CK-12 Foundation
Ck 12: Electron Transport
[Free Registration/Login may be required to access all resource tools.] Discover how a mitochondrial electron transport chain works. This tutorial helps students identify the products of the Krebs cycle, describe a chemiosmotic gradient,...
CK-12 Foundation
Ck 12: Plant Cell Structures
[Free Registration/Login may be required to access all resource tools.] Exercise provides an overview of special structures found in plant cells. It explains the function of the cell wall, explores the role of the central vacuole, and...
CK-12 Foundation
Ck 12: Light Reactions of Photosynthesis
[Free Registration/Login may be required to access all resource tools.] The first stage of photosynthesis, light reactions, is summarized. The steps are listed, photolysis and the role of ATP synthase is explained, and how the energy of...
CK-12 Foundation
Ck 12: Calvin Cycle
[Free Registration/Login may be required to access all resource tools.] The second stage of photosynthesis, the Calvin Cycle, is described. Students will learn how to write the overall photosynthesis equation, explain RuBisCo, describe...
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Ck 12: Dna and Chromosomes
[Free Registration/Login may be required to access all resource tools.] Tutorial serves as an introduction to chromosomes. It defines genes, chromosomes, and homologous chromosomes, while providing an explaination of chromatids and...
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Ck 12: Cell Division in Prokaryotes and Eukaryotes
[Free Registration/Login may be required to access all resource tools.] No matter what the cell, all cells come from preexisting cells through the process of cell division. This module provides an overview of cell division in prokaryotes...
CK-12 Foundation
Ck 12: Cell Cycle and Cancer
[Free Registration/Login may be required to access all resource tools.] Cell division is just one of several stages that a cell goes through during its lifetime. Students will learn about the phases of the cell cycle, specifically the...
CK-12 Foundation
Ck 12: Cell Cycle, Mitosis and Cytokinesis
[Free Registration/Login may be required to access all resource tools.] A description of the stages of eukaryotic cell division, a summarization of mitosis and the metaphase plate, an explanation of the function of the centrioles and the...
CK-12 Foundation
Ck 12: Meiosis
[Free Registration/Login may be required to access all resource tools.] How do you make a cell with half the DNA? Meiosis. This activity outlines the phases of meiosis, provides an overview of sexual reproduction, and describe how...
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Ck 12: Gametogenesis, Advance
[Free Registration/Login may be required to access all resource tools.] Did you know the ostrich egg is just one cell? Tutorial describes the process of gametogenesis. and also compares and contrasts spermatogenesis and oogenesis.
CK-12 Foundation
Ck 12: Genetic Variation in Organisms
Genetic variation helps ensure the survival of a species. It is this variation that is the essence of evolution. Without genetic differences among individuals, "survival of the fittest" would not be likely. This activity discusses how...
CK-12 Foundation
Ck 12: Central Dogma of Molecular Biology
[Free Registration/Login may be required to access all resource tools.] This module states and explains the central dogma of molecular biology which was conceived by Francis Crick.
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Ck 12: Dna, the Genetic Material
[Free Registration/Login may be required to access all resource tools.] DNA is the genetic material in your cells passed on to you from your parents and determines your characteristics. Learn about transformation and how DNA was...
CK-12 Foundation
Ck 12: Dna Structure and Replication
[Free Registration/Login may be required to access all resource tools.] Module describes how DNA's structure and function was discovered while summarizing the process of DNA replication. This activity also explains Chargaff's rules and...
CK-12 Foundation
Ck 12: Rna
[Free Registration/Login may be required to access all resource tools.] An overview of RNA, its three main types and their functions are discussed in this tutorial. After completing this activity, students will be able to compare DNA to...
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Ck 12: Transcription of Dna to Rna
[Free Registration/Login may be required to access all resource tools.] The process of transcription is defined and discussed in protein synthesis. Students will learn about mRNA processing and know the significance of polyadenylation.
CK-12 Foundation
Ck 12: Genetic Code
[Free Registration/Login may be required to access all resource tools.] How do you go from four letters to 20 amino acids? You need a code. This module introduces the genetic code and how to read it, defines codon and reading frame, and...
CK-12 Foundation
Ck 12: Translation
[Free Registration/Login may be required to access all resource tools.] Translation involves translating the language of nucleotides to the language of amino acids. During this activity, translation in protein synthesis is explored along...
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Ck 12: Types of Mutation
[Free Registration/Login may be required to access all resource tools.] Everyone has mutations. Mutations are essential for evolution to occur. This tutorial defines mutations and explains the different types: somatic mutations, germline...
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Ck 12: Causes of Mutation
[Free Registration/Login may be required to access all resource tools.] Learning activity defines mutagen, covers the causes of mutation, and gives examples of spontaneous mutations.
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Ck 12: Mutation Effects
[Free Registration/Login may be required to access all resource tools.] Effects of mutations can be beneficial or they can be harmful. This tutorial describes the effects and provides examples of each.
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Ck 12: Gene Expression and Regulatory Proteins
[Free Registration/Login may be required to access all resource tools.] Gene expression is the use of a gene whose product is necessary for that moment. Whenever a particular protein is needed, gene expression provides it. This module...
CK-12 Foundation
Ck 12: Gene Regulation in Prokaryotes
[Free Registration/Login may be required to access all resource tools.] Provides an overview of gene regulation in prokaryotic cells while defining operon, explaining the roles of the operator, the promoter, and the repressor, and...
CK-12 Foundation
Ck 12: Gene Regulation in Eukaryotes
[Free Registration/Login may be required to access all resource tools.] Gene regulation in eukaryotic cells is described along with the role of the TATA box and homeobox genes.