Biology EOC Review Unit 4 Questions and
Answers Graded A+
How do animal cells differ from plant cells (structure and function)? plant: cell wall and
membrane; chlorophyll in chloroplasts; cellular respiration and photosynthesis; large, central
vacuole; spindle fibers (instead of centrioles)
animal: cell membrane (only); cellular respiration; centrioles
What is active transport? movement of chemical substances usually across the cell
membrane, against a concentration gradient; requires energy
What is passive transport? movement of substances across the cell membrane without
the use of energy by the cell
What does it mean when you say that cell membranes are highly selective barriers? it
only allows certain things to pass through (not all)
, Describe the fluid mosaic model phospholipid bilayer behaves like a fluid more than like a
solid; the membrane's lipids and proteins can move laterally within the bilayer, causing the cell
membrane to constantly change
Describe the specific events occurring in the G1 phase of the cell cycle. offspring cells
grow to mature size; following cell division, preceding DNA replication
Describe the specific events occurring in the S phase of the cell cycle. the cell's DNA is
copied (synthesized)
Descrive the specific events occurring in the mitosis phase of the cell cycle. cell division
that results in new cells with genetic material that identical to that of the original cell; occurs in
cells undergoing growth, repair, or asexual reproduction
Describe the specific events occurring in the cytokinesis phase of the cell cycle. the cell's
cytoplasm divides
Answers Graded A+
How do animal cells differ from plant cells (structure and function)? plant: cell wall and
membrane; chlorophyll in chloroplasts; cellular respiration and photosynthesis; large, central
vacuole; spindle fibers (instead of centrioles)
animal: cell membrane (only); cellular respiration; centrioles
What is active transport? movement of chemical substances usually across the cell
membrane, against a concentration gradient; requires energy
What is passive transport? movement of substances across the cell membrane without
the use of energy by the cell
What does it mean when you say that cell membranes are highly selective barriers? it
only allows certain things to pass through (not all)
, Describe the fluid mosaic model phospholipid bilayer behaves like a fluid more than like a
solid; the membrane's lipids and proteins can move laterally within the bilayer, causing the cell
membrane to constantly change
Describe the specific events occurring in the G1 phase of the cell cycle. offspring cells
grow to mature size; following cell division, preceding DNA replication
Describe the specific events occurring in the S phase of the cell cycle. the cell's DNA is
copied (synthesized)
Descrive the specific events occurring in the mitosis phase of the cell cycle. cell division
that results in new cells with genetic material that identical to that of the original cell; occurs in
cells undergoing growth, repair, or asexual reproduction
Describe the specific events occurring in the cytokinesis phase of the cell cycle. the cell's
cytoplasm divides
