11th Biology Unit 3 New Syllabus MCQs Short and Long Notes 2023

11th Biology Unit 3 Enzymes New Syllabus MCQs, short and long questions. 1st-year Biology unit-wise solved notes 2020-23 according to the smart syllabus. Download in pdf. All notes from past papers of fsc.

11th Biology Unit 3 New Syllabus Notes:

First look at the New Syllabus of chapter 3 Enzymes.

Introduction, Characteristics of enzymes, Mechanism of enzyme action (catalysis)

Inhibitors, Irreversible inhibitors, Reversible inhibitors (competitive & non-competitive

inhibitors) (Pg. 37-43)


Study of starch break down in germinating gram seeds.


Classwork: Fill in the blanks (i-v), True and false (i-v), Multiple choice questions (No)

Homework: Short questions (i, iii-v), Extensive questions ;(1, 3, 4)

1st Year Biology Enzymes New Syllabus MCQs:

If the non-protein part of enzyme is covalently bonded, it is called:

(SGD. GII, 2015) (RWP. GI, 2016) (DGK. 2019)

(A) Co-factor

(B) Activator

(C) Co-enzyme

(D) Prosthetic group

The detachable cofactors of an enzyme is known as:

(GRW, GII, 2014) (RWP. 2018)

A Activator

(B) Prosthetic group

(C) Coenzyme

(D) Apoenzyme

Enzyme that produces amino acids: (MLN. GI, 2015)

(A) Trypsin

(B) Erypsin

(C) Chymotrypsin

(D) Amino peptidases

The activation energy of the reactions is lowered by: (BWP. GI, AJK. GI, 2016)

(A) Co-enzyme

(B enzyme

(C) substrate

(D) product

Enzymes involved in respiration, are found in: (MLN. GI, 2014) (MLN. GI, 2016)

(A) Chloroplasts

(B) Ribosome

(C) Mitochondria

(D) Nucleus.

Biologically active proteins: (SWL. GI, 2017)

(A) Glycoproteins

(B) Enzymes

(C) Activators

(D) Inhibitors

Metals ions are related to: (GRW. GI, 2015)

(A) Coenzymes

(B) Vitamins

(C) Cofactors

(D) Substrate

The vitamins are essential raw material for the synthesis of: (SWL. GI, 2014) (LHR. GII, 2017)

(A) Activators

(B) Co-factors

(C) Co-enzymes

(D) Prosthetic group

Coenzymes are closely related to: (MLN. GI, 2016) (FBD. GI, 2019)

(A) Amino acids

(B) Non protein particles

(C) Vitamins

(D) Enzymes

The non-protein part of enzyme is known as: (GRW. GI, 2017)

(A) Activator

(B) Co-enzyme

(C) Co-factor

(D) Polypeptides

Enzyme lowers down the energy of: (GRW. GI, 2016)

(A) Kinetic

(B) Potential

(C) Activation

(D) ionic

Fsc Biology Chapter 3 Enzymes MCQs From Past Papers:

Lock and key model was proposed by: (FBD. GI, 2014) (RWP. GI, 2015) (MLN. GI, 2019)

(AEmil Fischer

(B) Koshland

(C) Rudolph Virchow

(D) Lorenz Oken

Enzymes that are integral part of ribosome are responsible for synthesis of:

(RWP. GII, 2016)

(A) Lipids

(B) Proteins

(C) Carbohydrates

(D) Nuceic acids

All enzymes are globular: (SGD GI. 2014)

(A) Carbohydrates

(B) Lipid

(C) Nucleic acid

(D) Protein

Reversible inhibitors form weak linkages with the: (SGD. GI, 2016)

(A) Enzyme

(B) Reactant

(C) Product

(D) Substrate

Induced fit model was proposed by: (LHR. GI, 2015) (SGD. GI, 2016)

(A) Emil Fischer

(B) Koshland

(C) Jenner

(D) Pasteur

Poisons like cyanide, antibiotics, anti-metabolites and some drugs are examples of:

(FBD. GI, 2016) (GRW.2018)

(A) Enzymes

(B) Inhibitors

(C) Coenzyme

(D) Holenzymes

All enzymes are proteins: (MLN. GI, 2017) (AJK. 2018)

(A) Fibrous

(B) Globular

(C) Non-enzymatic

(D) None

The catalytic activity of enzyme is restricted to a small portion of the enzyme, known as:

(MLN. GI, 2014)

(A) Active site

(B) Catalytic site

(C) Binding site

(D) Reacting site

11th Biology unit 3 short questions alp smart syllabus
Long Questions From Unit 3 According to ALP:

QI. Explain the mechanism of enzyme action in detail. (SGD. GI, 2015)

Q2. Write a detailed note on inhibitors and its different types.

(RWP. GI, 2015) (GRW. GI, 2016)

Q3. Explain how enzymes work in enzyme to enzyme chain or association?

(SWL. GI, 2015)

Q4. Describe the function of Enzymes present in Pancreatic Juice.

(MLN. GI, 2015) (GRW. GI, MLN. GI, 2016)

Q5. Describe characteristics of enzymes. (BWP. GI, 2014)

Download full chapter notes with MCQs, Short and Long Questions.

Leave a Comment