Biology quiz part two
The mathematical expression for the change in free energy of system is ∆G=∆H-T∆S. Which of the following is correct
G is the change in free energy
which of the following is true for anabolic pathways
they consume energy to build up polymers from monomers
What was the substrate used in the enzyme catalysis lab?
PNPP
What is the name of the functional group that was cleaved?
Phosphate
Which of the following statements is true concerning catabolic pathways
They supply energy thats released during catabolic reactions, primarily in the form of ATP, for the cell work
Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier know as the reactions
activation energy
Identify the enzymes that you used in the Enzyme catalysis lab
alkaline phosphatase
How does a noncompetitive inhibitor decrease the rate of an enzyme reaction
by changing the shape of the enzymes active site
How might an amino acid change at a site distant from the active site of the enzymes alter the enzymes substrate specificity
by changing the shape of the protein
A system at chemical equilibrium
can do no work
which term most precisely describes the cellular process of breaking down large molecules into smaller ones
catabolism
which of the following is a statement of the first of thermodynamics
energy cannot be created or destroyed
Which of the following statements regarding enzymes is true
enzymes increase the rate of a reaction by lowering the activation energy barrier
choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as _____ is to_____
exergonic; endergonic
The mechanism in which the end product of a metabolic pathways inhibits an earlier step in the pathway in most precisely described as
feedback inhibition
If metabolism is the sum of all chemical reactions in an organism then having a low metabolism might indicate what about someone's enzymes and enzymatic activity in their body
if someone has low metabolism they might also have a lack of enzymes to perform chemical reactions as well as low enzymatic activity
If this is an enzymes catalyzed reaction how can the rate of reaction be increased beyond the maximum velocity in this figure
increase the amount of enzyme
the active site of an enzyme is the region that
is involved in the catalytic reaction of the enzyme
What is true about allosteric site
it can function as an on/off switch
which of the following is true of metabolism in its entirety in all organism
metabolism consists of all the energy transformation reactions in an organism
If the enzyme is added to a solution where its substrate and product are in equilibrium what will occur
nothing; the reaction will stay at equilibrium
For living organisms, which of the following is an important consequence of the first law of thermodynamics
the organism ultimately must obtain all of the necessary energy for life from its environment
What was the purpose of the lab and why do we care about enzymes?
the purpose was to observe how enzymes sped up the reaction and how inhibitors affected it, as well as the amount of light absorbed . Enzymes are used in almost every reaction that occurs in our bodies, its important to know how they affect us
Which of the following statements is true about enzymes catalyzed reactions
the reaction is faster than the same reaction in the absence of the enzymes
