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MDCAT Chemistry Macromolecules Online Test

Mustansar KhanLast Updated: June 16, 2025

Chemistry Carboxylic Acid MCQS Online Test

MDCAT Chemistry Carboxylic Acid Chapter Online Test

Total Questions:	50
Time Allowed:	30 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Chemistry Online Test Interview Questions about Chemisttry All Universities Entrance Test Recruitments Tests

MDCAT Chemistry Carboxylic Acid Test

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1. What is the inactive form of an enzyme called?

Zymogen

Apoenzyme

Cofactor

Coenzyme

2. What is the main function of enzymes?

To store energy

To transport oxygen

To speed up chemical reactions

To act as structural components

3. Which level of protein structure is determined by hydrogen bonding between nearby amino acids?

Secondary

Primary

Tertiary

Quaternary

4. Which of the following is a fibrous protein?

Myosin

Hemoglobin

Insulin

Albumin

5. What is the region where an enzyme binds its substrate?

Binding domain

Active site

Protein core

Allosteric site

6. Which of the following affects enzyme activity?

Cell size

Substrate concentration

DNA sequence

Color of enzyme

7. Which of the following enzymes functions in the stomach?

Amylase

Pepsin

Lipase

Trypsin

8. What is the primary structure of a protein?

Interaction between polypeptides

Sequence of amino acids

Folding of protein

3D conformation

9. What are the building blocks of proteins?

Fatty acids

Amino acids

Nucleotides

Sugars

10. What kind of protein is collagen?

Enzymatic

Globular

Hormonal

Fibrous

11. Which vitamin is a coenzyme for many enzymes?

Vitamin C

Vitamin D

Vitamin B complex

Vitamin K

12. Which of the following is an example of a globular protein?

Hemoglobin

Keratin

Myosin

Collagen

13. What is the role of enzymes in metabolism?

They slow down reactions

They store energy

They regulate reaction speed

They transport waste

14. What determines the sequence of amino acids in a protein?

DNA

Ribosome structure

Enzyme action

RNA polymerase

15. Which of the following enzymes breaks down proteins?

Pepsin

Lipase

DNA polymerase

Amylase

16. How many different amino acids are used in the synthesis of proteins in the human body?

17. Which property of enzymes makes them highly specific?

Their charge

Their shape

Their mass

Their solubility

18. Which of the following is a protein hormone?

Estrogen

Cortisol

Insulin

Testosterone

19. Which of the following are macromolecules composed of amino acids?

Nucleic acids

Lipids

Carbohydrates

Proteins

20. Which factor does NOT affect enzyme activity?

Color of enzyme

Temperature

Substrate concentration

21. Which component is not found in all amino acids?

Amino group

Phosphate group

Carboxyl group

Side chain (R group)

22. Which type of protein helps defend the body against pathogens?

Antibody

Transport

Structural

Enzymatic

23. Which of the following proteins has a structural role?

Pepsin

Hemoglobin

Keratin

Insulin

24. What is the main role of the R group in amino acids?

Participates in peptide bonding

Provides acidity

Determines identity and properties of the amino acid

Stabilizes enzymes

25. Which type of bond links amino acids in a protein?

Ester bond

Glycosidic bond

Peptide bond

Hydrogen bond

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26. Which of the following is true about enzymes?

They lower the activation energy

They are consumed during the reaction

They increase the temperature of the system

They alter the equilibrium of the reaction

27. What happens when an enzyme is exposed to a pH far from its optimum?

It dissolves

It becomes inactive

It denatures

It speeds up

28. Which bond is broken during the hydrolysis of proteins?

Hydrogen bond

Peptide bond

Disulfide bond

Ionic bond

29. Which type of protein is insulin?

Hormonal protein

Defensive protein

Structural protein

Transport protein

30. Which of the following best describes denaturation?

Loss of secondary and tertiary structure

Protein digestion

Protein synthesis

Increase in molecular weight

31. Which of the following is not a function of proteins?

Genetic information storage

Catalysis

Energy storage

Transport

32. What is the quaternary structure of a protein?

The 3D shape of a single polypeptide

The sequence of amino acids

The interaction between multiple polypeptide chains

A random coil structure

33. Which of the following best describes enzymes?

Storage proteins

Transport proteins

Catalytic proteins

Structural proteins

34. Which protein is responsible for muscle contraction?

Actin

Amylase

Hemoglobin

Insulin

35. Which of the following is a cofactor often required by enzymes?

Fats

Water

Glucose

Metal ions

36. Which of the following determines the function of a protein?

Its primary structure

Its DNA sequence

Its amino acid composition only

Its solubility

37. What is the function of ribosomes in protein synthesis?

Break down proteins

Assemble amino acids into proteins

Transport proteins

Store amino acids

38. Which macromolecule category includes enzymes?

Proteins

Lipids

Carbohydrates

Nucleic acids

39. Which enzyme is present in saliva and begins the digestion of carbohydrates?

Pepsin

Trypsin

Amylase

Lipase

40. Which element is unique to proteins compared to carbohydrates and fats?

Nitrogen

Oxygen

Hydrogen

Carbon

41. Which protein is found abundantly in red blood cells?

Myosin

Hemoglobin

Actin

Collagen

42. What happens to an enzyme when its shape is changed?

It becomes more efficient

It changes its DNA

It becomes inactive

It duplicates

43. Which enzyme breaks down fats in the human body?

Pepsin

Amylase

Protease

Lipase

44. What is denaturation of a protein?

Breakdown of amino acids

Synthesis of protein

Unfolding of protein structure

Formation of peptide bonds

45. What happens in the induced fit model of enzyme action?

The enzyme slightly changes shape to bind the substrate

The enzyme permanently changes shape

The substrate is broken into multiple enzymes

The enzyme and substrate fit perfectly like a lock and key

46. What is the optimum pH for most enzymes in the human body?

47. What is the three-dimensional structure of a protein called?

Linear structure

Tertiary structure

Secondary structure

Primary structure

48. Which enzyme breaks down hydrogen peroxide in cells?

Amylase

Pepsin

Urease

Catalase

49. What is the effect of high temperature on most enzymes?

Freezes activity

Activates them

Denatures them

Enhances bonding

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Mustansar KhanLast Updated: June 16, 2025

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MDCAT Chemistry Macromolecules Online Test

Chemistry Carboxylic Acid MCQS Online Test

MDCAT Chemistry Carboxylic Acid Chapter Online Test

MDCAT Chemistry Carboxylic Acid Test

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Chemistry Carboxylic Acid MCQS Online Test

MDCAT Chemistry Carboxylic Acid Chapter Online Test

MDCAT Chemistry Carboxylic Acid Test

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