APHY 101 Cells Exam Questions With
All Correct Answers
What is found in the cytoplasm? - ANSWER- organelles, cytosol, cytoskeleton
A network of microtubules and microfilaments form a structure called the
______________ of the cell. - ANSWER- cytoskeleton
The ________ is surrounded by an envelope and contains the genetic material (DNA) of
the cell. - ANSWER- nucleus
What is cytosol? - ANSWER- liquid portion of cytoplasm
A(n) _______ is a specialized structure inside a cell that performs specific functions
such as extracting energy from nutrients or building proteins. - ANSWER- organelles
What are functions of the cell membrane? - ANSWER- 1) Selectively permeable barrier
2) Signal Transduction
Components of the cellular structure called the ________ include phospholipids,
carbohydrates, proteins, and cholestrol. - ANSWER- cell membrane
The cell membrane is composed mostly of a bilayer of - ANSWER- phospholipids
In the cell membrane, ________________, functions as receptors, cell surface makers,
transporters, enzymes, and cellular adhesion molecules. - ANSWER- proteins
Certain membrane proteins work as ________, which admit water molecules, while
others work as ________, which admit small molecules or ions - ANSWER- pores;
channels
What is the term given to the difference in concentration of particles from one area to
another - ANSWER- gradient
T/F: When molecules move down a concentration gradient, it means that there is a net
movement of particles from a region lower concentration to a region oh higher
concentration. - ANSWER- False
What conditions are necessary for diffusion of a substance to occur across a
membrane? - ANSWER- Membrane permeability
Concentration gradient
T/F: Both facilitated diffusion and simple diffusion require no carrier to move molecules
across the membrane. - ANSWER- False
All Correct Answers
What is found in the cytoplasm? - ANSWER- organelles, cytosol, cytoskeleton
A network of microtubules and microfilaments form a structure called the
______________ of the cell. - ANSWER- cytoskeleton
The ________ is surrounded by an envelope and contains the genetic material (DNA) of
the cell. - ANSWER- nucleus
What is cytosol? - ANSWER- liquid portion of cytoplasm
A(n) _______ is a specialized structure inside a cell that performs specific functions
such as extracting energy from nutrients or building proteins. - ANSWER- organelles
What are functions of the cell membrane? - ANSWER- 1) Selectively permeable barrier
2) Signal Transduction
Components of the cellular structure called the ________ include phospholipids,
carbohydrates, proteins, and cholestrol. - ANSWER- cell membrane
The cell membrane is composed mostly of a bilayer of - ANSWER- phospholipids
In the cell membrane, ________________, functions as receptors, cell surface makers,
transporters, enzymes, and cellular adhesion molecules. - ANSWER- proteins
Certain membrane proteins work as ________, which admit water molecules, while
others work as ________, which admit small molecules or ions - ANSWER- pores;
channels
What is the term given to the difference in concentration of particles from one area to
another - ANSWER- gradient
T/F: When molecules move down a concentration gradient, it means that there is a net
movement of particles from a region lower concentration to a region oh higher
concentration. - ANSWER- False
What conditions are necessary for diffusion of a substance to occur across a
membrane? - ANSWER- Membrane permeability
Concentration gradient
T/F: Both facilitated diffusion and simple diffusion require no carrier to move molecules
across the membrane. - ANSWER- False
