Navigation Menu
Home
University Admissions
Public Sector
Private Sector
Admissions in Punjab
Admissions in KPK
Admissions in Sindh
Admissions in Balochistan
Admissions in AJK
Global Scholarships
Scholarships in USA
Scholarships in UK
Scholarships in Canada
Scholarships in Australia
Scholarships in Europe
Scholarships in Asia
Scholarships in Africa
Medical Colleges
Public Sector
Private Sector
Semi-Govt (NUMS)
Online Quiz
MDCAT Past Papers
MDCAT Practice Test
AFNS Intelligence Test
ISSB Intelligence Test
Blog
Latest Notices
Menu
Pak
Admissions
Home
All Open Admissions
Public Sector
Private Sector
Admissions in Punjab
Admissions in KPK
Admissions in Sindh
Admissions in Balochistan
Admissions in AJK
Scholarships
Scholarships in USA
Scholarships in UK
Scholarships in Canada
Scholarships in Australia
Scholarships in Europe
Scholarships in Asia
Scholarships in Africa
Medical and Dental Colleges
Public Sector
Private Sector
Semi-Govt (NUMS)
Online Quiz
MDCAT Past Papers
MDCAT Practice Test
AFNS Intelligence Test
ISSB Intelligence Test
Blog
Latest Notices
Home
/
Online Quiz
/
MDCAT Past Papers
/
Quiz 115
Mdcat-past-papers Quiz
Filters:
All questions
2281. All enzymes requires Mg to catalyse the reaction. Mg is called:
Co-Enzyme
Activator
Co-Factor
Allosteric site
2282. Non protein part required for proper and essential functioning of enzyme is called:
Allosteric factor
Co-Factor
Efficient factor
Extra factor
2283. Enzymes lower the activation energy by stabilizing the transition state of a metabolic reaction due to:
Changing conditions within the active site
Changing conditions within the protein framework
Rearranging the fatty acids in active site
Distorting the molecules in allosteric site
2284. Zinc ion is attached at the active site of the enzyme carboxypeptidase. The zinc ion functions as:
Co-enzyme molecule
An activator
Controller of allosteric site
An inhibitor
2285. Which enzyme is different from others?
Pepsin
Chymotrypsin
Trypsin
Lactase
2286. NAD is an important:
Enzyme
Hormones
Co-enzyme
Vitamins
2287. The active site of enzymes are composed of:
few nucleotides
few saccharides
few nucleosides
few amino acids
2288. The major enzymes involved in transfer of phosphate group from ATP to Glucose is:
Isomerase
Kinase
Dehydrogenase
Decarboxylase
2289. Induced fit model of enzyme activity suggests that an enzyme:
Cannot modify its active sites
Can bind to a single substrate
Can catalyse related reaction
Usually belongs to non-regulatory enzyme
2290. Enzymes are generally inactivated rapidly by exposure to UV high and also Alpha and beta rays because it alters the:
Quantity of enzyme
pH of enzyme
shape of enzymes
Temperature of enzyme
2291. A co-enzyme constitute about certain ---% portion of entire enzyme:
5%
1%
2%
3%
2292. Each enzyme has a dimple or groove at a specific side called:
Co-factor
Active site
non active site
Prosthetic group
2293. When substrate combines the active site of an enzyme it induces a conformation change that enable enzyme it to perform:
Analytic function
Metabolism
Meiosis
Mitosis
2294. Which statement about enzymes molecules is essential to the lock & key hypothesis?
have distinct shape
Enzyme molecules can be damaged by high pH value
Enzyme molecules can be damaged by its small portion
Enzyme molecules are restricted to its Allosteric site
2295. The catalytic activity of an enzyme is restricted to its small portion
Active site
Passive site
Regulation site
Allosteric site
2296. Enzymes work by lowering the ___ of the reactions they catalyze.
Kinetic energy
Activation energy
Heat energy
Potential energy
2297. Non protein but inorganic detachable σ-factor is called:
Activator
Prosthetic group
Co-enzyme
Apoenzyme
2298. Lock and key model for enzyme action proposed by Emil fischer suggests that:
Enzymes are unbiased for the substrate
Enzymes can modify their active sites
Enzymes are restricted to one reaction type
Enzyme can catalyze variety of reactions
2299. Enzymes work by lowering the ___ of the reactions they catalyze
Kinetic energy
Activation energy
Heat energy
Potential energy
2300. Select a regulatory enzyme:
Urease
Hexokinase
Maltase
Sucrase
Submit Quiz
-
Try Now
MDCAT Past Papers Free Online Quizzes
Rs. 1,799
Buy Now
Watch Touch Screen With Bluetooth
Country Wise Scholarships
🇵🇰
Pakistan's Scholarships
🇺🇸
USA's Scholarships
🇬🇧
UK's Scholarships
🇨🇦
Canada's Scholarships
🇨🇳
China's Scholarships
🇸🇦
Saudi Arabia's Scholarships
🇦🇪
UAE's Scholarships
🇲🇾
Malaysia's Scholarships
🇪🇺
Europe's Scholarships
🇰🇷
South Korea's Scholarships
See More
Rs. 5,994
Buy Now
Zero® ICON Smartwatch
Online Free Quiz
MDCAT Past Papers
MDCAT Practice Test
AFNS Intelligence Test
ISSB Intelligence Test
View All Quizzes →
Follow Us
Facebook
YouTube
WhatsApp
Instagram
Stay updated with latest news & updates
Aggregate Calculator
Calculate your MDCAT aggregate for MBBS admissions
Calculate Now →