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BIO 251 EXAM 2 ACTUAL EXAM WITH COMPLETE QUESTIONS AND COBIO 251 EXAM 2 ACTUAL EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS FROM A VERIFIED SOURCE ALREADY GRADED A+ 100% GUARANTEED TO PASS NEWEST UPDATERRECT DETAILED ANSWERS FROM A VERIFIED S
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BIO 251 EXAM 2 ACTUAL EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS FROM A VERIFIED SOURCE ALREADY GRADED A+ 100% GUARANTEED TO PASS NEWEST UPDATE

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  • October 1, 2024
  • 22
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • bio 251 exam 2
  • bio 251 2
  • bio 251 exam 2 actual exam with complete questions

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  • BIO 251 2

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BIO 251 EXAM 2 ACTUAL EXAM WITH COMPLETE

QUESTIONS AND CORRECT DETAILED ANSWERS FROM A

VERIFIED SOURCE ALREADY GRADED A+ 100%

GUARANTEED TO PASS NEWEST UPDATE




Plasma (cell) membrane - ANSWER-Surrounds cell, defines boundaries• Made of proteins and lipids•




Plasma Membrane structure - ANSWER-phospholipid bilayer with embedded proteins




plasma membrane function - ANSWER-selective permeability- maintains intracellular environment;

controls what comes in and out




Roles of proteins in plasma membrane - ANSWER-Structural Support, transports/Channels, Receptors,

Self Markers




Autophagy - ANSWER-A process in which lysosomes decompose damaged organelles to reuse their

organic monomers

,Peroxisomes - ANSWER-Contain oxidase enzymes that detoxify alcohol, hydrogen peroxide, and other

harmful chemicals




Mitochondria - ANSWER-Powerhouse of the cell, organelle that is the site of ATP (energy) production




Endoplasmic Reticulum (ER) - ANSWER-System of membranous passageways fromthe nuclear

membrane to the the plasma membrane




Granular ER - ANSWER-is also called rough ER.• Has ribosomes embedded on the outer surface•

Functions in protein modification




Agrangular (Smooth ER) - ANSWER-is also called smooth ER.• Has many functions, depending on the

cell• Ca 2+ storage




Cytoplasm - ANSWER-A jellylike fluid inside the cell in which the organelles are suspended




Cytoskeleton - ANSWER-A network of fibers that holds the cell together, helps the cell to keep its shape,

and aids in movement




types of organelles - ANSWER-Ribosomes, Endoplasmic reticulum, Golgi apparatus, Mitochondria,

Lysosome, Centrosome, and Cell extensions




Lysosomes - ANSWER-An organelle containing digestive enzymes

, Golgi Complex - ANSWER-Stacks of flattened sacs(cisternae). Functions- Processes ER products into

final form


Sort and direct finished products to final destinations(intracellular or extracellular)




The Nucleus - ANSWER-Control center of the cell;


Cell's "control center, Largest organelle, Surrounded by double lipid bilayer (nuclearenvelope) linked to

the cytosol by nuclear pores, Chromatin, Nucleolus




Transport across membranes - ANSWER-simple diffusion


osmosis (simple diffusion of water)


facilitated diffusion


active transport


chemical modification transport (Group translocation)-energy requiring process




Diffusion - ANSWER-Movement of molecules from an area of higher concentration to an area of lower

concentration.




Osmosis - ANSWER-Diffusion of water through a selectively permeable membrane




facilitated diffusion - ANSWER-Movement of specific molecules across cell membranes through protein

channels

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