Chapter 5 Quiz
The amount of energy needed to raise one gram of water one degree Celsius is called
A calorie
energy of activation
is the energy required for molecules to react with each other
Entropy is a term used to indicated the relative amount of
Disorganization
ATP releases energy when____
a phosphate is removed
which of the following is an example of simple diffusion
a sugar cube dissolves in coffee
Requires energy input
active transport
the concentration of calcium in a cell is 3%. the concentration of calcium in the surrounding fluid is 1%. which of the following processes could the cell use to obtain more calcium
active transport
which of these words should be classified separately from the others? osmosis diffusion passive transport active transport facilitated diffusion
active transport
The movement of water across the plasma membrane of a cell is facilitated by
aquaporins channel proteins
which of the following molecules is able to move across the cell membrane by simple diffusion
carbon dioxide
Movement of molecules from an area of high concentration to an area of low concentration.
diffusion, facilitated diffusion, osmosis
The active site of an enzyme
is the part of the enzyme where its substrate can fit
Enzymes are usually named based on the substrate that they bind. this is possible because
each type of enzyme binds only one specific substrate
Uses a membrane protein
facilitated diffusion active transport
intestinal cells absorb glucose via active transport. what would happen if all the mitochondria within these international cells were destroyed
glucose absorption would decrease
Seawater is ____ to blood pressure because it contains a(n) ______ concentration of solutes
hypertonic; higher
a patient who is admitted to the hospital shares that she has been taking water pills to help her lose weight. her skin and mucous membranes are dry, and she is complaining of a headache. the physician ask for an IV treatment to be promptly administered. Based on the information given, what would likely be the type of IV solution given to this patient?
hypotonic
during an osmosis experiment, you place some plant cells under the microscope. you notice the cells seem very swollen. what type of solution were the cells immersed in?
hypotonic
ATP is a good source of energy for a cell because
it is versatile- it can be used in many types of reactions Its breakdown is easily coupled with energy requiring reactions It provides just the right amount of energy for cellular reactions
Enzymes are able to speed up the rate of a reaction by
lowering the energy needed for the reaction to proceed
Movement of water across a membrane
osmosis
what process allows water to move across a cell membrane
osmosis
a white blood cell surrounds an engulfs a worn-out red blood cell. this process is called ?
phagocytosis
A coated pit is associated with
receptor-mediated endocytisis
If blood cells are placed in a hypertonic solution, the cells will
shrink due to water loss by the cell
what is the correct list of the order in which energy flows through an ecosystem
solar energy-chloroplasts-mitochondria
Once the substrate moves into the active site of the enzyme
the enzyme alters in shape to more closely fit the substrate.
In the induced fit model of enzyme action,
the enzyme changes shape slightly to accommodate the substrate
A tube with a membrane covering the bottom is placed in a beaker. the membrane allows water to flow through but not salt or glucose. if the tube contains an aqueous solution with 4% salt and 20% glucose and the beaker contains an aqueous solution with 12% salt and 6% glucose, what would happen to the level of the water in the tube
the level of the solution in the tone would rise because there are more dissolved solutes in the tube than the beaker
Considering the ATP cycle, which of the following would have the most potential energy to perform work for cell activities?
ATP
Identify the incorrect statement
ATP consists of an adenine, a sugar, and two phosphates
Why do metabolic pathways require tens to hundreds of different enzymes?
Each enzyme has a specific substrate and produces a specific product.
Which of the following is correct regarding the laws of energy?
Energy cannot be created or destroyed Energy can be changed from one form to another Energy is lost as heat when it is converted from one form to another
Which energy association is correct?
Kinetic energy is the energy of motion.
Enzymes catalyze reactions by
is identical in structure for all enzymes us the part of the enzyme where its substrate can fit
