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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Why do the cell membranes of microbes living in Arctic water likely contain more unsaturated fatty acids than do membranes of microbes living in hot springs?
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- pls answer the following questionarrow_forwardAlthough the first two carbons of fructose and glucose are identical in structure to DHAP and GADP (from glycolysis), DHAP and GADP equilibriate on their in solution to favor the ketone over the aldehyde, while fructose and glucose do not. Why? a)The larger size of the molecule sterically hinders the isomerization b)The larger sugars have more OH groups which hydrogen bond and disrupt isomerization c)The larger sugars cyclize, and there is no carbonyl to isomerize in the cyclic form d)The larger sugars cyclize, and in the cyclic form the hydrogen bonding is very strong e)The larger sugars are less soluble in water than the smaller sugarsarrow_forwardThe lipid shown here is produced by certain microorganisms that live in extremely warm environments, such as hot springs. Assuming that this lipid makes up a portion of the organism’s membrane lipids, would the organisms produce more of this lipid or less of this lipid as the temperature increased from 45°C to 65°C?arrow_forward
- Bears, and other animals that hibernate, eat large amounts of food during the summer to store energy for the winter. What macromolecule stores this energy? What is the advantage of storing energy in this molecule?arrow_forwardLipid bilayers form spontaneously in a process driven by the hydrophobic effect. Explain how the hydrophobic effect drives bilayer formation from individual lipids in an aqueous environment. Describe how the physical properties of the lipid bilayer are determined by the chemical properties of the membrane lipid components. Diagrams are encouraged for both parts of the question.arrow_forwardDescribe three types of the amphipathic lipid aggregates that form in water.arrow_forward
- Why do lipids form bilayer membranes rather than dissolve? Consider Thermodynamics and structural effectsarrow_forwarda) what happens if an enzyme is not made correctly? b) what is the function of the major RNA is it proteins synthesis? c) what is the primary source of all glucose, and why is it such an important monosaccharide?You need to include its molecular formula. d) when you react ammonia with a halogenated alkane will you get only one organic product? Why or why not? (do not talk about inorganic products) e) emulsifiers are pretty important compounds for daily life, externally and internally to us humans. Describes the two parts of an emulsifier molecule, and how most emulsifiers work and what they actually do. f) consider the ring structure of B-D glucose. it will give a positive test as a reducing sugar. Describe how that can happen in a pH=7 solution such as fehlings'?arrow_forwardWhat advantage do unsaturated phospholipids have over saturated phospholipids in the lipid bilayer?arrow_forward
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