Which among the following is incorrect about enzymes?

Enzymes are proteins or non-proteins that act as bio-catalysts

Holoenzymes comprise of a prosthetic group and an apoenzyme

Prosthetic group can be either co-factors or co-enzymes

Cutting a potato leads to the breakage of bonds in the enzymes present in it

Which among the following is incorrect about denaturation?

Proteins are stereospecific to many enzymes

Proteins have a unique structure which might get disrupted with change in pH and temperature

Secondary, tertiary and quaternary structure is lost

Proteins still retain their characteristics as they don’t lose their primary structure

Proteins are stereospecific to many enzymes

Tertiary structure of protein is formed by __________

Multiple chains of polypeptides held together by hydrogen bonds

Sulphide linkages between different amino acids

Multiple chains of polypeptides held together by hydrogen bonds

Peptide linkages between two amino acids

Hydrogen bond formed by helical or pleated structure

Which among the following statements is incorrect about classification of protein?

Fibrous proteins result when long peptide chains run parallel and are held by hydrogen and sulphide linkages

Globular structures result when chain of polypeptide coil around themselves to form a globe like structure

Linear structure of amino acids in a polypeptide is called primary structure

Collagen is an example of globular protein

Which among the following is incorrect about amino acids?

Amino acids are usually represented by a three letter symbol or a one letter convention

Amino acids are those that contain an amine group and a carboxylic group

Base on the position of amino group with respect to the carboxylic group, amino groups are classified as α-, β-, γ-, δ- amino acids

Proteins on hydrolysis produce α-, β-, γ-, δ- amino acids

Amino acids are usually represented by a three letter symbol or a one letter convention

Explore topic-wise MCQs in Biology.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

1.	Which among the following is incorrect about enzymes?
A.	Enzymes are proteins or non-proteins that act as bio-catalysts
B.	Holoenzymes comprise of a prosthetic group and an apoenzyme
C.	Prosthetic group can be either co-factors or co-enzymes
D.	Cutting a potato leads to the breakage of bonds in the enzymes present in it
Answer» E.

Discussion

2.	Which among the following is incorrect about denaturation?
A.	Proteins have a unique structure which might get disrupted with change in pH and temperature
B.	Secondary, tertiary and quaternary structure is lost
C.	Proteins still retain their characteristics as they don’t lose their primary structure
D.	Proteins are stereospecific to many enzymes
Answer» D. Proteins are stereospecific to many enzymes

Discussion

3.	Tertiary structure of protein is formed by __________
A.	Sulphide linkages between different amino acids
B.	Multiple chains of polypeptides held together by hydrogen bonds
C.	Peptide linkages between two amino acids
D.	Hydrogen bond formed by helical or pleated structure
Answer» B. Multiple chains of polypeptides held together by hydrogen bonds

Discussion

4.	Which among the following statements is incorrect about classification of protein?
A.	Fibrous proteins result when long peptide chains run parallel and are held by hydrogen and sulphide linkages
B.	Globular structures result when chain of polypeptide coil around themselves to form a globe like structure
C.	Linear structure of amino acids in a polypeptide is called primary structure
D.	Collagen is an example of globular protein
Answer» E.

Discussion

5.	Proteins are polymers of amino acids that are connected by __________
A.	Peptide linkage
B.	Glycosidic linkage
C.	Phosphodiester linkage
D.	Vanderwaal linkages
Answer» B. Glycosidic linkage

Discussion

6.	Non-essential amino acids are those amino acids that our body doesn’t contain and acquires it through food.
A.	True
B.	False
Answer» C.

Discussion

7.	Zwitter ion in aqueous solution is __________
A.	Amphoteric
B.	Acidic
C.	Basic
D.	Anomalous
Answer» E.

Discussion

8.	Which among the following is incorrect about amino acids?
A.	Amino acids are those that contain an amine group and a carboxylic group
B.	Base on the position of amino group with respect to the carboxylic group, amino groups are classified as α-, β-, γ-, δ- amino acids
C.	Proteins on hydrolysis produce α-, β-, γ-, δ- amino acids
D.	Amino acids are usually represented by a three letter symbol or a one letter convention
Answer» D. Amino acids are usually represented by a three letter symbol or a one letter convention

Discussion

9.	20 amino acids undergo different permutations and combinations to form a large number of proteins.
A.	True
B.	False
Answer» B. False

Discussion

Explore topic-wise MCQs in Biology.

Which among the following is incorrect about enzymes?

Which among the following is incorrect about denaturation?

Tertiary structure of protein is formed by __________

Which among the following statements is incorrect about classification of protein?

Proteins are polymers of amino acids that are connected by __________

Non-essential amino acids are those amino acids that our body doesn’t contain and acquires it through food.

Zwitter ion in aqueous solution is __________

Which among the following is incorrect about amino acids?

20 amino acids undergo different permutations and combinations to form a large number of proteins.