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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.
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MDCAT Chemistry Carboxylic Acid Test

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

Active site

Binding domain

Protein core

Allosteric site

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

Lipids

Carbohydrates

Proteins

Nucleic acids

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

Activates them

Denatures them

Freezes activity

Enhances bonding

4. Which of the following enzymes breaks down proteins?

DNA polymerase

Lipase

Pepsin

Amylase

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

Disulfide bond

Peptide bond

Hydrogen bond

Ionic bond

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

Antibody

Structural

Enzymatic

Transport

7. Which macromolecule category includes enzymes?

Lipids

Carbohydrates

Proteins

Nucleic acids

8. Which of the following is a fibrous protein?

Hemoglobin

Myosin

Albumin

Insulin

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

Nitrogen

Oxygen

Carbon

Hydrogen

10. 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

11. What is the main function of enzymes?

To transport oxygen

To store energy

To speed up chemical reactions

To act as structural components

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

Hydrogen bond

Glycosidic bond

Ester bond

Peptide bond

13. What is the primary structure of a protein?

Interaction between polypeptides

Folding of protein

Sequence of amino acids

3D conformation

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

Catalysis

Energy storage

Transport

Genetic information storage

15. Which of the following best describes denaturation?

Protein digestion

Loss of secondary and tertiary structure

Protein synthesis

Increase in molecular weight

16. Which factor does NOT affect enzyme activity?

Temperature

Substrate concentration

Color of enzyme

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

18. Which of the following best describes enzymes?

Catalytic proteins

Transport proteins

Storage proteins

Structural proteins

19. What are the building blocks of proteins?

Fatty acids

Amino acids

Sugars

Nucleotides

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

Its solubility

Its DNA sequence

Its primary structure

Its amino acid composition only

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

Enzyme action

Ribosome structure

RNA polymerase

DNA

22. What is the quaternary structure of a protein?

The interaction between multiple polypeptide chains

The 3D shape of a single polypeptide

The sequence of amino acids

A random coil structure

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

Determines identity and properties of the amino acid

Provides acidity

Participates in peptide bonding

Stabilizes enzymes

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

Linear structure

Secondary structure

Primary structure

Tertiary structure

25. Which enzyme breaks down hydrogen peroxide in cells?

Amylase

Pepsin

Urease

Catalase

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

Zymogen

Coenzyme

Cofactor

Apoenzyme

27. What is denaturation of a protein?

Breakdown of amino acids

Formation of peptide bonds

Unfolding of protein structure

Synthesis of protein

28. Which protein is responsible for muscle contraction?

Actin

Insulin

Amylase

Hemoglobin

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

It becomes inactive

It speeds up

It dissolves

It denatures

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

Trypsin

Pepsin

Amylase

Lipase

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

Primary

Quaternary

Tertiary

Secondary

32. 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

33. Which type of protein is insulin?

Defensive protein

Structural protein

Transport protein

Hormonal protein

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

Pepsin

Keratin

Insulin

Hemoglobin

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

Lipase

Amylase

Protease

Pepsin

36. Which of the following affects enzyme activity?

Substrate concentration

DNA sequence

Cell size

Color of enzyme

37. What is the role of enzymes in metabolism?

They slow down reactions

They store energy

They transport waste

They regulate reaction speed

38. What kind of protein is collagen?

Enzymatic

Globular

Hormonal

Fibrous

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

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

Carboxyl group

Side chain (R group)

Phosphate group

Amino group

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

Water

Metal ions

Fats

Glucose

42. Which vitamin is a coenzyme for many enzymes?

Vitamin C

Vitamin D

Vitamin B complex

Vitamin K

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

Lipase

Amylase

Pepsin

Trypsin

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

Hemoglobin

Actin

Myosin

Collagen

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

It becomes more efficient

It changes its DNA

It duplicates

It becomes inactive

46. Which property of enzymes makes them highly specific?

Their charge

Their mass

Their shape

Their solubility

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

Transport proteins

Assemble amino acids into proteins

Store amino acids

Break down proteins

48. Which of the following is a protein hormone?

Cortisol

Testosterone

Insulin

Estrogen

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

Hemoglobin

Keratin

Myosin

Collagen

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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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