Knowledge' can be found below.

Suggested Use:

I have had success using these presentations to review topics after students have been exposed to the material at home. I typically have the class read relevant material (book, site, etc.) and then watch the videos the day before introducing a topic. During the class period, I use the slides to structure the discussion around the AP Bio Essential Knowledge objectives. The remaining class time is spent reinforcing the knowledge or working on activities geared toward the 'Learning Objectives'.

I have included PDF version of the PowerPoints for handout purposes.

**These presentations are based on the AP Biology Course Guide and does not follow any textbook

As always, please let me know if you have any suggestions for improvements. These are always a work in progress!


Dokimi AP Biology PPTs:

AP Biology PPT Bundle (Big Ideas 1-4)

Big Idea 1 - Evolution (BUNDLE)

     • 1.A - Evolution (all)n
          1.A.1 - Natural Selection
          1.A.2/3 - Phenotypic Variation & Genetic Drift
          1.A.4 - Evidence for Evolution
     • 1.B - Phylogeny
     • 1.C - Speciation
     • 1.D - Origin of Life

Big Idea 2 - Matter (BUNDLE)

     • 2.A - Energy & Matter (all)
     • 2.B - Cell Membrane
     • 2.C - Feedback & Response
     • 2.D - Environmental Effects
     • 2.E - Regulation & Coordination

Big Idea 3 - Information (BUNDLE)

     • 3.A - Inheritance (all)
          3.A.1 - DNA & RNA
          3.A.2 - Cell Division
          3.A.3 - Mendelian Patterns
          3.A.4 - Non-Mendelian Patterns (free)
     • 3.B - Gene Regulation
     • 3.C - Genetic Variation
     • 3.D - Cell Communication
     • 3.E - Communication

Big Idea 4 - Interactions & Complexity (BUNDLE)

     • 4.A - Interactions (all)
          4.A.1 - Biomolecules
          4.A.2/3/4 - Differentiation, Organelles & Organ System Interactions
          4.A.5/6 - Community & Ecosystem Interactions
     • 4.B - Competition & Cooperation
     • 4.C - Diversity


3.B - Gene Regulation

Expression of genetic information involves cellular and molecular mechanisms.

3.B.1 - Gene Regulation

Gene regulation results in differential gene expression, leading to cell specialization.

a. Both DNA regulatory sequences, regulatory genes, and small regulatory RNAs are involved in gene expression.

- 1. Regulatory sequences are stretches of DNA that interact with regulatory proteins to control transcription.
- 2. A regulatory gene is a sequence of DNA encoding a regulatory protein or RNA.

b. Both positive and negative control mechanisms regulate gene expression in bacteria and viruses.

- 1. The expression of specific genes can be turned on by the presence of an inducer.
- 2. The expression of specific genes can be inhibited by the presence of a repressor.
- 3. Inducers and repressors are small molecules that interact with regulatory proteins and/or regulatory sequences.
- 4. Regulatory proteins inhibit gene expression by binding to DNA and blocking transcription (negative control).
- 5. Regulatory proteins stimulate gene expression by binding to DNA and stimulating transcription (positive control) or binding to repressors to inactivate repressor function.
- 6. Certain genes are continuously expressed; that is, they are always turned “on,” e.g., the ribosomal genes.

c. In eukaryotes, gene expression is complex and control involves regulatory genes, regulatory elements and transcription factors that act in concert.

- 1. Transcription factors bind to specific DNA sequences and/or other regulatory proteins.
- 2. Some of these transcription factors are activators (increase expression), while others are repressors (decrease expression).
- 3. The combination of transcription factors binding to the regulatory regions at any one time determines how much, if any, of the gene product will be produced.

d. Gene regulation accounts for some of the phenotypic differences between organisms with similar genes.

3.B.2 - Signal Transmission

A variety of intercellular and intracellular signal transmissions mediate gene expression.

a. Signal transmission within and between cells mediates gene expression.

- Cytokines regulate gene expression to allow for cell replication and division.
- Mating pheromones in yeast trigger mating gene expression.
- Expression of the SRY gene triggers the male sexual development pathway in animals.
- Ethylene levels cause changes in the production of different enzymes, allowing fruits to ripen.
- Seed germination and gibberellin.

b. Signal transmission within and between cells mediates cell function.

- Morphogens stimulate cell differentiation and development.
- Changes in p53 activity can result in cancer.
- HOX genes and their role in development.
Total Pages
42 pages
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