Objectives By the end of this lesson you should be able to: Define the term virus Identify main factors contributing to the spread of viral diseases Identify type of viruses by shape Define the term bacteriophage Differentiate between the lytic and lysogenic cycles of viruses Explain in detail, the molecular mechanisms involving lambda virus’s “decision” […]
Objectives By the end of this lesson you should be able to: Explain the effect of chromatin and DNA chemical modification on gene expression Explain your understanding of epigenetics Describe methods utilized by the eukaryotic cell in the regulation of transcription initiation Describe methods utilized by the eukaryotic cell in the regulation of gene expression […]
Objectives By the end of this lesson you should be able to: What’s An Operon? Metabolic controls generally take place at two levels. The organism can either (1) control enzyme activity, or (2) control enzyme production. Two examples of regulation by the latter is observed in the trp and lac operon. Both mechanisms are utilized […]
Objectives By the end of this lesson you should be able to: Describe steps in DNA transcription and translation Identify the general mechanism by which proteins fold Identify methods of post-translational modification Differentiate between different types of mutation The DNA contains the code for making all proteins. In order for proteins to be synthesized, the […]
Objectives By the end of this lesson you should be able to: Remember that Mendel discovered a “heritable factor” that was responsible for diversity in nature. Unknown to Mendel, this heritable factor is the gene which is a section of DNA. Each human chromosome carries hundreds to thousands of genes, responsible for making various proteins. […]
Objectives By the end of this lesson you should be able to: Describe how Thomas Morgan made the discovery that some genes are X-linked Explain your understanding of Barr body Use your understanding of Barr body to explain how tortoiseshell cats get their color Explain how Thomas Morgan was able to make the conclusion that […]
Objectives By the end of this lesson you should be able to: Who was Gregory Mendel? At this point we have covered the mechanics of mitosis and meiosis. You now obviously know about genes and chromosomes. These biomolecules determine the characteristic phenotypes we inherit from our parents. But, did you know that before the discovery […]
Objectives By the end of this lesson you should be able to: Describe the macrostructure of the chromosome Identify the phases in interphase Identify the phases in mitosis Describe the mechanism of cell division Identify the phase of mitosis illustrated on a microscope slide Explain how cytokinesis in plants and animal cell is different […]
One would be reasonable to think that with so much information stored on the DNA that errors must happen pretty often. However, the DNA is usually very accurate and almost error-free. When errors occur; even small ones, disease may be the result. Here is an outline of what to expect. Autosomal Dominant Disorders Disorders of […]
