Bio 101 Exam 2 comprehensive
Questions and Answers with Verified
Solutions
Question 1:
What is the structure of a cell membrane?
Answer:
Phospholipid bilayer
Question 2:
What is the phospholipid bilayer made of?
Answer:
two layers of phospholipids - heads = hydrophilic tails = hydrophobic -
middle section repels water - makes membrane selectively permeable
Question 3:
What is the phospholipid structure?
Answer:
Glycerol backbone - 2 fatty acid tails - 1 phosphate group - molecule is
amphiphilic = both hydrophobic + hydrophilic
Question 4:
What is the fluid mosaic model?
Answer:
fluid = membrane has slight movement - Mosaic = made of many different
components - Not rigid like a cell wall
,Question 5:
What does cholesterol do?
Answer:
helps regulate membrane fluidity
Question 6:
What type of cell is cholesterol found in?
Answer:
animal cells only
Question 7:
What are carbohydrates important for?
Answer:
cell recognition
Question 8:
What are examples of carbohydrates?
Answer:
glycoprotein, glycolipid
Question 9:
What is glycoprotein?
Answer:
Carb + protein
, Question 10:
Answer:
Carb + lipid
Question 11:
What are the 6 types of integral proteins?
Answer:
channel, carrier, marker, receptor, enzymatic, and junction proteins
Question 12:
What are the aspects of channel proteins?
Answer:
Allows molecules to move from high to low concentration - passive
transport (diffusion) - not selective - no ATP required
Question 13:
What are the aspects of the special channel protein aquaporin?
Answer:
only transports water - passive transport - allows water molecules to pass
through single file at a very high rate
Question 14:
What are the aspects of a carrier protein?
Answer:
Move molecules from low to high concentration - requires ATP - specific
to certain molecules - active transport
Questions and Answers with Verified
Solutions
Question 1:
What is the structure of a cell membrane?
Answer:
Phospholipid bilayer
Question 2:
What is the phospholipid bilayer made of?
Answer:
two layers of phospholipids - heads = hydrophilic tails = hydrophobic -
middle section repels water - makes membrane selectively permeable
Question 3:
What is the phospholipid structure?
Answer:
Glycerol backbone - 2 fatty acid tails - 1 phosphate group - molecule is
amphiphilic = both hydrophobic + hydrophilic
Question 4:
What is the fluid mosaic model?
Answer:
fluid = membrane has slight movement - Mosaic = made of many different
components - Not rigid like a cell wall
,Question 5:
What does cholesterol do?
Answer:
helps regulate membrane fluidity
Question 6:
What type of cell is cholesterol found in?
Answer:
animal cells only
Question 7:
What are carbohydrates important for?
Answer:
cell recognition
Question 8:
What are examples of carbohydrates?
Answer:
glycoprotein, glycolipid
Question 9:
What is glycoprotein?
Answer:
Carb + protein
, Question 10:
Answer:
Carb + lipid
Question 11:
What are the 6 types of integral proteins?
Answer:
channel, carrier, marker, receptor, enzymatic, and junction proteins
Question 12:
What are the aspects of channel proteins?
Answer:
Allows molecules to move from high to low concentration - passive
transport (diffusion) - not selective - no ATP required
Question 13:
What are the aspects of the special channel protein aquaporin?
Answer:
only transports water - passive transport - allows water molecules to pass
through single file at a very high rate
Question 14:
What are the aspects of a carrier protein?
Answer:
Move molecules from low to high concentration - requires ATP - specific
to certain molecules - active transport
