HAPS REVIEW 4 CERTIFICATION EVALUATION
2026 QUESTIONS WITH PRACTICE SOLUTION
GRADED A+
◉ The study of cells is known as __________? Answer: Cytology
◉ What is the difference between cytosol and cytoplasm? Answer:
Cytosol = the fluid within a cell
Cytoplasm = Cytosol + Organelles & Inclusions
◉ Which organelle of the cell is *NOT* considered to be part of the
cytoplasm? Answer: Nucleus!
◉ Cells all have a __________________, cytoplasm, and nucleus?
Hint: Outside -> in! Answer: Plasma Membrane
◉ The _____________________ model describes how proteins float around
randomly like icebergs on the the surface of a cell? Answer: Fluid
Mosaic
,◉ The plasma membrane of a cell is composed of lipids and
_____________? Answer: Proteins
◉ (T/F) The plasma membrane is 50% Protein, 50% lipid *by
weight*? Answer: True!
Proteins are much heavier than lipids!
◉ The four functions of the plasma membrane are to act as a
__________________, be selectively permeable, maintain the
electrochemical gradient, and use cell-surface receptors for
communication?
Hint: Protect! Answer: Physical barrier
◉ The four functions of the plasma membrane are to act as a
physical barrier, be _____________________, maintain the electrochemical
gradient, and use cell-surface receptors for communication?
Hint: We only let certain stuff in... Answer: Selectively Permeable
◉ The four functions of the plasma membrane are to act as a
physical barrier, be selectively permeable, maintain the
,_______________________, and use cell-surface receptors for
communication?
Hint: Negative... Positive... Answer: Electrochemical Gradient
◉ The four functions of the plasma membrane are to act as a
physical barrier, be selectively permeable, maintain the
electrochemical gradient, and use ___________________ for
communication?
Hint: Send and ______________? Answer: Cell-surface Receptors
◉ A phospholipid is composed of a ___________________ head, and a
___________________ tail?
Hint: Love/Hate water? Answer: Hydrophillic
Hydrophobic
◉ When phospholipids arrange into a bi-layer, the (Heads/Tails) are
together on the 'inside' of the bi-layer? Answer: Tails
◉ What is the purpose of cholesterols being embedded into the
'tails' region of a phospholipid bi-layer?
, Hint: "You're hot, then you're cold!..." Answer: Cholesterols stabilize
the cell membrane during temperature changes. :)
◉ A _______________ acts as part of a 'name badge' on the surface of a
cell?
Hint: *sugar* attached to a *fat* Answer: Glycolipid
◉ What are the three types of lipids you find in the plasma
membrane?
Hints: Bi-layer, Temperatures, ID Badge Answer: Phospholipids
Cholesterols
Glycolipids
◉ What is the difference between an integral and peripheral protein
in regards to the cell membrane? Answer: Integral:
Integrated/Embedded within -- goes all the way through the bi-layer.
2026 QUESTIONS WITH PRACTICE SOLUTION
GRADED A+
◉ The study of cells is known as __________? Answer: Cytology
◉ What is the difference between cytosol and cytoplasm? Answer:
Cytosol = the fluid within a cell
Cytoplasm = Cytosol + Organelles & Inclusions
◉ Which organelle of the cell is *NOT* considered to be part of the
cytoplasm? Answer: Nucleus!
◉ Cells all have a __________________, cytoplasm, and nucleus?
Hint: Outside -> in! Answer: Plasma Membrane
◉ The _____________________ model describes how proteins float around
randomly like icebergs on the the surface of a cell? Answer: Fluid
Mosaic
,◉ The plasma membrane of a cell is composed of lipids and
_____________? Answer: Proteins
◉ (T/F) The plasma membrane is 50% Protein, 50% lipid *by
weight*? Answer: True!
Proteins are much heavier than lipids!
◉ The four functions of the plasma membrane are to act as a
__________________, be selectively permeable, maintain the
electrochemical gradient, and use cell-surface receptors for
communication?
Hint: Protect! Answer: Physical barrier
◉ The four functions of the plasma membrane are to act as a
physical barrier, be _____________________, maintain the electrochemical
gradient, and use cell-surface receptors for communication?
Hint: We only let certain stuff in... Answer: Selectively Permeable
◉ The four functions of the plasma membrane are to act as a
physical barrier, be selectively permeable, maintain the
,_______________________, and use cell-surface receptors for
communication?
Hint: Negative... Positive... Answer: Electrochemical Gradient
◉ The four functions of the plasma membrane are to act as a
physical barrier, be selectively permeable, maintain the
electrochemical gradient, and use ___________________ for
communication?
Hint: Send and ______________? Answer: Cell-surface Receptors
◉ A phospholipid is composed of a ___________________ head, and a
___________________ tail?
Hint: Love/Hate water? Answer: Hydrophillic
Hydrophobic
◉ When phospholipids arrange into a bi-layer, the (Heads/Tails) are
together on the 'inside' of the bi-layer? Answer: Tails
◉ What is the purpose of cholesterols being embedded into the
'tails' region of a phospholipid bi-layer?
, Hint: "You're hot, then you're cold!..." Answer: Cholesterols stabilize
the cell membrane during temperature changes. :)
◉ A _______________ acts as part of a 'name badge' on the surface of a
cell?
Hint: *sugar* attached to a *fat* Answer: Glycolipid
◉ What are the three types of lipids you find in the plasma
membrane?
Hints: Bi-layer, Temperatures, ID Badge Answer: Phospholipids
Cholesterols
Glycolipids
◉ What is the difference between an integral and peripheral protein
in regards to the cell membrane? Answer: Integral:
Integrated/Embedded within -- goes all the way through the bi-layer.
