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Q1. Human babies and hibernating or cold-adapted animals are able to maintain body temperature (a process called thermogenesis) due to the presence of brown fat. Brown fat has a high concentration of mitochondria. The mitochondria in them have a protein called thermogenin, which allows the flow of hydrogen ions through an inner mitochondrial membrane (bypassing the ATP synthase). Based on this and your understanding of cellular respiration, propose a mechanism by which brown fat helps keep animals warm.
Q2. Animal cells are permeable to water and urea but NOT to sucrose. At first, inside of a cell contains 1 M sucrose and 1 M urea and the outside 1 M sucrose and 2 M urea. After system reaches equilibrium, what changes are observed?
Galton, a geneticist of the pre-Mendelian era, devised the principle that half of our genetic makeup is derived from each parent
Discuss how would the pH and dissolved oxygen change over the course of a day (morning, noon, and night)? Over the course of a year? What is driving these changes?
How do axons develop and form connections within the brain? What difference exist between synapse formation in the CNS and in neuromuscular junctions?
You are a CDC (Center for Disease Control) researcher studying malaria. Your goal is to understand the evolution of malaria in order to be able to possibly predict where a future outbreak may be.
In the dihybrid cross shown below, genes A and B are linked with 10map units between them. A is completely dominant to a, and B is completely dominant to b, the phenotypic ratio
How do materials enter and exit the nucleus? What are participating proteins?
How many ATP molecules can be obtained from one molecule of butterfat containing 1 glycerol and three 12-carbon chains?
Hill buffer is a solution of 0.4 M K2HPO4 made up in 0.08M KCl. We needed 2500 mL for the week. Show your work. a.) How many grams of KCl (FW = 74.551) were needed to make this volume of buffer? b.) How many grams of K2HPO4 (FW = 174.17) were need..
In humans, male pattern baldness is due to an autosomal locus where bald is dominant in males and recessive in females.
Give an example of two missense mutations in the sequence listed here ( AUG CCG AAG UCA UAA). one example that is likely to cause a dramatic change in function, and one that is likely to give a normal phenotype.
A mole of an assured compound contains 207.7 g of lead and 32.00g of oxygen. Without doing any calculations, tell whether a formula Unit of a compound contains more atoms of lead or more atoms of oxygen. Explain in details.
in the methylene blue reductase test what results would you expect if the tubes were inoculated with a strict aerobe? a strict anaerobe?
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