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Simple (Passive) DiffusionDescribe the direction of transport relative to theconcentration gradient:Molecules move down a concentration gradient. They movefrom region of higher concentration to one of lower concentrationbecause of random thermal agitation.Describe where the energy for transport comes from:No metabolic energy input is required.Describe IF and HOW membrane proteins participate:No membrane proteins are used for this transport.Discuss whether or not this type of transport offers the cellspecificity. i.e., can the cell regulate what goes in andout?:Does not regulate the cell specificity.Facilitate DiffusionDescribe the direction of transport relative to theconcentration gradient:Molecules move down a concentration gradient. They movefrom region of higher concentration to one of lowerconcentration.Describe where the energy for transport comes from:No metabolic energy input is required.Describe IF and HOW membrane proteins participate:Uses carrier molecules (permeases) by attachment.Discuss whether or not this type of transport offers the cellspecificity. i.e., can the cell regulate what goes in andout?:The membrane carrier can change conformation after binding onexternal molecule and subsequently release the molecule on the cellinterior.Primary Active TransportDescribe the direction of transport relative to theconcentration gradient:Movement of ions or molecules across a cellular membrane from alower to a higher concentration.Describe where the energy for transport comes from:ATP, sunlight, etc.Describe IF and HOW membrane proteins participate:Involves carrier proteins (permeases) by attachment.Discuss whether or not this type of transport offers the cellspecificity. i.e., can the cell regulate what goes in andout?:Concentrates molecules inside the cell.Secondary Active TransportDescribe the direction of transport relative to theconcentration gradient:Molecules move against the gradient. They move from low tohigh concentration.Describe where the energy for transport comes from:ATP, sunlight, etc.Describe IF and HOW membrane proteins participate:Attaches to a carrier protein.Discuss whether or not this type of transport offers the cellspecificity. i.e., can the cell regulate what goes in andout?:Concentrates molecules inside the cell.
The extent of branching (number of α1→6 glycosidic bonds) in amylopectin can be determined by extensive methylation followed by identification of the hydrolysis products of the methylated polysaccharide, as follows:
What is the total number of noncovalent bonds joining the nucleotides of the complementary strands?
write a 200- to 350-word script for a radio ad that promotes a healthy musculoskeletal system in old age. address the
Which kind of bond gives water its many unique qualities?
q1. whilst playing lacrosse frank took a blow to the back of his neck. this caused swelling of the posterior spinal
q1. the pressure reading over the brachial artery is a very close representation of the true blood pressure however
Why doesn't flu shots,or any other vaccination, provide protection to a person forever. Why are additional shots needed?
How do I determine whether a functional group is hydrophobic or phillic?
For several years the benefits of routine use of female hormone supplements by postmenopausal women have been debated.
The question is to detemine whether B-galactosidase is expressed under specified situations. The answer indictes that the B-galactosidase is expressed whether lactose is present or not.
Assume you have made a collection of mutant fruit flies that aredefective in several aspects of DNA repair. You test each mutantfor its hypersensitivity to 3-DNA damaging agents.
Glycogen is a polymer, so it has more energy than an equivalent number of glucose molecules. How does the cell find the energy necessary to make this storage product?
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