BIOS 255 EXAM 2 CERTIFICATION EVALUATION QUESTIONS AND SOLUTIONS FULL REVIEW SHEET

BIOS 255 EXAM 2 CERTIFICATION
EVALUATION QUESTIONS AND SOLUTIONS
FULL REVIEW SHEET

●● what are the 3 main parts of the cell
Answer: cell membrane, cyoplasm, nucleus


●● what can be found in the cytoplasm
Answer: cytosol and organelles


●● what can be found in the nucleus
Answer: chromosomes, genes, and nucleolus


●● how does the cell membrane allow things to go in and out of the cell
Answer: selectively permeable


●● what is the cell membrane composed of
Answer: phospholipid bilayer


●● in the phospholipid bilayer, is the head hydrophobic or hydrophilic
Answer: hydrophilic

,●● in the phospholipid bilayer, is the tail hydrophobic or hydrophilic
Answer: hydrophobic


●● what does the cell membrane bilayer consist of
Answer: phospholipids, cholesterol, glycolipids


●● what are the 2 main types of membrane proteins
Answer: transmembrane proteins and peripheral proteins


●● what are transmembrane proteins
Answer: proteins passing through the membrane creating a tunnel


●● what peripheral proteins
Answer: surface proteins on the inner or outer periphery


●● does passive transport require energy
Answer: no energy


●● does active transport require energy
Answer: yes, ATP required

, ●● what are examples of passive processes
Answer: simple diffusion, facilitated diffusion, osmosis


●● what are examples of active processes
Answer: active transport, endocytosis, exocytosis


●● what factors affect the diffusion rate through a membrane
Answer: temperature, weight, steepness, surface area, permeability


●● what is hypertonic
Answer: more solutes outside the cell, cell shrinks


●● what is isotonic
Answer: equal solute outside and inside the cell, cell remains the same


●● what is hypotonic
Answer: more solute inside than outside the cell, cell expands


●● what is endoplasmic reticulum (ER)
Answer: tubular transportation network within the cell


●● what does rough ER make