Questão 1
Questão
Which of the following is not a passive transport process?
Responda
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dialysis
-
osmosis
-
filtration
-
pinocytosis
Questão 2
Questão
Diffusion of water through a selectively permeable membrane in the presence of at least one impermeant solute is referred to as:
Responda
-
diffusion
-
osmosis
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phagocytosis
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dialysis
Questão 3
Questão
The trapping of bacteria by specialized white blood cells is an example of
Responda
-
pinocytosis
-
exocytosis
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phagocytosis
-
none of the above
Questão 4
Questão
A hypertonic solution is one that contains
Responda
-
a greater concentration of solute than the cell
-
the same concentration of solute as the cell
-
a lesser concentration of solute as the cell
-
none of the above
Questão 5
Questão
The force of a fluid pushing against a surface could be described as
Responda
-
facilitated diffusion
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hydrostatic pressure
-
hypostatic pressure
-
none of the above
Questão 6
Questão
Facilitated diffusion is a metabolically expensive process
Questão 7
Questão
The sodium-potassium pump is an example of an active transport process
Questão 8
Questão
Cellular secretion can be achieved by exocytosis
Questão 9
Questão
Solutes are particles dissolved in a solvent.
Questão 10
Questão
Osmosis is a form of filtration that results in the separation of small and large solute particles.
Questão 11
Questão
[blank_start]Hypertonic[blank_end]: solution that draws water from a cell
[blank_start]Isotonic[blank_end]: two fluids that have the same potential osmotic pressure
[blank_start]Hypotonic[blank_end]: solution that causes cells to swell
[blank_start]Diffusion[blank_end]: passive transport
[blank_start]Endocytosis[blank_end]: active transport
Responda
-
Hypertonic
-
Isotonic
-
Hypotonic
-
Diffusion
-
Endocytosis
Questão 12
Questão
Enzymes that cause essential chemical reactions to occur are called
Responda
-
metabolic agents
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catalysts
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substrates
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initiators
Questão 13
Questão
Molecules that are acted upon by enzymes are known as
Responda
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diploid
-
hypertonic
-
introns
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subtrates
Questão 14
Questão
In naming enzymes, the root name of the substance whose chemical reaction is catalyzed is followed by the suffix
Questão 15
Responda
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are specific in their action
-
can alter their function by changing the shape of the molecule
-
are synthesized as inactive proenzymes
-
all of the above
Questão 16
Questão
Which of the following activates enzymes by means of an allosteric effect?
Responda
-
end-product inhibition
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kinases
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substrate
-
pepsin
Questão 17
Responda
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fats
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proteins
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carbohydrates
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minerals
Questão 18
Questão
The three processes that compose cellular respiration are glycolysis, the citric acid cycle, and the electron transport system.
Questão 19
Questão
The portion of an enzyme molecule that chemically "fits" the substrate molecule(s) is referred to as the active site.
Questão 20
Questão
The "lock and key" model is used to describe how DNA base pairs align.
Questão 21
Questão
Protein anabolism is a major cellular activity.
Questão 22
Questão
The citric acid cycle is also known as the Krebs cycle.
Questão 23
Questão
Glycolysis is aerobic.
Questão 24
Questão
Which of the following statements is not true of glycolysis?
Responda
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It occurs in the cytoplasm of the cell
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It is also known as the Krebs cycle
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It is anaerobic
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Glycolysis splits one molecule of glucose into two molecules of pyruvic acid
Questão 25
Questão
The Krebs cycle takes place in the
Responda
-
ribosome
-
cytoplasm
-
mitochondria
-
Golgi apparatus
Questão 26
Questão
The third step in cellular respiration is
Questão 27
Questão
The energy required for active transport processes is obtained from
Responda
-
ATP
-
DNA
-
diffusion
-
osmosis
Questão 28
Questão
Movement of substances from a region of high concentration to a region of low concentration is
Responda
-
active transport
-
passive transport
-
cellular energy
-
concentration gradient
Questão 29
Questão
Osmosis is the [blank_start]diffusion[blank_end] of water across a selectively permeable membrane.
Responda
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diffusion
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filtration
-
equilibrium
-
active transport
Questão 30
Questão
A molecule or other agent that alters enzyme function by changing its shape is called:
Responda
-
an allosteric effector
-
a kinase
-
an anabolic agent
-
a proenzyme
Questão 31
Questão
Glycolysis is a catabolic pathway that begins with glucose and ends with:
Responda
-
oxygen
-
filtration
-
pyruvic acid
-
sodium
Questão 32
Questão
Which movement always occur down a hydrostatic pressure gradient?
Responda
-
osmosis
-
filtration
-
pyruvic acid
-
sodium
Questão 33
Questão
The "uphill" movement of a substance through a living cell membrane is
Responda
-
osmosis
-
diffusion
-
active transport
-
passive transport
Questão 34
Questão
Membrane pumps are an example of which type of movement?
Responda
-
gravity
-
hydrostatic pressure
-
active transport
-
passive transport
Questão 35
Questão
An example of a cell that performs phagocytosis
Responda
-
white blood cell
-
red blood cells
-
muscle cell
-
bone cell
Questão 36
Questão
A saline solution that contains a higher concentration of salt than living red blood cells would be
Responda
-
hypotonic
-
hypertonic
-
isotonic
-
homeostatic
Questão 37
Questão
A red blood cell becomes engorged with water and will eventually lyse, releasing hemoglobin into the solution. This solution is [blank_start]hypotonic[blank_end] to the red blood cell.
Responda
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hypotonic
-
hypertonic
-
isotonic
-
homeostatic
Questão 38
Questão
Protein "tunnels": [blank_start]membrane channels[blank_end]
Phagocytosis: [blank_start]endocytosis[blank_end]
Enzyme: [blank_start]pepsin[blank_end]
Enzymes that add or remove carbon dioxide: [blank_start]carboxylases[blank_end]
"Cell drinking": [blank_start]pinocytosis[blank_end]
Type of membrane channel: [blank_start]aquaporins[blank_end]
Facilitated diffusion: [blank_start]carrier-mediated passive transport[blank_end]
Glycolysis: [blank_start]first stage of cellular respiration[blank_end]
Molecule able to diffuse across a particular membrane: [blank_start]permeant[blank_end]