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Both photosynthesis and aerobic cellular respiration are examples of complex metaoblic pathways, consisting of many chemical reactions that require enzymes to function. Explain two attributes of enzymes in catalyzing chemical reactions and in metabolic pathways.
Explain in detail why different cell types might or or not respond to a certain signaling molecule; and, why some cells respond to the same signal but with different outcomes. Give and explain specific examples.
Consider a genetic disorder in which healthy allele mutates to a recessive deleterious one with a rate of 10^-8, and the fitness cost is a reduction of the fitness by 25%.
A strain of E. coli contains a mutant tRNALeu. Instead of recognizing the codon 5' CUG 3', as it does in nonmutant cells, the mutant tRNA recognizes the codon 5'GUG3'. A missense mutation of another gene, bug, affecting amino acid number 28 of the..
Describe the general role of miRNAs in gene expression in eukaryotes. In addition, describe how this RNAi system might be utilized by scientists for studying protein function or by clinicians for treating disease.
Explain why protein folding can be favorable in aqueous solution using non-covalent interactions and the laws of thermodynamics.
Suppose when increasing magnification from high dry to oil immersion, should the iris diaphragm be open or closed? How is this done?
Nucleus, Mitochondria, How do receptors interact with hormones? How do the hormones interact with each Other? How do the secondary messengers work Again? Hormone binds to G protein what is the Hypothalamus.
Which of the following cells store the highest glucose concentration? The level of exercise that increases body's core temperatureto 39 C. The peptide bond associated with lysine can be broken by
In counting a suspension of bacteria in a hemocytometer, you count 149 bacteria in one of the unit cells (e.g., 1 mm x 1 mm 1 0.1 mm). What is the concentration of bacteria in the suspension (to two significant digits)? [enter your anser in scient..
Genes are necessary part of cells. However, much of our genome is composed of "junk DNA," and things that just do not work. One gene that does not work in humans is the LGGLO gene.
What diseases are lethal if the individual inherited homozygous alleles but are evolutionary advantageous when the individual inherit heterozygous allele.
An uncatalyzed reaction has a rate of 4.2 x 10-7 sec-1. When an enzyme is added the rate is 3.2 x 104 sec-1. Calculate the rate enhancement caused by the enzyme.
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