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UVM / Biology / BIOL 011 / What is the meaning of fluid mosaic model?

What is the meaning of fluid mosaic model?

What is the meaning of fluid mosaic model?

Description

School: University of Vermont
Department: Biology
Course: Exploring Biology
Professor: Donald stratton
Term: Fall 2016
Tags: Biology, BCOR, BCOR11, UVM, University of Vermont, stratton, Vermont, and Mitosis
Cost: 50
Name: BCOR11 MIDTERM 10/28 STUDY GUIDE
Description: Completed study guide for the second midterm on 10/28.
Uploaded: 10/25/2016
5 Pages 38 Views 3 Unlocks
Reviews


Exam 2 Review Sheet


What is the meaning of fluid mosaic model?



SOLO

10123116. Membrane Structure ofxn

structure of a cellular membrane - phospholipid snager ingoro philic head, hydrophobic tail) Proteins embedded in a sea of

Tipids

• Fluid Mosaic Model- nonpolar regions of phospholipids & membrane proteins interact to fernd an insoluble barrier. The phospholipid bilayer serves as a lipid "lake" in which a variety


What is the role of cholesterol?



If you want to learn more check out What is the role of employees and unions?

of proteins "float" n a

• Role of Membrane Proteins - Channel proteins allow selective

transport of hydrophilic molec.sichs; carrer proteins can be used We also discuss several other topics like What is meiosis summary?

for active or passive transport

• Role of Cholesterol help to keep the membrane fluid

consistent

• Effect of different kinds of lipids - Cholesterol 3 long chain,


What is the meaning of active transport?



Saturated fatty acids pack tightly together resulting in less fluid membranes u

• Active transport - requires input of metabolic energy be involes. the movement of substances against their []] gradient from

stances against their [] gradients (frown low

[ 1 to high []) If you want to learn more check out What are the products of light reactions?

• Passive Transport - doesn't require direct input of metabolic If you want to learn more check out How do costs change as volume changes?

energy to drive, Occurs when a substance moves from the side of the membrane where its [] is higher to the side where its [] is lower. Mores down its II gradient Diffusion process of random movement toward a state of eglib Osmosis - depends of relative [] of H2O molec, on both sides

al membrane figner total solute [] lower [] of H2O molec

• Huper tonic soln - has higher solute [] than other soln We also discuss several other topics like How do you calculate accounts payable on a balance sheet?
We also discuss several other topics like Why are immediate early genes important?

Hubotonic Soln has lower solute [ ] than other soln istenie Soln- have equal solute []

How Hypertonic Soln affects animal plant cells animal = Shrivered, planta prasmolyzed

• Membrane perme

Study Soun

on Hypotchie soln affects animal / plant cells animal = lysed, plantt turgid (normal) lembrane bermeability - small, nonpolar I decreasing

small uncharged, polar I permeabiing

Targer uncharged, polar Local us. Long Distance signals - local only affect surrounding

Cells, long distance travels through Bloodstream o Tave l ino G- proteins - mobile membrane protein that

is partially inserted in the lipid bilayer & partially inserted exposed on the cytoplaspic surface of the membrane

• Second Messengers - cAMP, Gprotein receptor e Phosphorylation Cascade - sequence of events where one

enzyme phosphorylates another causing a chain ron

leading to the phosphorylation of thousands of proteins 0)

• Protein kinase - anything the adds phosphate greup ladd

neqative charge change Shape of protein) v

• Protein Phosphatase - enzyme that removes a phosphate

group from the phosphorylated amino acid residue of its substrate protein! How are signaling systems turned off ? - remove the ligand, deactivate EDP, deactivate the second messenger, phosphate

removes P. ex-cholera is be G-protein signal stays "on"

• 1st Law of Thermodynamics- energy is neither epeated hor destroyed in chemical rons but only transformed

from one form to another,

• 2nd Law of Thermodynamics- the Universe is proceeding

to a state of max. disorder s

• Endergonic vs. Exergonic Rans: exergonic rans are spontaneaus and release energy, while endergonic )

ons are nonspontanecus and absorb energy s How are rons Coupled? - tie a favorable rxnw an. otherwise unfavorable ran

son of coenzymes

such as NADT

• Oxidized loses eletrons

reduced- gains electrons . Cate bolisme-

sidstion this can be trapped releases E by oxidation, by the reduction of coenzymes such as

involving a sequence of chemical

• Anabolism – the process involving

the sizes molec. from smaller unite rans the constructs or synthesizes mo usually requiring input of energy

6C monosaccharide glucose is converted into 2 36 olysis

molec. of

pyruvete.

pyruvate, Occurs in I f .

glucose

+ (a

.

VADHATPATP

Study SOUD

cytoplasm

ATP

ATP

pyruvate

NADIHTIPATP

energy investment

energy harvest

Study SOUD

phase

-

Citric Acid Cycle- pathway of 8 rans ccompletely oxizes 2 Cacetyl group to 2 molec CO2. Free E is captured by ADP B e carriers NAD+3 FAD, Opperates twice for each glucose molec the enters glycolysis. Occurs in matrix of mitochondria

CO

Ace \ Сод

NADH /

pyruvate

anOSAIC

dy Sour

( OGNADH

+zo

Study Soup

Stud

FADH com

A NADH

• Oxidative phosphorylation - NADH oxidation is used to actively

transport Ht across inner mitochondrial membrane resulting in proton gradient across the membrane. The diffusien of Corotens back across the membrane is then usea to drive

the synthesis of ATP

• Substrate le

results in the to transfer of

Study SOUT

Trate level phosphorylatich metabolic rxh the to in the formation of ATP or GTP by the direct

ster of a phosphoryl group to ADP est GDP from nother phosphorylated compound 1 .

Oo? - bc it pulls through

e-carriers, no n the out comes from.. than respiration - citric acid Cycle & glycolysis. How many ATP can be produced from the complete

oxidation of a molec of glucose? - 36 n ot

• Feedback inhibition in a metabolic pathway - end

Product of the pathway inhibits an earlier step o light runs us. Dark roxas - light rons cecur in presence of

light get energy from that, dark rans get energy from AFPJ

• Why do leaves look green? - bc it is the only color

that isn't absorbect in chrlorophyll e son

• Photosystem I absorbs light El @ 700nm & passes on

excited 'é- to NADP+, reducing it to NADPH. Getsé from water splitting. Occurs in thy lakoid membrane Photo sustem I- abserbs light E @ 680 nm , cxidizes H2O molec.

Binitiates é transport chain the produces ATP. Happens before PSI in thulakoid membrane a n

• Products of alllic & non-cyclic e flow - Cyclic - ATP, no.

INADPH, no O2 l non-Cyclic = ATP, NADPH, O2

• Calvin Cucle - Occurs in Stroma. "Fixes" CO2 into a reduced

form & tums it into carbs, Adds Co2 to RuBP, product is 6C. melec the breaks down into 2 3C molec. Phosphorylation & reduction - product is 63P. Most G3P ends up as BUMP B ATP is used to turn it into RuBP. Bubisco-enzyme that fixes (O2

Exam 2 Review Sheet

SOLO

10123116. Membrane Structure ofxn

structure of a cellular membrane - phospholipid snager ingoro philic head, hydrophobic tail) Proteins embedded in a sea of

Tipids

• Fluid Mosaic Model- nonpolar regions of phospholipids & membrane proteins interact to fernd an insoluble barrier. The phospholipid bilayer serves as a lipid "lake" in which a variety

of proteins "float" n a

• Role of Membrane Proteins - Channel proteins allow selective

transport of hydrophilic molec.sichs; carrer proteins can be used

for active or passive transport

• Role of Cholesterol help to keep the membrane fluid

consistent

• Effect of different kinds of lipids - Cholesterol 3 long chain,

Saturated fatty acids pack tightly together resulting in less fluid membranes u

• Active transport - requires input of metabolic energy be involes. the movement of substances against their []] gradient from

stances against their [] gradients (frown low

[ 1 to high [])

• Passive Transport - doesn't require direct input of metabolic

energy to drive, Occurs when a substance moves from the side of the membrane where its [] is higher to the side where its [] is lower. Mores down its II gradient Diffusion process of random movement toward a state of eglib Osmosis - depends of relative [] of H2O molec, on both sides

al membrane figner total solute [] lower [] of H2O molec

• Huper tonic soln - has higher solute [] than other soln

Hubotonic Soln has lower solute [ ] than other soln istenie Soln- have equal solute []

How Hypertonic Soln affects animal plant cells animal = Shrivered, planta prasmolyzed

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