BIOL-103:Biology in Everyday Life.

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BIOL-103:Biology in Everyday LifeInstructor: Dr. Joelle Nader-NasrFall 2016Name: _________________________Name: _________________________Date :Tuesday 22ndNovember 2016Name: _________________________Name: _________________________Classwork n°4Exercise 1Refer to the illustration below in order to answer the following questions1-What is molecule C?a.Phospholipidb.Integrated proteinc.Cholesterold.Glycoprotein2-What is the role of molecule C?a.Facilitates the diffusion of molecules across the plasma membraneb.Allows cell of the immune system to recognize a cell as native to the bodyc.Works to keep the membrane at optimal fluidityd.Forms the membrane by aggregating as a bilayer3-Which molecule is both hydrophilic and hydrophobic and aggregates as a bilayer to formthe membrane?a.Cb.Dc.Ed.F4-What is molecule E?a.Phospholipidb.Integrated proteinc.Cholesterold.Glycoprotein5-What is the role of molecule E?a.Facilitates the diffusion of molecules across the plasma membraneb.Allows cell of the immune system to recognize a cell as native to the bodyc.Works to keep the membrane at optimal fluidityd.Forms the membrane by aggregating as a bilayer1
Exercise 2Concentration gradient – plasma membrane – rough endoplasmic reticulum – water –organelles – ribosomes – semipermeable –cytosol – Golgi complex1-Osmosis refers to the net movement ofwateracrosssemi permeablemembraneaccording to aconcentration gradient.2-In a eukaryotic cell, the cytoplasm is the region that lies inside theplasma membrane.The jelly-like fluid filling much of this region is calledcytosol, while the individualhighly organized structures within it are calledorganelles.3-Proteins are put together within tiny organelles calledribosomesthat lie outside thenucleus. During their production, these proteins fold up upon entering theroughendoplasmic reticulum, where they undergo editing, after which they move to theGolgi complex, where they undergo further editing and are sorted for distribution.Exercise 3Label the following diagrams______________________________________AMitochondrionANucleusBLysosomeBNucleoplasmCCytoplasmCNucleolusDNuclear envelopeDNuclear poreERough endoplasmic reticulumERough endoplasmic reticulumFSmooth endoplasmic reticulumFMicrotubulesGMicrotubulesGVacuoleHSecretary vesiclesHCytoplasmIRibosomeIStorage vesiclesJGolgi apparatusJCell membrane (coat)2
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