GPAT Practice Quiz

Question 1

In Michaelis-Menten kinetics, the Michaelis constant (Km) is defined as the substrate concentration at which:

Accepted Answer

the reaction velocity is half of Vmax

Question 2

For an enzyme following Michaelis-Menten kinetics, what is the effect of increasing enzyme concentration while keeping substrate concentration constant and non-limiting?

Accepted Answer

Vmax increases proportionally

Question 3

An enzyme obeys Michaelis-Menten kinetics with Km = 2 mM. At what substrate concentration will the initial velocity be 80% of Vmax?

Accepted Answer

8 mM

Question 4

For the mechanism E + S ⇌ ES → E + P, which expression correctly gives the Michaelis constant Km?

Accepted Answer

(k-1 + k2)/k1

Question 5

For the mechanism E + S ⇌ ES → E + P, if k-1 is much greater than k2, Km is best approximated by:

Accepted Answer

k-1/k1

⚠️ Hidden Problematic Habits & Patterns in Exams	✅ How ProSyllabus Analytics Identifies Issues and Provides Tailored Solutions
Focusing too much on hard questions while missing easy, high-scoring ones.	Allows you to see missed easy questions with time spent and revisit frequency details.
Missed correct answers indicate potential oversight or skipped review.	Highlights unmarked correct answers to support a thorough review.
Excessive time spent on specific questions suggests poor time management.	Provides insights on optimal time distribution for improved focus.

GPAT

AI-Powered Mock Test Analytics

Mock tests aren’t just about scores—they help uncover bad habits. Many students waste time on hard questions with the same marks as easier ones. Fix this with our platform: identify inefficiencies, optimize your strategy, and elevate your performance.