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Q1. The neurotransmitter acetylcholine is made in the cytosol and then transferred into synaptic vesicles, where its concentration is more than 100 fold higher than in the cytosol. Synaptic vesicles isolated from neurons can take up additional acetylcholine if it is added to solution in which they are suspended but only in the presence of ATP. Na+ ions are not required for acetylcholine uptake, but raising the pH of the solution in which the synaptic vesicles are suspended increases acetylcholine uptake. In addition, transport is inhibited consistent with all these observations. Propose a mechanism that is consistent with all these observations.
Q2. In winter, plants exchange the saturated lipids in their membranes for unsaturated lipids. Unsaturated lipids are "bent" and keep the membranes more fluid since they cannot be stacked closely together. Of what benefit would this be for herbaceous plants that live through the winter?
Describe how body combats an invading bactrum. Address both specific and nonspecific immunity and the cells that are involved in each process. Once that is done cross the alveolar membrane and trace your route out of the body through the nose.
Human population doesn't follow a j-shaped curve since humans are able to consciously limit the number of offspring that they produce, which is what usually happens after a population industrializes.
The following Punnett square shows the inheritance of the sickle cell and SRY genes, with X representing the X chromosome with no SRY gene and Y representative the Y chromosome which does have an SRY gene. Complete the Punnett square.
Determine the percentage of offspring displaying each trait. If a single, diploid G2 nucleus in an ascus contains 400 nanograms (ng) of DNA, after that a single ascospore nucleus of this species should contain how much DNA (ng), carried on how many c..
Tina is consuming 12 mg of iron per day. Her RDA is 15 mg. She has no condition warranting a greater-than-normal need for iron. Which of the statements is true about her consumption of this nutrient.
What does this tell you about the physiological importance of hemoglobin's sigmoidal oxygenbinding curve. Which line represents the bag with the maximum initial concentration of sucrose.
When such a drug is added, what will occur to ATP synthesis and oxygen consumption, if rates of glycolysis and the citric acid cycle stay the similar.
The Verhulst's logistic model has been practical to the natural growth of the halibut population in certain areas of the Pacific Ocean. Let NN, measured in kg, be the total mass (or biomass) of the halibut population at time tt.
Examine the nature of water and how its unique chemical properties impact water regulations in plants. Elucidate the structure and function of the leaf to water regulation.
Organize the genotype in the table, define the origin (parental, single cross-over progeny and double-crossover progeny) and find out the order of the genes on the chromosome.
Based on what you already know about photosynthesis, develop the testable hypothesis to elucidate the influence of an increase in light intensity on the photosynthetic rate in tomato leaves.
Plan a scientific experiment to find out the effect of this environmental factor on the rate of photosynthesis or cellular respiration in your chosen organism (reviews the scientific method, remember hypothesis, control so on.
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