The reaction below is catalyzed by the enzyme fumarase. L-Malate -> Fumarate + H2O. The rate is thought to be a function of the ionization state of amino acid functional groups at the active site. Explain how functional groups at the active site of an enzyme may result in a variety of activity with pH.
For each of the anatomical or biochemical attributes listed below, indicate which are true of both C4 and CAM plants. Can perform photosynthesis without RUBISCO. PEP carboxylase generates a 4-carbon molecule that is stored until such times as the light reaction and the Calvin cycle can begin. Before being added to ribulose bisphosphate (RuBP), atmospheric […]
Draw a diagram illustrating how Angiotensin II regulates the contraction of smooth muscle cells in blood vessels. Begin the diagram with a ligand binding to a receptor, and end the diagram with an illustration of how signaling molecules cause changes in myosin-actin interactions. Include a written explanation describing each step in your diagram. Ensure that […]
Which of the following statements about cells involved in acute inflammation is FALSE? Select one: a. Mast cells contain prominent cytoplasmic granules and are found at mucosal surfaces O b. Neutrophils contain cytoplasmic granules and phagocytose bacteria. O c. Macrophages have a larger, pale, oval nucleus with abundant cytoplasm O d. Lymphocytes have a round, […]
In various biotechnology applications, double-stranded DNA is often denatured (separated) into single strands by heating to near-boiling temperatures. Looking at the two types of base pairs (Figure 3.9 in your book), would A-T-rich sequences or G-C-rich sequences denature more readily?
Describe the general steps for identification of clinical species by culture, including the practice of direct smear, a battery of initial plates, followed by biochemical testing of potential pathogens, and antimicrobic susceptibility tests. Include the purpose of each step
What are the four statistical approaches for phylogenetic reconstruction we discussed in class? Which of them attempt to recapitulate actual evolutionary events? Which would you use to determine the phylogeny of 35 species of rotifer? Please Explain why! The four statistical approaches for phylogenetic reconstructions are “Distance, Maximum Parsimony, Maximum Likelihood & Bayesian”
Which of the following will cause an increased risk of thrombosis? Select one: O a. Reduction in the amount of antithrombin III in. circulation. O b. An increase in the amount of plasmin in the circulation i O c. Nitric oxide production by endothelial cells O d. Prostaglandin PGI2 production by endothelial cells. e. High […]
Bacteria can generate energy using a variety of different electron transport chain components depending on the environment. a. (3 pts) During what environmental change would a bacterium shift its metabolism from aerobic lithotripsy to aerobic organography? b. (4 pts) Which component of the electron transport chain would change under the environmental conditions of 5a? Why?
Review questions: Name the uses of phenol in Dentistry. What is the phenol coefficient? Another method of microbial control is filtration. List down at least 5 kinds of filters that could be used for this method. Define the following terms: Antiseptic Asepsis Disinfectant Sterilization Bactericidal Bacteriostatic
