What are biogeochemical cycles?
Account for the differences in oxygen consumption observed between: Explain why each of these features is necessary. State the conclusions reached by Mendel in his work on the inheritance of characteristics. Explain how each of the following deviates from these conclusions. Experiments by the following scientists provided critical information concerning DNA.
Describe each classical experiment and indicate how it provided evidence for the chemical nature of the gene.
Explain how the events of meiosis I account for the observations that led Mendel to formulate these laws. An organism is heterozygous at two genetic loci on different chromosomes. Explain how these alleles are transmitted by the process of mitosis to daughter cells.
Explain how these alleles are distributed by the process of meiosis to gametes. Labeled diagrams that are explained in your answer may be useful. A portion of specific DNA molecule consists of the following sequence of nucleotide triplets.
What would be the effect of a deletion or an addition in one of the DNA nucleotides? What would be the effects of a substitution in one of the nucleotides? Describe the operon hypothesis and discuss how it explains the control of messenger RNA production and the regulation of protein synthesis in bacterial cells.
Explain how DNA meets each of the three criteria stated above. Select one of the criteria stated above and describe experimental evidence used to determine that DNA is the hereditary material.
Describe the biochemical composition, structure, and replication of DNA. Discuss how recombinant DNA techniques may be used to correct a point mutation. Describe the production and processing of a protein that will be exported from a eukaryotic cell.
Begin with the separation of the messenger RNA from the DNA template and end with the release of the protein at the plasma membrane.
Describe the steps of protein synthesis, beginning with the attachment of a messenger RNA molecule to the small subunit of a ribosome and ending generalized with the release of the polypeptide from the ribosome. Include in your answer a discussion of how the different types of RNA function in this process.
The diagram below shows a segment of DNA with a total length of 4, base pairs. The arrows indicate reaction sites for two restriction enzymes enzyme X and enzyme Y. Explain how the principles of gel electrophoresis allow for the separation of DNA fragments.
Describe the results you would expect from the electrophoresis separation of fragments from the following treatments of the DNA segment above.
Assume that the digestions occurred under appropriate conditions and went to completion. The mechanism of action of restriction enzymes. The different results you would expect if a mutation occurred at the recognition site for enzyme Y. By using the techniques of genetic engineering, scientists are able to modify genetic materials so that a particular gene of interest from one cell can be incorporated into a different cell.
Describe a procedure by which this can be done.Directory Search - Northern Arizona University If you prefer a more streamlined search experience, please choose MOBILE SITE Skip navigation and go to main content (Press Enter). Michael Tobis, editor-in-chief of Planet and site cofounder, has always been interested in the interface between science and public policy.
Describe the biogeochemical cycles of carbon and nitrogen. Trace these elements from the point of their release from a decaying animal to their incorporation into a living animal.
Carbon in Earth's atmosphere consists mainly in the forms of carbon dioxide and methane. ASSISTED COLONIZATION is the intentional movement and release of an organism outside its indigenous range to avoid extinction of populations of the focal species..
ECOLOGICAL REPLACEMENT is the intentional movement and release of an organism outside its indigenous range to perform a specific ecological function..
See the 3-fold chart immediately below for distinctions between three forms of. Nitrogen, Carbon and Phosphorus Cycles Essay Words | 4 Pages. Nitrogen, Carbon and Phosphorus Cycles The carbon cycle deals with the interaction of carbon between living organisms and the nonliving environment.
This cycle is a process through which all carbon rotates. The main result of the carbon cycle is to serve as a great natural . This research will begin with the statement that a biogeochemical cycle is a cyclical pathway through which all nutrients stream into the living components from the nonliving and then back to them.