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WorksheetsProtein metabolism and enzymes
Total questions: 20
Worksheet time: 12mins
What happens when animals die
Their nitrogen compounds dissipate into the air
Their nitrogen compounds will return to the soil
Their nitrogen compounds produce toxic gas
Their nitrogen compounds combine with oxygen
How animals get the nitrogen they need
from the air they breathe
from the water they drink
from the food they eat
from the Sun
What is the role of denitrifying bacteria
change nitrate back into nitrogen gas
change nitrogen gas into nitrate
absorb carbon dioxide in the soil
release oxygen gas into the atmosphere
What is the role of Michaelis-Menten equation?
To calculate the free energy
Mathematically explain the relationship of enzyme's velocity and the substrate concentration
Mathematically explain the saturation of enzyme in substrate
To simplify Lineweaver-Burke plot
Select the incorrect statement related to Michaelis-Menten plot (graph)
At zero concentration of substrate, meaning [S]=0, the velocity is zero
As the concentration of the substrate increases, the formation of product also increases
The plot is generated using different concentration of substrate
The plot is generated using different concentration of enzyme
Choose the incorrect statement on Km.
The unit for length is cm. The unit for Km is substrate concentration
Km is the value of [S] when the velocity is half Vmax
Km can be obtained directly from Lineweaver-Burke plot
Km is a Michaelis-Menten constant
In which type of Inhibition where the inhibitor binds to the same active site of the substrate?
Uncompetitive
Non competitive
Competitive
All of the above
Which domain of an enzyme is non-protein?
Active site
The stabilizing body
The upper most region
Co-factor
If the temperature is reduced to 27 degree celcius, a reaction rate will ______
increase
decrease
stay the same
If the concentration of a reactant is increased, the reaction rate will ___________.
increase
decrease
stay the same
Which amino acid participate directly in the urea cycle?
Aspartate
Alanine
Fumarate
Glutamine
Graph a is the normal enzyme plot of rate of reaction vs substrate concentration. Graph b and c are the graphs plotted with inhibitors. Graph ____ is a __________ type of inhibition with a lowered Vmax.
b, competitive
b, noncompetitive
c, competitive
c, noncompetitive
Aquatic animals produce ______________ and insects produce _____________ as their nitrogenous waste
ammonia, urea
ammonia, uric acid
urea, ammonia
uric acid, ammonia
In transamination, the NH2 group on one molecule is exchanged with the =O group on the other molecule. The amino acid becomes α-keto acid _____________, and α-keto acid becomes an α-amino acid _____________
(anabolism), (catabolism)
(catabolism), (anabolism)
(anabolism), (biosynthesis)
(catabolism), (breakdown)
Essential amino acids ___________________ .
examples are glutamate and glutamine
needs to be consumed to fulfill our requirements
is already being produced in our body
is needed by E.coli
Production of glutamate is _______________ whereas production of glutamine is _______________.
reductive amination, amidation
reductive amination, amination
reductive amination, transamination
non of above
What is the meaning of these terms: [E], [S], [ES]
Respectively for Enzyme's effectiveness, Substrate, and complex of enzyme-substrate concentration
Respectively for Enzyme, Substrate, and Enzyme-Substrate concentration
Respectively for Enzyme, Substrate and Product concentration
Respectively form Product concentration
Velocity, V=dtd[P] is the equation for enzyme's velocity. Which of the following information are incorrect?
Velocity is the rate of product formation over time
Velocity is a measurement of rate
Velocity measures the depletion of the substrate
Velocity measures the formation of the product
