MASTERING BIO 253 EXAMS: A+ GRADED GUIDE WITH
LATEST QUESTIONS AND ANSWERS.
Cell Structures
-Nucleus: stores DNA, control center
-Mtochondria: "powerhouse" produces energy
-cell membrane: semipermeable barrier
-cytoplasm: gel-like fluid inside the cell
-ER: network of membranes involved in protein
synthesis and lipid production. Ribosomes are attached
-Golgi Apparatus: modifies, sorts and packages proteins from ER
-Ribosomes: small structures attached to the Er
-Lysosomes: contain enzymes that break down waste products
-cytoskeleton: network of protein fibers that provide structural support
Transport process
-Active transport (require ATP) low to high concentration
-Passive transport (no ATP needed) high to low concentration
What are the products of Mitosis?
Two genetically identical daughter cells
facilitated diffusion
process of diffusion in which molecules pass across the membrane through cell membrane channels
from high to low concentration areas using a "protein guard"
Simple diffusion
Movement of molecules from high to low concentration
Osmosis
Diffusion of water through a selectively permeable membrane from a high concentration area to low
concentration. passive
Exocytosis
release of substances out a cell by the fusion of a vesicle with the membrane. ATP
Endocytosis
A process in which a cell engulfs extracellular material through an inward folding of its plasma
membrane. ATP
Phagocytosis
A type of endocytosis in which a cell engulfs large particles or whole cells (cell eating) uses ATP
LATEST QUESTIONS AND ANSWERS.
Cell Structures
-Nucleus: stores DNA, control center
-Mtochondria: "powerhouse" produces energy
-cell membrane: semipermeable barrier
-cytoplasm: gel-like fluid inside the cell
-ER: network of membranes involved in protein
synthesis and lipid production. Ribosomes are attached
-Golgi Apparatus: modifies, sorts and packages proteins from ER
-Ribosomes: small structures attached to the Er
-Lysosomes: contain enzymes that break down waste products
-cytoskeleton: network of protein fibers that provide structural support
Transport process
-Active transport (require ATP) low to high concentration
-Passive transport (no ATP needed) high to low concentration
What are the products of Mitosis?
Two genetically identical daughter cells
facilitated diffusion
process of diffusion in which molecules pass across the membrane through cell membrane channels
from high to low concentration areas using a "protein guard"
Simple diffusion
Movement of molecules from high to low concentration
Osmosis
Diffusion of water through a selectively permeable membrane from a high concentration area to low
concentration. passive
Exocytosis
release of substances out a cell by the fusion of a vesicle with the membrane. ATP
Endocytosis
A process in which a cell engulfs extracellular material through an inward folding of its plasma
membrane. ATP
Phagocytosis
A type of endocytosis in which a cell engulfs large particles or whole cells (cell eating) uses ATP
