Zadanie 6
A dashed curve shows enzyme activity without an inhibitor. Which solid curve is expected after adding a reversible non-competitive inhibitor at a fixed concentration? A. Curve A B. Curve B C. Curve C D. Curve D
- Materiał graficzny
Allosteric inhibition of enzyme activity
Explain how reversible binding away from the active site changes enzyme conformation and reduces catalysis.
Tę umiejętność sprawdza 9 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 9 Otwórz w wyszukiwarce z filtrami
Zadanie 3d
Distinguish between competitive inhibition and pure non-competitive inhibition.
- Materiał graficzny
Zadanie 9
Molecular binding underlies both communication and metabolic regulation. (a) Describe complementary molecules in cell-signalling systems, with examples. (b) Explain causes and consequences of changes to enzyme active sites. (c) Outline how reversible changes…
Zadanie 7
The diagram summarizes regulation of isoleucine synthesis. Which mechanism accounts for the return connection? A. Competitive inhibition at the substrate-binding site B. Positive feedback that accelerates product formation C. Allosteric inhibition in negative…
- Materiał graficzny
Zadanie 9
Some environmental contaminants interfere with biological processes. (a) Describe how a persistent fat-soluble pesticide can become concentrated in predatory birds. (b) Compare and contrast competitive and non-competitive inhibition of enzymes. (c) Outline…
Zadanie 29
Assume the inhibitors follow the standard competitive and non-competitive models. Which deduction is supported by these curves? A. P competes at the substrate-binding site and can resemble the substrate B. Both compounds must have the same mechanism C. Q…
- Materiał graficzny
Zadanie 6
(a) Distinguish competitive inhibition from non-competitive inhibition. (b) Explain why atmospheric carbon dioxide can increase and how this threatens ocean ecosystems.
Zadanie 7
Enzymes, replication and evolutionary processes affect biological systems. (a) Outline, using graphs, effects of factors that influence enzyme activity. (b) Describe the functions of three named enzymes in DNA replication. (c) Explain speciation, including…
Zadanie 29
Which assignment best fits the curves? A. P: competitive; Q: no inhibition B. P: pure non-competitive; Q: competitive C. P: no inhibition; Q: pure non-competitive D. P: competitive; Q: pure non-competitive
- Materiał graficzny