When Varying the Substrate Concentration at a Fixed Concentration of Enzyme

question 72

Multiple Choice

When varying the substrate concentration at a fixed concentration of enzyme it is observed that at low concentrations of substrate the reaction is ________,while at high concentrations of substrate the reaction is ________.

• A)maximal;initial
• B)initial;maximal
• C)second order;first order
• D)first order;second order
• E)first order;zero order

---

Definitions:

Intercostal Muscles

Muscles located between the ribs that play a role in the mechanics of breathing.

Atmospheric Pressure

The pressure exerted by the weight of the atmosphere above a specific point, affecting weather and climate conditions.

Respiratory Rhythm

The regular or irregular pattern of breathing controlled by neural mechanisms in the brain.

Medulla Oblongata

The lower portion of the brainstem, regulating vital functions such as breathing, heart rate, and blood pressure.