With this problem set, students will learn about the solvent properties of water, pH, pKa, and buffering capacity. For each problem there is a tutorial feature that will explain the science behind the problem.

In this interactive activity, students will learn the concepts and techniques behind DNA profiling and how to interpret DNA autoradiograms and evaluate DNA profiles to determine familial relationships.

In this interactive activity, students will learn the concepts and techniques behind DNA profiling of the 13 core CODIS "Short Tandem Repeat" loci used for the national DNA databank.

This exercise from The Biology Project contains a series of multiple choice questions about the
proteins, carbohydrates, and lipids that comprise cell membranes. Included with the questions
are tutorial readings to explain the answers. Students will learn that membranes are fluid,
allow cells to communicate with each other and their environment, that membranes are important for regulating ion and molecular traffic flow between cells, and that defects in membrane components lead to many significant diseases.

In this exercise, students review information about how color blindness is inherited and complete several problem solving exercises applying their knowledge.

The purpose of this problem set is to present an introduction to the use of the Restriction Fragment Length Polymorphism (RFLP) method to characterize human DNA samples as applied in paternity analysis and sex crimes investigations. For each problem there is a tutorial feature that will explain the science behind the problem.

With this problem set, students can assess their understanding of the dihybrid cross. For each problem there is a tutorial feature that will explain the science behind the problem.

With this problem set, students will become more familiar with some key principles about enzymes, catalysis, and energy that are central to a subsequent study of metabolic pathways. For each problem there is a tutorial feature that will explain the science behind the problem.

In this exercise, students complete a simulation of human karyotyping using digital images of chromosomes from actual human genetic studies. They will arrange chromosomes into a completed karyotype, and interpret their findings just as if they were working in a genetic analysis program at a hospital or clinic.

With this problem set, students can assess their understanding of the monohybrid cross. For each problem there is a tutorial feature that will explain the science behind the problem.

In this virtual activity, students examine cells in the tip of an onion root (digitized photographs) to better understand mitosis and to determine the time spent in different phases of the cell cycle.

This exercise from The Biology Project introduces students to the kinds of cells that make up
all living systems, and to contrast cells with viruses. Students will be able to name the six
kingdoms, understand the differences between prokaryotes and eukaryotes, and be able to describe
the basic functions of the eukaryotic cell organelles. It includes tutorial readings and multiple choice questions to test students' knowledge.

With this problem set, students can assess their understanding of sex-linked inheritance. For each problem there is a tutorial feature that will explain the science behind the problem.