Explain how a final product inhibits an earlier pathway step, using isoleucine synthesis as an example.
Tę umiejętność sprawdzają 4 zadania wzorowane na arkuszach IB z lat 2023–2025.
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…
This pathway is controlled by end-product feedback inhibition. Which interaction provides that control? A. Threonine activates every molecule of isoleucine B. Intermediate Q permanently removes all later enzymes C. E5 inhibits threonine only after threonine…
(a) Outline the role of ADH in maintaining water balance. (b) Explain how an end product can regulate the pathway that makes it. (c) Describe hormonal feedback involved in preparation for pregnancy, maintenance of pregnancy and childbirth.
A pathway converts substrate A through several steps into product Z. These constructed data show the first enzyme’s activity when Z is added. Which conclusion follows? A. Z is required for the enzyme to have any activity B. Z reduces activity at lower…
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