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Water is crucial for life as we know it. One of the most important characteristics of water is its ability to act as a solvent. Explain why water is such a good solvent for polar and charged molecules.
Somatic cells of chimpanzees contain 48 chromosomes. How many chromatids and chromosomes are present in (h) an oogonial cell prior to S-phase (i) a spermatid (j) a primary oocyte arrested prior to ovulation (k) a secondary oocyte arrested prior to..
A cross is made between 2 E. coli strains: Hfr arg+ bio+ leu+ (x) F- arg- bio- leu-. Interuppted mating studies show that arg+ enteres the recipient last, so arg+ recombinants are selected on a medium containing bio and leu only.
When the experiment is repeated with a protein medium, the yeasts grow only in the presence of oxygen. Pasteur concluded that the yeasts can take oxygen from air, and in the absence of air, the yeasts take oxygen from sugar.
Which of the following is NOT true regarding the structure of cellular membranes?
Briefly compare similarties in the release of the contents of cortical granules during the fertilization of the sea urchin ovum, with the release of neurotransmitters from terminal knobs of a stimulated neuron.
What is the process of movement of carbon dioxide from, for example, your toe to outside the body? What organs, arteries and veins does it pass through?
Three pairs of genes with two alleles each (A1 and A2 , B1 and B2 , and C1 and C2 ) control the height of a plant. Suppose that the 1 allele is dominant in each case and the 2 allele is recessive.
A batch animal cell culture has a productivity of 1.8 g/L*day, with a MUmax=0.5 days, a 10% inoculums and a turnaround time of 5 hours. If a continuous culture could operate at a dilution rate of 90% MUmax, explain what would be the productivity.
Explain an experiment that would differentiate between simple diffusion and facilitated diffusion of glucose across the cell membrane of a new strain of bacteria.
Use Punnett squares to illustrate whether a type A female and a type B male can have a child with type O blood.
Discuss the purpose of the immune system is to recognize foreign bodies and respond with the production of immune cells and proteins.
In the motility test, why is it essential that the reduced TTC be insoluble? Why is there less concern about the solubility of the oxidized form of TTC?
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