M C Q s D r i v e
03079682698
mcqsdrive@gmail.com
About
Contact

Contact Info

03079682698

mcqsdrive@gmail.com

Ad Banner

Biology 1525 MCQs [All-Courses]

thumb

Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

Who opposed the idea the cell is an empty space bounded by thick wall?
A Lorenz Oken
B Schwann
C Robert Brown
D Rudolph Virchow
Correct Answer: Robert Brown
If more substrate to already occurring enzymatic reaction is added and there is no effect on the rate of the reaction what is the form given to this situation___________?
A Saturation
B Denaturation
C Composition
D Inhibition
Correct Answer: Saturation
Factory of Ribosomal systhesis is__________?
A Cytoplasm
B Nucleus
C Nucleolus
D Endoplasmic reticulum
Correct Answer: Nucleolus
The active site of an enzyme______________?
A Never changes
B Forms no chemical bond with substrate
C Determined by structure and the specificity of the enzyme
D They are non specific in their action
Correct Answer: Determined by structure and the specificity of the enzyme
If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of____________________?
A Enzymes get denatured at higher substrate conc
B Rate of reaction is indirectly proportional to substrate concentration at this point
C All the active sites on enzyme molecule are occupied
D None of these
Correct Answer: All the active sites on enzyme molecule are occupied
Which statement is incorrect about Lock and Key Model________________?
A Specific enzyme can transform only a specific substrate
B Active site of an enzyme is a non flexible structure
C Active site does not change before during or even after the reaction
D It explains the mechanism of every chemical reaction
Correct Answer: It explains the mechanism of every chemical reaction
The rate of reaction is directly proportional to the concentration of an enzyme which statement is incorrect in this respect_________________?
A Increase in enzyme molecule increases the available active sites.
B This relation is for unlimited time period with unlimited enzyme concentration
C If the concentration is doubled the rate will become two fold.
D None of these.
Correct Answer: This relation is for unlimited time period with unlimited enzyme concentration
A group of ribosomes attached to mRNA is known as___________?
A Polymer
B Polypeptide
C Polysomes
D Monomer
Correct Answer: Polysomes
Cellular organelles related with H2O2 are___________?
A Glyoxisomes
B Lysosomes
C Peroxisomes
D Ribosomes
Correct Answer: Peroxisomes
A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called_________________?
A Active site
B Binding site
C Catalytic site
D Allosteric site
Correct Answer: Active site
03079682698
mcqsdrive@gmail.com

Copyright @ 2026 MCQsDrive . All Rights Reserved.