Among the farmers investigated, how many of them claimed to be suffering from organophosph
A.179
B.130
C.21
D.10%
A.179
B.130
C.21
D.10%
A、Advertising and other promotional efforts
B、The customer's experience of the organisation, product, or brand
C、The price of the organisation's product
D、The features of the organisation's product
A、Manhattan distance from the insect’s location to the hive.
B、Euclidean distance from the insect’s location to the hive.
C、Number of steps taken by the insect.
D、(无)
A、Vmax decreases, Km decreases
B、Vmax increases, Km increases
C、Vmax remains unchange, Km increases
D、Vmax remains unchange, Km decreases
E、Vmax decreases, Km increases
A、All allosteric enzymes have a regulatory subunit and a catalytic subunit.
B、The kinetic characteristics of allosteric enzyme are S-shaped curve rather than rectangular hyperbola.
C、The mechanism of allosteric activation is the same as that of enzyme activator.
D、Sulfonamides (磺胺类药物) work by allosteric inhibition.
E、It is an important way to rapidly regulate the enzyme content.
A、Phosphorylation/Dephosphorylation
B、Adenylation/Deadenylation
C、Methylation/Demethylation
D、Acetylation/Deacetylation
E、-SH / -S-S-
A、Irreversible inhibition
B、Competitive inhibition
C、Noncompetitive inhibition
D、Uncompetitive inhibition
E、Unable to determine
A、All proteins are enzymes.
B、Enzymes are biocatalysts.
C、Enzymes are synthesized inside cells, but can perform catalytic functions outside cells.
D、Enzymes have high specificity.
E、Enzymes can be inactivated by certain denaturing factors.
A、high catalytic efficiency
B、high specificity for substrates
C、can lower the activation energy of reactions
D、can't change the equilibrium of reactions
E、enzyme activity can be regulated
A、Tyr
B、Cys
C、Ser
D、Gly
E、Thr
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