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Q1. The venom of many cobras contains a potent neurotoxin that binds to ligand-gated Na+ channels, causing them to open. Unlike ACh, that binds to and after that rapidly unbinds from ligand-gated Na+ channels, the neurotoxin tends to stay bound to ligand-gated Na+ channels. How does this neurotoxin affect the nervous system's ability to stimulate skeletal muscle contraction? How does it affect the capability of skeletal muscle fibers to respond to stimulation?
Q2. Tay-Sachs disease is caused by loss-of-function mutations in a gene on chromosome 15 that encodes a lysosomal enzyme. It is inherited as an autosomal recessive condition. Among Ashkenazi Jews of Central European ancestry, about 1 in 3600 children is born with the disease. What fraction of individuals in this population are carriers?
Suppose if you could genetically engineer a more efficient system of carbohydrate digestion for the ruminant, what would you try to make the new system accomplish.
How many species can we lose in an ecosystem before we begin to lose important ecosystem services?
Estimate the final guaiacol concentrationg of the following enzyme reaction solutions listed in the table below.
Within a population of plants there are two alleles that code for flower color, red and white. Red is the dominant allele. If there are 300 red flowers and forty-five white flowers,
Coat colors of dogs depend upon the action of at least two genes. At one locus a dominant epistatic inhibitor of coat color pigment (I-) prevents the expression of color alleles at another independently assorting locus.
What is a specific way a healthy respiratory system differs from a diseased one?
Imagine you have a population of 4 individuals. Their genotypes are: AA, AA, Aa, and aa. What is the frequency of allele A? If the frequency of allele A in a population is 0.5, what would you guess is the frequency of the genotype AA? (assuming no..
particular bacterium had two DNA molecules in it, one that was 450 kilobases and one that was 550 kilobases, how would you decide if it had one chromosome and one plasmid, or two chromosomes?
Describe how these two processes are linked between plants and animals based on the reactants and products (water, carbon dioxide, glucose and oxygen) of both pathways.
During exercise, the oxygenation of blood is increased not only by increased alveolar ventilation but also by a greater diffusing capacity of the respiratory membrane for transporting oxygen into the blood. What will happen to the surface area of ..
Can someone give me a detailed explanation of how to do this? Answer is 1:7.5 40.0 µL of solute into 0.260 mL of solvent. What is the final dilution factor.
Which plant division produces naked seed?
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