Physiology Test 1: Cell physiology
A hypertonic solution is one that contains:
a greater concentration of solute than the cell.
movement that requires cell energy is known as
active transport
the uphill movement of a substance through a membrane
active transport
A molecule or other agent that alters enzyme function by changing its shape is called
allosteric effector
which stage of mitosis do chromosome move to opposite end of the cell
anaphase
True or False: Facilitated diffusion is a metabolically expensive process:
false
True or False: The "lock and key" model is used to describe how DNA pairs align.
false
the concentration _ measures the difference form one area to another
gradient
The force of fluid pushing against a surface could be described as:
hydrostatic pressure
a saline solution that contains a higher concentration of salt than living red blood cel
hypertonic
a red blood cell swells as it entakes water
hypotonic
example of active transport
ion pump
correct order of mitosis
prophase, anaphase, metaphase, telophase
Transcription can be best described as the:
synthesis of mRNA
type of RNA that has an anticodon
tRNA
the synthesis of proteins by ribosomes using information coded in the mRNA molecule is called
translation
True or False: Cellular secretion can be achieved by exocytosis.
true
True or False: Protein anabolism is a major cellular activity.
true
True or False: Solutes are particles dissolved in a solvent.
true
True or False: Telophase is the "completion phase
true
True or False: The portion of an enzyme molecule that chemically "fits" the substrate molecule(s) is referred to as the active site.
true
True or False: The sodium-potassium pump is an example of an active transport process.
true
True or False: The three processes that comprise cellular respiration are glycolsis, the citric acid cycle, and the electron transport chain.
true
True or False: normal mitosis results in daughter cells that are gentically identical to the parent cell.
true
example of a cell that performs phagocytosis
white blood cell
osmosis is the _ of water
diffusion
a cell with 46 chromosome is refered to as:
diploid
the process of _ traps extracellular material abd vrungs it into the cell
endocytosis
a chemical catalyst
enzyme
Diffusion of water through a selectively permeable membrane in the presence of at least one impermeant solute is referred to as:
osmosis
the term _ is known as the diffusion of water
osmosis
Movement of substance from a region of high concentrations to a region of low concentration is
passive transport
The trapping of bacteria by specialized white blood cells is an example of:
phagocytosis
the energy required for active transport process
ATP
True or False: It is during mitosis II that the number of chromosmes is halved
False
Metabolic agents that cause essential chemical reactions to occur are called:
catalysts
In the DNA molecule, a sequence of three base pairs forms a(n):
codon
type of RNA that carries information
mRNA
process of sex cell reproduction
meiosis
known as the sum of the chemical reactions in a cell
metabolism
