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Activity: Energy Transformations
Part A
Which of these is exhibiting kinetic energy?
a rock on a mountain ledge
an archer with a flexed bow
a space station orbiting Earth
the high-energy phosphate bonds of a molecule of ATP
a person sitting on a couch while watching TV
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a space station orbiting Earth
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Part B
"Conservation of energy" refers to the fact that _____.
the entropy of the universe is always increasing
no chemical reaction is 100 percent efficient
energy cannot be created or destroyed but can be converted from one form to another
the net amount of disorder is always increasing
if you conserve energy you will not be as tired
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energy cannot be created or destroyed but can be converted from one form to another
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Part C
Chemical energy is a form of _____ energy.
heat
kinetic
entropic
motion
potential
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potential
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Part D
In your body, what process converts the chemical energy found in glucose into the chemical energy found in ATP?
redox
potentiation
anabolism
cellular respiration
digestion
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cellular respiration
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Part E
Which of these are by-products of cellular respiration?
ATP
heat and water
ATP and water
glucose and water
water
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heat and water
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Activity: How Enzymes Work
Part A
Most enzymes are _____.
nucleic acids
minerals
proteins
lipids
carbohydrates
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proteins
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Part B
Enzymes work by _____.
decreasing the potential energy difference between reactant and product
adding energy to a reaction
reducing activation energy
increasing the potential energy difference between reactant and product
adding a phosphate group to a reactant
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reducing activation energy
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Part C
An enzyme _____.
is a inorganic catalyst
can bind to nearly any molecule
increases the the activation energy of a reaction
is a source of energy for endergonic reactions
is an organic catalyst
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is an organic catalyst
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Part D
What name is given to the reactants in an enzymatically catalyzed reaction?
reactors
products
substrate
active sites
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substrate
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Part E
As a result of its involvement in a reaction, an enzyme _____.
is unchanged
permanently alters its shape.
loses energy
is used up
loses a phosphate group
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is unchanged
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Part F
What is the correct label for "A"?
ATP
substrate energy
energy of activation
uphill
enzyme energy
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energy of activation
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Activity: Selective Permeability of Membranes
Part A
Structure A in the figure is a(n) _____.
structural protein
transport protein
enzyme
receptor molecule
antibody
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transport protein
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Part B
Which of these is hydrophobic like the interior of the plasma membrane
C
D
B
C and D
A
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A
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Activity: Osmosis and Water Balance in Cells
Part A
What name is given to the process by which water crosses a selectively permeable membrane?
osmosis
pinocytosis
passive transport
diffusion
phagocytosis
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osmosis
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Part B
This cell is in a(n) _____ solution.
hypertonic or isotonic
isotonic
hypertonic
hypotonic
hypotonic and isotonic
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hypertonic
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Part C
You know that this cell is in a(n) _____ solution because the cell _____
isotonic … neither lost nor gained water
hypotonic … swelled
hypotonic … shrunk
hypertonic … gained water
hypertonic … lost water
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hypotonic … swelled
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Part D
You know that this cell is in a(n) _____ solution because it _____.
hypertonic … gained water
hypertonic … lysed
hypotonic … lysed
hypertonic solution … lost water
hypotonic … is turgid
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hypertonic solution … lost water
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Activity: Exocytosis and Endocytosis
Part A
Endocytosis moves materials _____ a cell via _____.
into … membranous vesicles
into … facilitated diffusion
out of … diffusion
into … a transport protein
out of … membranous vesicles
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into … membranous vesicles
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Part B
You can recognize the process of pinocytosis when _____.
the cell is engulfing extracellular fluid
a receptor protein is involved
the cell is engulfing a large particle
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the cell is engulfing extracellular fluid
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Part C
A white blood cell engulfing a bacterium is an example of _____.
facilitated diffusion
receptor-mediated endocytosis
phagocytosis
pinocytosis
exocytosis
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phagocytosis
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BioFlix Activity: Membrane Transport — Active Transport
Certain molecules cross the plasma membrane through the process of active transport. Active transport requires an input of energy and moves molecules against their concentration gradient.
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a) Side with a lower concentration of square molecules b) Transport protein c) Energy input from the cell d) Plasma Membrane e) Side with a higher concentration of square molecules
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BioFlix Activity: Membrane Transport — Diffusion
Certain molecules use diffusion to cross the plasma membrane.
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a)Side with higher concentration of molecules b) Plasma membrane c) Side with lower concentration of molecules d) Diffusion causes a net movement of molecules down their concentration gradient
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BioFlix Activity: Membrane Transport — Facilitated Diffusion
Certain molecules use facilitated diffusion to cross the plasma membrane.
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a) plasma membrane b) side with higher concentration of molecules c) side with lower concentration of molecules d) facilitated diffusion causes a net movement of molecules down their concentration gradient e) transport protein
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Which is the best definition of energy?
the conversion of one form of chemical energy to another form of chemical energy
ATP
the conversion of light energy to chemical energy
the capacity to cause change
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the capacity to cause change
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Cells use this molecule to store the chemical energy released by the breakdown of food molecules during cellular respiration.
glucose
CO2
O2
ATP
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ATP
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Which are materials found in a molecule of ATP?
an organic molecule called adenosine plus two phosphate groups
an organic molecule called cytosine plus three phosphate groups
amino acids in a precise sequence
an organic molecule called adenosine plus three phosphate groups
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an organic molecule called adenosine plus three phosphate groups
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Activation energy can be described as __________.
metabolism
energy needed to activate the reactants and trigger a chemical reaction
energy needed to activate an enzyme
energy released by a chemical reaction
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energy needed to activate the reactants and trigger a chemical reaction
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