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Biology in Everyday Life: Cell Structure and Function
Added on -2019-09-20
This article covers topics related to cell structure and function such as the structure of plasma membrane, molecules forming it, and their functions, five categories of proteins commonly found in plasma membranes and their functions, the function of ribosomes, and more. It also includes solved assignments, essays, and dissertations on the subject.
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BIOL-103:Biology in Everyday LifeInstructor: Dr. Joelle Nader-NasrFall 2016Name: _________________________Name: _________________________Date :Tuesday 22nd November 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 form the 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 of water across semi permeable membrane according to a concentration gradient.2-In a eukaryotic cell, the cytoplasm is the region that lies inside the plasma membrane.The jelly-like fluid filling much of this region is called cytosol, while the individualhighly organized structures within it are called organelles.3-Proteins are put together within tiny organelles called ribosomes that lie outside thenucleus. During their production, these proteins fold up upon entering the roughendoplasmic 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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