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Q1. An individual with condition of myasthenia gravis is faced with an autoimmune disorder in which the body defences attack acteylcholine receptors on muscle cells. What will be the expected effect on calcium levels near contractile proteins, follow arrival of an electrical impulse at those neuromuscular junctions?
Q2. Examine the major stages of sea urchin development with reference to your series of detailed drawings and observational notes. How did the embryonic cells compare in size with the original gamete cells? State reasons such a difference may exist.
There they discover his mitochondria can use only fatty acids and amino acids for respiration, and his cells produce more lactate than normal. Of the following, which is the best description of his condition.
diagram a cross between a male with blood type AB and a female with type AB blood. Give both the genotypic and phenotype ratios for the offspring.
Most cellular activities involve converting energy form one form to another. For each of the following cases, give a biological example and explain the significance of the conversion.
What are transposable elements? Explain two ways they can move and three influences they have had on genome evolution.
Assume your professor handed you a test tube with 3.0 ml of an E.coli culture in it and told you to make a 10^(-3) dilution of the entire culture. Describe how you would do it.
Discuss how would you expect your control tube to look after incubation for gelatinase test? Would it have to be cooled prior its evaluation?
How do cells become differentiated?
Suppose an aqueous cellular protein has a "patch" of mostly hydrophobic residues on one portion of its surface. What simple strategy might the cell adopt to prevent these hydrophobic residues from being exposed to the solvent? Assume that changing..
If the preclinical prevalence of breast cancer increased in the screened population would you expect the positive predictive value to increase, decrease or remain unaltered? Why?
Phenylketonuria, PKU, is a neurodegenerative disorder resulting from inability to metabolize phenylalanine. PKU is inherited as autosomal recessive trait.
Your working at a remote field station and you've been given a container of undentified mostly microscopic. Your job is to determine if the organisms are bacteria, unicellular algae, or protozans.
What is an example of cell adhesion and explain how the various cellular and extracellular molecular components are integrated to make connections that work.
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