Pharmacology Quiz #1: Enzymes Kinetics

Pharmacology Quiz #1: Enzymes Kinetics

1. A researcher is studying a new enzyme and observes that, at a fixed enzyme concentration, the rate of the reaction increases with substrate concentration until it reaches a maximum rate (Vmax). At this point, further increases in substrate concentration do not increase the reaction rate. Which of the following best explains why the reaction rate does not increase beyond this point? 

Question 1 of 5

2. In an experiment involving enzyme kinetics, an inhibitor is added that increases both the apparent Km and Vmax of the enzyme. Which of the following types of inhibition is this inhibitor likely exerting? 

Question 2 of 5

3. A student is studying an enzyme involved in nucleotide metabolism. When the concentration of ATP is significantly increased, the enzyme's activity decreases. This regulation mechanism is best described as: 

Question 3 of 5

4. An enzyme shows a Km of 5 mM for its substrate. Which of the following best describes the interpretation of this Km value? 

Question 4 of 5

5. In the study of an enzyme-catalyzed reaction, it is found that the presence of a certain molecule decreases the Vmax of the enzyme without affecting the Km. This molecule is most likely acting as which of the following? 

Question 5 of 5


 

¡Por tiempo limitado!

Unete a nuestro boletín mensual y obtén todos nuestros talleres USMLE/ECFMG ¡GRATIS! (+100 videos)

¡Únete a nuestra comunidad de IMGs!

¡Obtén actualizaciones mensuales USMLE y ECFMG, además, obtén un taller USMLE gratis al instante!

"Taller 01: ¿Qué es el USMLE?”

Taller Gratuito USMLE

Este taller proporciona un análisis en profundidad de todos los exámenes USMLE, consejos para tomar exámenes y cómo estudiar de manera efectiva.

OFERTA POR TIEMPO LIMITADO

Especialista ECFMG: Dr. Carla Rebeca Lainez Casal

Facultad de Medicina: Universidad Catholica de Santiago de Guayaquil
ECFMG Certification date: October 13, 2022.
Residency: 2023 Internal Medicine Applicant
+1 7542724970