Applied A & P: Test 3

which phase of the cell cycle has the biggest extremes in duration

G0

the ___ typically consists of five or six flattened membraneous discs called cisternae

Golgi apparatus

facilitated diffusion differs from from ordinary diffusion in that

the rate of molecular movement is limited by the number of available carrier molecules

during mitosis, two daughter cells form, each of which has

the same number of chromosomes as the original cell

diffusion of a substance across the cell membrane is influenced by all of the following except: a. hydrolysis of ATP. b. the presence of the membrane channels. c. the charge on the ion. d. concentration gradient. e. lipid solubility.

a. NOT TRUE hydrolysis of ATP

the molecule that brings the proper amino acid into place at the ribosome for the elongation of a new protein is called

tRNA

the genetically programmed death of cells is called

apoptosis

all of the following membrane transport mechanisms are passive processes except: a. diffusion. b. facilitated diffusion c. vesicular transport d. osmosis e. movement of water.

c. NOT TRUE vesicular transport

components of the cytoskeleton may include all of the following but: a. microfilaments b. intermediate filaments c. microsomes d microtubules e. thick filaments

c. NOT microsomes

which of the following statements concerning mitochondria is false: a. the cristae increase the inner surface area of the organelle. b. the matrix contains metabolic enzymes involved in ATP synthesis. c. respiratory enzymes are attached to the surface of the cristae. d. the mitochondria require carbon dioxide and produce oxygen in the process of energy transformation. e. the mitochondria produce most of a cell's ATP.

d. FALSE the mitochondria require carbon dioxide and produce oxygen in the process of energy transformation

which best describes osmosis

diffusion of water from a greater to a lesser water concentration across a selectively permeable membrane

osmotic pressure: a. forces water to move toward higher solute concentration b. forces water across a semipermeable membrane c. can be opposed by hydrostatic pressure d. increases as solute concentration increases e. ALL

e. ALL

the plasma membrane includes: a. integral proteins, b. glycolipids c. phospholipids d. cholesterol e. ALL

e. ALL

the tails of a phospholipid molecule are

hydrophobic

the stage in a cells life cycle in which the cell performs its normal functions and prepares for division is called ___

interphase

when is DNA replicated

interphase

in the mitochondrion, folds are to cristae as the contained fluid is to

matrix

the components of ribosomes are formed within

nucleoli

a(n) ___ is a mutant of a regulatory gene that causes cancer

oncogene

___ are responsible for identifying and digesting damaged or denatured proteins

proteasomes