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Penicillin is an irreversible inhibitor of the transpeptidases, enzymes that cross-link components of the bacterial cell wall. The cell wall is thus fragile and the bacteria die. Penicillin and its derivatives are structural analogs of the natural substrates of these enzymes. Why doesn't penicillin normally kill humans, unless a severe allergic reaction (anaphylaxis) develops? How does penicillin inhibit transpeptidase (what kind of inhibitor is it)?
The dominant bonds holding together non-polar compounds that are immersed in aqueous solution are, and the forces that hold pure solutions of non-polar compounds are
Select a fossil fuel. How is this fossil fuel used? What are the adverse effects on the environment? Pretroleum for electric energy Select a local or regional alternative energy resource. How might this resource be used to supplement or replace foss..
An enzyme and its substrate are combined in a test tube but no product is formed. Another molecule is added to the tube, and now the product is formed at the normal rate. Give 2 reasons.what type of inhibition is working on the substrate.
Which of the following events depends on the hydrophobicity in primary structure of a protein?
diagram and describe how countercurrent exchange mechanism work use specify examples for 1. gas exchange 2.thermoregulation 3. osmoregulation and 4. reducing the evaporative water lose when breathing ( 1 example for each)
Determine what features distinguish association cortices from sensory and motor cortices? Consider thalamic input and corticocortical connections.
Draw the response of the post-synaptic cell to three stimuli of different intensity (gentle, medium, and intense). Be sure to label all axes.
Wild-type fruit flies have brick-red eyes. A pure-breeding strain of wild-type flies was crossed with a pure-breeding strain with white eyes.
Discuss and explain mechanistically the multiple steps involved in multi-step tumorigenesis. Make sure to give specific examples using a specific cancer, and make sure to tie all of steps together in the end.
Which is/are true of meiosis?
Explain how promoter function was measured in the article "genetic analysis of the TBX1 gene promoter in ventricular septal defects" by Haihua wang, Dongfeng Chen, Liming Ma, Haihong Meng, Yumei Liu, Wne Xie, Shuchao Pang, and Bo Yan.
Discuss the differences and similarities between bacteria and fungi. Include a comparison of size, cell type, reproduction, mode of deriving food, and good versus bad effects on other organisms and the environment. Be sure to give specific example..
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