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Title: Review Questions and answers for Cell organelles and Cell membrane
Description: This document provides Questions and answers for review of cell membrane and cell organelles and also gives notes on both topics.
Description: This document provides Questions and answers for review of cell membrane and cell organelles and also gives notes on both topics.
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Cellular Organelles and Cell Membranes
Review questions and notes
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What is the function of golgi complex?
-Maturation and processing of nascent proteins, glycosylation of
proteins, secretion of newly synthesized proteins
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What is the function of endoplasmic reticulum?
-Biosynthesis of proteins, drug metabolism, denaturation of fatty acids
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What is lysozyme?
-It is an enzyme that is present in external secretions
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What is the function of lysozymes?
-They are like bags of hydrolytic enzymes that bring about the
degradation of macromolecules
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Where does protein synthesis takes place?
-On the walls of the endoplasmic reticulum and also in the cytosol
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What are cathepsins?
-They are intracellular proteolytic enzymes particularly found in the
spleen
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What is the most important function of the mitochondria?
-For the generation of ATP
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What are characteristics of the fluid mosaic model?
-Membrane is composed of a lipid bilayer: phospholipids are
arranged in bilayers in a hydrophobic core
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What are the components of membrane that alter its fluidity?
-Cholesterol and unsaturated fatty acids
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What are the different types of transport mechanisms?
-Passive and active transport
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Examples of ion channels
-Ion channels for calcium, potassium and chloride
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valinomyocin, gramicidin
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Important features of active transport
-It requires the use of transporters
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Transport is
generally unidirectional
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Give examples of transport systems
-Sodium pump, Calcium pump
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Another example is the calcium pump
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What is Co-transport?
-If transfer one molecule depends on simultaneous transfer of another
molecule, this system is called a co-transport system
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What is Symport?
-In this transport system, the transporter carries two solutes in the
same direction across the membrane
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Examples of Symport
-Sodium dependent glucose transporter (SGluT)
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Notes
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All body cells contain nucleus except mature
erythrocytes
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Endoplasmic reticulum is a network of interconnecting
membranes where protein synthesis occurs (rough
endoplasmic reticulum)
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Smooth endoplasmic reticulum is the site for complex lipid
and carbohydrate synthesis and detoxification of drugs
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Nascent proteins synthesized in the endoplasmic reticulum
are modified in the golgi complex and then exported to
specific destinations inside the cell
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Title: Review Questions and answers for Cell organelles and Cell membrane
Description: This document provides Questions and answers for review of cell membrane and cell organelles and also gives notes on both topics.
Description: This document provides Questions and answers for review of cell membrane and cell organelles and also gives notes on both topics.