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  • This is the question when working with pH and pKa. This is original artwork by the author and no copyright is violated.

    Taking the Hassle out of Hasselbalch

    Learning Objectives
    Students will be able to:
    1. Characterize an aqueous environment as acidic or basic.
    2. Explain that pKa is a measure of how easy it is to remove a proton from a molecule.
    3. Predict ionization state of a molecule at a particular pH based on its pKa (qualitative use of the Henderson-Hasselbalch equation).
    4. Calculate the ratio of protonated/unprotonated forms of ionizable groups depending on chemical characteristics and /or environment pH (quantitative use of the Henderson-Hasselbalch equation).
    5. Apply this knowledge in a medical context.
  • How Silly Putty® is like bone

    What do Bone and Silly Putty® have in Common?: A Lesson on Bone Viscoelasticity

    Learning Objectives
    • Students will be able to explain how the anatomical structure of long bones relates to their function.
    • Students will be able to define viscoelasticity, hysteresis, anisotropy, stiffness, strength, ductility, and toughness.
    • Students will be able to identify the elastic and plastic regions of a stress-strain curve. They will be able to correlate each phase of the stress-strain curve with physical changes to bone.
    • Students will be able to predict how a bone would respond to changes in the magnitude of an applied force, and to variations in the speed or angle at which a force is applied.
    • Students will be able to determine the reason(s) why bone injuries occur more frequently during athletic events than during normal everyday use.
  • Sample Student Growth Curve. This image shows a yeast growth curve generated by a student in our lab, superimposed on an image of Saccharomyces cerevisiae cells.

    Using Yeast to Make Scientists: A Six-Week Student-Driven Research Project for the Cell Biology Laboratory

    Learning Objectives
    • Learn about basic S. cerevisiae biology
    • Use sterile technique
    • Perform a yeast viability assay
    • Use a spectrophotometer to measure growth of S. cerevisiae
    • Perform a literature search
    • Calculate concentrations of chemicals appropriate for S. cerevisiae
    • Generate S. cerevisiae growth curves
    • Troubleshoot experimental difficulties
    • Perform statistical analysis
    • Present findings to an audience
  • Teaching Genetic Linkage and Recombination through Mapping with Molecular Markers

    Learning Objectives
    Students will be able to:
    • Explain how recombination can lead to new combinations of linked alleles.
    • Explain how molecular markers (such as microsatellites) can be used to map the location of genes/loci, including what crosses would be informative and why.
    • Explain how banding patterns on an electrophoresis gel represent the segregation of alleles during meiosis.
    • Predict how recombination frequency between two linked loci affects the genotype frequencies of the products of meiosis compared to loci that are unlinked (or very tightly linked).
    • Analyze data from a cross (phenotypes and/or genotypes) to determine if the cross involves linked genes.
    • Calculate the map distance between linked genes using data from genetic crosses, such as gel electrophoresis banding patterns.
    • Justify conclusions about genetic linkage by describing the information in the data that allows you to determine genes are linked.
  • Grow the Gradient game board. A student moves game pieces on the game board as they learn how the loop of Henle creates a salt concentration gradient in the medulla.

    Grow the Gradient: An interactive countercurrent multiplier game

    Learning Objectives
    • Students will be able to simulate the movement of water and sodium at each region of the loop of Henle.
    • Students will be able to associate osmosis and active transport with movement of water/solutes at each region of the loop of Henle.
    • Students will be able to model how the descending and ascending limbs of the loop of Henle maintain a concentration gradient within the medulla.
    • Students will be able to predict the effects of altering normal water and salt movement out of the loop of Henle on the salt concentration of the medulla, urine concentration, and urine volume.
    Advanced Learning Objectives for Extensions
    • Students will be able to predict the impact of the length of the loop of Henle on the magnitude of the concentration gradient within the medulla.
    • Students will be able to predict the length of the loop of Henle in organisms from different habitats.
  • Figure 2. ICB-Students come to class prepared to discuss the text
  • A photo of grizzly bears fishing in the McNeil Falls in Alaska, taken using BearCam by Lawrence Griffing.

    Authentic Ecological Inquiries Using BearCam Archives

    Learning Objectives
    Students will be able to:
    • conduct an authentic ecological inquiry including
      • generate a testable hypothesis based on observations,
      • design investigation with appropriate sampling selection and variables,
      • collect and analyze data following the design, and
      • interpret results and draw conclusions based on the evidence.
    • write a research report with appropriate structure and style.
    • evaluate the quality of inquiry reports using a rubric.
    • conduct peer review to evaluate and provide feedback to others' work.
    • revise the inquiry report based on peer feedback and self-assessment.
  • Structure of protein ABCB6

    Investigating the Function of a Transport Protein: Where is ABCB6 Located in Human Cells?

    Learning Objectives
    At the end of this activity students will be able to:
    • describe the use of two common research techniques for studying proteins: SDS-PAGE and immunoblot analysis.
    • determine a protein’s subcellular location based on results from: 1) immunoblotting after differential centrifugation, and 2) immunofluorescence microscopy.
    • analyze protein localization data based on the limitations of differential centrifugation and immunofluorescence microscopy.
  • Student-generated targeting construct from the construct ribbon parts

    Make It Stick: Teaching Gene Targeting with Ribbons and Fasteners

    Learning Objectives
    • Students will be able to design targeting constructs.
    • Students will be able to predict changes to the gene locus after homologous recombination.
    • Students will be able to design experiments to answer a biological question (e.g., "Design an experiment to test if the expression of gene X is necessary for limb development").
  • Plant ecology students surveying vegetation at Red Hills, CA, spring 2012.  From left to right are G.L, F.D, A.M., and R.P.  Photo used with permission from all students.

    Out of Your Seat and on Your Feet! An adaptable course-based research project in plant ecology for advanced students

    Learning Objectives
    Students will:
    • Articulate testable hypotheses. (Lab 8, final presentation/paper, in-class exercises)
    • Analyze data to determine the level of support for articulated hypotheses. (Labs 4-7, final presentation/paper)
    • Identify multiple species of plants in the field quickly and accurately. (Labs 2-3, field trip)
    • Measure environmental variables and sample vegetation in the field. (Labs 2-3, field trip)
    • Analyze soil samples using a variety of low-tech lab techniques. (Open labs after field trip)
    • Use multiple statistical techniques to analyze data for patterns. (Labs 4-8, final presentation/paper)
    • Interpret statistical analyses to distinguish between strong and weak interactions in a biological system. (Labs 4-7, final presentation/paper)
    • Develop and present a conference-style presentation in a public forum. (Lab 8, final presentation/paper)
    • Write a publication-ready research paper communicating findings and displaying data. (Lab 8, final presentation/paper)
  • Two cells stained

    Bad Cell Reception? Using a cell part activity to help students appreciate cell biology, with an improved data plan and...

    Learning Objectives
    • Identify cell parts and explain their function
    • Explain how defects in a cell part can result in human disease
    • Generate thought-provoking questions that expand upon existing knowledge
    • Create a hypothesis and plan an experiment to answer a cell part question
    • Find and reference relevant cell biology journal articles
  • CRISPR/Cas9 in yeast experimental overview

    CRISPR/Cas9 in yeast: a multi-week laboratory exercise for undergraduate students

    Learning Objectives
    Week 1: CRISPR design
    • Locate the coding sequence, flanking sequence, protein product, and characteristics of a given gene from the Saccharomyces Genome Database (
    • Design and defend the design of guide RNA and single stranded template for DNA repair in CRISPR/Cas9 gene editing studies to generate Saccharomyces cerevisiae auxotrophic mutants.
    Week 3-4: Cloning
    • Describe the qualities of the vector, pML104, that allow replication and selection in bacteria and yeast as well as allow expression of necessary factors in CRISPR/Cas9 genome editing, including Cas9 and sgRNA.
    • Describe the rationale of and perform procedures necessary for cloning a small cassette (i.e., sgRNA gene) into a vector (i.e., pML104) including; restriction digest, annealing of DNA strands, removal of 5’ phosphates, ligation, and transformation.
    • Recognize and design appropriate controls for cloning procedures such as ligation and transformation.
    Week 5: Screening clones
    • Describe the method of polymerase chain reaction (PCR), including the rationale for essential components of a reaction mixture and thermal-cycling conditions.
    • Locate the binding sites of and design primers for PCR, then report the expected size of the amplification product.
    • Describe and perform isolation of plasmid DNA from E. coli.  
    Week 6: Selection of clones and transformation of yeast
    • Describe the rationale for and perform procedures to transform yeast, including the essential components of a transformation mixture and conditions necessary for transformation.
    • Describe the basic conditions required for cultivating yeast.
    • Describe the rationale for and perform agarose gel electrophoresis of a given size of DNA.
    • Analyze DNA separated by agarose gel electrophoresis, including size estimation.
    • Recognize and describe the qualities of a template for DNA repair that allows efficient DNA repair. 
    Week 7: Phenotyping
    • Design an experiment to determine auxotrophic phenotypes.
    • Predict the outcome of multi-step experiments.
    • Recognize and describe conditions necessary for growth of E. coli and S. cerevisiae.
    • Qualitatively and quantitatively analyze scientific data from scientific experiments, including bacterial and yeast transformation, agarose gel electrophoresis, extraction of plasmid DNA from bacteria, PCR, and auxotroph phenotypic analysis.
    • Communicate science to peers through maintenance of a laboratory notebook, verbal communication with group members, and writing of a formal laboratory report written in a format acceptable for journal publication.
    • Troubleshoot scientific protocols by identifying procedures that are prone to error, comparing recommended protocols to actual procedure, and using positive and negative controls to narrow the location of a potential error.
    • Communicate specific potential or actual uses of CRISPR/Cas9 in science and/or medicine.
    Alignment with Society-Generated Learning Objectives - From Biochemistry and Molecular Biology, and Genetics Learning Frameworks
    • Use various bioinformatics approaches to analyze macromolecular primary sequence and structure.
    • Illustrate how DNA is replicated and genes are transmitted from one generation to the next in multiple types of organisms including bacteria, eukaryotes, viruses, and retroviruses.
    • Define what a genome consists of and how the information in various genes and other sequence classes within each genome are used to store and express genetic information.
    • Explain the meaning of ploidy (haploid, diploid, aneuploid etc.) and how it relates to the number of homologues of each chromosome. 
    • Predict the effects of mutations on the activity, structure, or stability of a protein and design appropriate experiments to assess the effects of mutations.
    • Predict the growth behavior of microbes based on their growth conditions, e.g., temperature, available nutrient, aeration level, etc.
    • Discuss the benefits of specific tools of modern biotechnology that are derived from naturally occurring microbes (e.g. cloning vectors, restriction enzymes, Taq polymerase, etc.)
    • Accurately prepare and use reagents and perform experiments.
    • When presented with an observation, develop a testable and falsifiable hypothesis.
    • When provided with a hypothesis, identify the appropriate experimental observations and controllable variables.