Biol 1201 Exam 2 Review Biology for Science Majors 1
DR. B Questions with 100% Verified Answers Latest
Update
Question: What is passive transport?
Answer:
Movement of substances across a membrane without energy, from high concentration to
low concentration.
Question: What is active transport?
Answer:
Movement of substances across a membrane using energy (ATP), usually against the
concentration gradient.
Question:
Answer:
Question: What is bulk transport?
Answer:
Movement of large molecules or particles using vesicles (exocytosis or endocytosis).
Question: What is the fluid mosaic model?
Answer:
Model describing membranes as a fluid phospholipid bilayer with proteins embedded
throughout.
Question: Why does the membrane have fluidity?
Answer:
Phospholipids can move laterally within the bilayer.
Question: What happens to membrane fluidity at cooler temperatures?
Answer:
Phospholipids pack tightly and the membrane becomes less fluid.
Question: What happens to membrane fluidity at warmer temperatures?
Answer:
Phospholipids move more freely and the membrane becomes more fluid.
, Question: What are membrane proteins composed of?
Answer:
Regions that are both hydrophobic and hydrophilic.
Question: What are integrin proteins?
Answer:
Proteins that attach the cell to the extracellular matrix and connect it to the cytoskeleton.
Question: What are the functions of integral proteins?
Answer:
Transport, enzymatic activity, signal transduction, cell-cell recognition, and intercellular
joining.
Question: What are glycolipids?
Answer:
Lipids with carbohydrate chains attached that help with cell recognition.
Question: What are glycoproteins?
Answer:
Proteins with carbohydrate chains attached used in cell recognition.
Question: What is selective permeability?
Answer:
The membrane allows some substances to pass while blocking others.
Question: What are aquaporins?
Answer:
Channel proteins that specifically transport water across membranes.
Question: What are carrier proteins?
Answer:
Proteins that bind to molecules and change shape to move them across membranes.
Question: What is diffusion?
Answer:
Movement of molecules from high concentration to low concentration.
DR. B Questions with 100% Verified Answers Latest
Update
Question: What is passive transport?
Answer:
Movement of substances across a membrane without energy, from high concentration to
low concentration.
Question: What is active transport?
Answer:
Movement of substances across a membrane using energy (ATP), usually against the
concentration gradient.
Question:
Answer:
Question: What is bulk transport?
Answer:
Movement of large molecules or particles using vesicles (exocytosis or endocytosis).
Question: What is the fluid mosaic model?
Answer:
Model describing membranes as a fluid phospholipid bilayer with proteins embedded
throughout.
Question: Why does the membrane have fluidity?
Answer:
Phospholipids can move laterally within the bilayer.
Question: What happens to membrane fluidity at cooler temperatures?
Answer:
Phospholipids pack tightly and the membrane becomes less fluid.
Question: What happens to membrane fluidity at warmer temperatures?
Answer:
Phospholipids move more freely and the membrane becomes more fluid.
, Question: What are membrane proteins composed of?
Answer:
Regions that are both hydrophobic and hydrophilic.
Question: What are integrin proteins?
Answer:
Proteins that attach the cell to the extracellular matrix and connect it to the cytoskeleton.
Question: What are the functions of integral proteins?
Answer:
Transport, enzymatic activity, signal transduction, cell-cell recognition, and intercellular
joining.
Question: What are glycolipids?
Answer:
Lipids with carbohydrate chains attached that help with cell recognition.
Question: What are glycoproteins?
Answer:
Proteins with carbohydrate chains attached used in cell recognition.
Question: What is selective permeability?
Answer:
The membrane allows some substances to pass while blocking others.
Question: What are aquaporins?
Answer:
Channel proteins that specifically transport water across membranes.
Question: What are carrier proteins?
Answer:
Proteins that bind to molecules and change shape to move them across membranes.
Question: What is diffusion?
Answer:
Movement of molecules from high concentration to low concentration.
