Formation Of Peptide Bonds And Condensation Reactions Quiz

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Questions: 10 | Attempts: 195 | Updated: Aug 16, 2023

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Formation Of Peptide Bonds And Condensation Reactions Quiz - Quiz

A peptide bond is also called an amide bond. Play this informative quiz on the formation of the peptide bond and condensation reactions to gauge how well you know about it. The quiz contains various questions ranging from easy, medium, to a hard levels that will help you test your knowledge and would also enhance your knowledge pool. If you like the quiz, do share it with your friends and family. All the best!

Questions and Answers

1.

A peptide bonds connects
- A.
  
  3 Amino Acids
- B.
  
  2 Amino Acids
- C.
  
  4 Amino Acids
- D.
  
  6 Amino Acids
Correct Answer
B. 2 Amino Acids

Explanation
A peptide bond connects two amino acids. A peptide bond is a covalent bond formed between the carboxyl group of one amino acid and the amino group of another amino acid. This bond is important in the formation of proteins, as it links amino acids together to form a polypeptide chain.

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2.

What causes the peptide bonds of a polypeptide to be planar?
- A.
  
  Characteristics of the peptide bond's partial single bond
- B.
  
  Characteristics of the peptide bond's partial double bond
- C.
  
  Characteristics of the peptide bond's partial triple bond
- D.
  
  Characteristics of the peptide bond's complete triple bond
Correct Answer
B. Characteristics of the peptide bond's partial double bond

Explanation
The correct answer is "Characteristics of the peptide bond's partial double bond." Peptide bonds are formed between the amino acids in a polypeptide chain through a condensation reaction, resulting in the formation of a partial double bond between the carbonyl carbon and the nitrogen atom. This double bond character restricts rotation around the peptide bond, causing it to be planar. The planarity of the peptide bond is important for the overall structure and stability of proteins.

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3.

Peptide bond is sometimes also called
- A.
  
  Eurotide
- B.
  
  Hitide
- C.
  
  Eupeptide
- D.
  
  Karytide
Correct Answer
C. Eupeptide

Explanation
The correct answer is eupeptide because a peptide bond is formed when the carboxyl group of one amino acid reacts with the amino group of another amino acid, resulting in the formation of a covalent bond. The term "eupeptide" is not commonly used in scientific literature, but it can be inferred that it refers to a peptide bond that is formed between two amino acids.

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4.

Peptide bond is usually a
- A.
  
  Ionic bond
- B.
  
  Covalent bond
- C.
  
  Hydrogen bond
- D.
  
  None of the above
Correct Answer
B. Covalent bond

Explanation
A peptide bond is a covalent bond that forms between the carboxyl group of one amino acid and the amino group of another amino acid during protein synthesis. Covalent bonds involve the sharing of electrons between atoms, and in the case of a peptide bond, this sharing occurs between the carbon and nitrogen atoms of the amino acids. Ionic bonds involve the transfer of electrons between atoms, while hydrogen bonds are weaker interactions between a hydrogen atom and an electronegative atom. Therefore, the correct answer is a covalent bond.

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5.

The reaction through which peptide bond is formed is called
- A.
  
  Redox reaction
- B.
  
  Oxidation reaction
- C.
  
  Condensation reaction
- D.
  
  None of the above
Correct Answer
C. Condensation reaction

Explanation
The reaction through which a peptide bond is formed is called a condensation reaction. In this reaction, two amino acids join together, releasing a water molecule as a byproduct. This process involves the removal of a hydroxyl group from one amino acid and a hydrogen atom from the other amino acid, resulting in the formation of a peptide bond between the two amino acids. Therefore, the correct answer is condensation reaction.

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6.

In a peptide bond, the hydroxyl group is substituted by
- A.
  
  Carbon
- B.
  
  Oxygen
- C.
  
  Hydrogen
- D.
  
  Nitrogen
Correct Answer
D. Nitrogen

Explanation
In a peptide bond, the hydroxyl group is substituted by nitrogen. This is because a peptide bond is formed between the carboxyl group of one amino acid and the amino group of another amino acid. The carboxyl group contains a carbon atom, an oxygen atom, and a hydroxyl group. During the formation of a peptide bond, the hydroxyl group is removed from the carboxyl group and is replaced by a nitrogen atom from the amino group of the other amino acid. This nitrogen atom then forms a covalent bond with the carbon atom, resulting in the formation of a peptide bond.

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7.

How many amino acids does a dipeptide contains?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
Correct Answer
B. 2

Explanation
A dipeptide is a molecule formed by the combination of two amino acids through a peptide bond. Therefore, it contains two amino acids.

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8.

Macropeptides are made up of
- A.
  
  Less than 100 amino acids
- B.
  
  More than 100 amino acids
- C.
  
  More than 200 amino acids
- D.
  
  None of the above
Correct Answer
B. More than 100 amino acids

Explanation
Macropeptides are composed of more than 100 amino acids. Amino acids are the building blocks of proteins, and macropeptides are a type of protein. The term "macro" indicates that these peptides are relatively large in size, consisting of a significant number of amino acids. Therefore, the correct answer is "More than 100 amino acids."

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9.

What is the wavelength of absorption for a peptide bond?
- A.
  
  250-280 nm
- B.
  
  190–230 nm
- C.
  
  300- 350 nm
- D.
  
  None of the above
Correct Answer
B. 190–230 nm

Explanation
The correct answer is 190-230 nm. The wavelength of absorption for a peptide bond falls within this range. This is because peptide bonds contain a chromophore called the amide group, which absorbs light in the ultraviolet region. The absorption of light by the peptide bond is due to the presence of the double bond character in the C-N bond, which allows for electronic transitions to occur. Therefore, the wavelength of absorption for a peptide bond is in the range of 190-230 nm.

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10.

Peptide is a Greek word meaning
- A.
  
  Eating
- B.
  
  Excretion
- C.
  
  Digested
- D.
  
  None of the above
Correct Answer
C. Digested

Explanation
The correct answer is "Digested" because the word "peptide" is derived from the Greek word "peptein," which means "to digest." Peptides are short chains of amino acids that are formed during the digestion of proteins in the body. Therefore, "Digested" is the most appropriate option that aligns with the meaning of the word "peptide."

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Amit Mangal |Content Moderator |

Formation Of Peptide Bonds And Condensation Reactions Quiz

A peptide bonds connects

What causes the peptide bonds of a polypeptide to be planar?

Peptide bond is sometimes also called

Peptide bond is usually a

The reaction through which peptide bond is formed is called

In a peptide bond, the hydroxyl group is substituted by

How many amino acids does a dipeptide contains?

Macropeptides are made up of

What is the wavelength of absorption for a peptide bond?

Peptide is a Greek word meaning