Biology Essays Unit 5

Include in your discussion the major reactions, the end products, and energy transfers. The rate of photosynthesis may vary with changes that occur in environmental temperature, wavelength of light, and light intensity.

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Scientists recently have proposed a reorganization of the phylogenetic system of classification to include the domain, a new taxonomic category higher (more inclusive) than the Kingdom category, as shown in the following diagram.

Universal Ancestor Domain Bacteria Domain Archaea Domain Eukarya (Eubacteria) (Archaebacteria) (Eukaryotes) Unit 10 (Vertebrates, Basic Animal Structure and Function) 39.

A portion of specific DNA molecule consists of the following sequence of nucleotide triplets.

TAC GAA CTT GGG TCC This DNA sequence codes for the following short polypeptide.

Describe each classical experiment and indicate how it provided evidence for the chemical nature of the gene. Discuss Mendel’s laws of segregation and independent assortment.

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.Include in your answer (a) a description of how you would set up and perform the experiment: (b) the results you would expect from your experiments: and (c) an explanation of those results based on the principles involved.(Be sure to clearly state the principles addressed in your discussion.) 9. Choose THREE of the following four types of cellular transport.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.methionine – leucine – glutamic acid – proline – arginine Describe the steps in the synthesis of this polypeptide.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. Scientists seeking to determine which molecule is responsible for the transmission of characteristics from one generation to the next knew that the molecule must (1) copy itself precisely, (2) be stable but able to be changed, and (3) be complex enough to determine the organism’s phenotype. 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.Unit 4 (Photosynthesis and Cellular Respiration) 10.Describe the similarities and differences between the biochemical pathways of aerobic respiration and photosynthesis in eukaryotic cells.

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