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A. Explain the term "concentration gradient". Make sure to discuss the difference between a solution's concentration and a concentration gradient.
B. An artificial cell contains 0.03M sucrose and 0.02 M glucose. It is placed into a solution containing 0.01M concentrations each of sucrose, glucose and fructose. The 'cell' membrane is permeable to glucose and fructose, but not sucrose.
1. For which solutes to concentration gradients exist and why?2. Which solutes will exhibit net diffusion into the cell?3. Which solutes will exhibit net diffusion out of the cell?
determine the number of significant figer in the following measurment [ 12.3 ml and 2.3 g and 5.877 micrometer] then round the number 56.877 to the following number of significant figures [4 and 3 and 2]?
Explain the interaction of calcium with other proteins and how this alternate control system affects the rate and duration of smooth muscle contraction.
Did the amplitude of the action potential in median giant axon vary with stimulus voltage? What is the physiological basis for your answer?
A 12-gram mixture of methane, CH4, and ethane, C2H6, is completely combusted in oxygen. If the total mass of CO2 produced is 34.8 grams, what was the approximate mass of the methane in the original mixture?
During the biosynthesis of a protein, which of the following processes occurs to maintain the fidelity sequence? (A) restoration (B) renovation (C) repair (D) remodeling.
Explain why some drugs used to treat type 1 diabetes are compounds that diffuse into the cell and activate tyrosine kinases. Why might they not be as effective in the treatment of type 2 diabetes?
In pea plants flower position, stem length, and seed shape are controlled by independently assorting genes. Each characteristic has the following mode of inheritance.
Where do the simplest plants and animals live.
Examination of a large sample of individuals from the population reveals there is six times as many heterozygote as homozygote recessive individuals in this populaion. What is the frequency of the recessive allele?
In humans the gene for right handedness is dominant to the gene for lefthandedness. A man and a women both heterzygous for this trait to marry. What percent of thier children.
Which of the following occurs as a result of an abundance of tryptophan in E. coli?
Assume that flower color is inherited by simple dominance and that red flowers are dominant to white flowers.
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