Dipeptide Definition, Formation and Structure Quiz

By Amit Mangal
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Dipeptide Definition, Formation And Structure  Quiz - Quiz

Play this informative quiz to see how well you know about dipeptides, formation, and structure. Dipeptides are organic compounds that form essential biomolecules for the functioning of our body. The quiz contains various questions ranging from easy, medium, to a hard level that will not only test your knowledge about it but will enhance your knowledge. If you like the quiz, do share it with your friends and peers. All the best!


Questions and Answers
  • 1. 

    Dipeptide is derived from

    • A.

      4 amino acids

    • B.

      2 amino acids

    • C.

      6 amino acids

    • D.

      5 amino acids

    Correct Answer
    B. 2 amino acids
    Explanation
    A dipeptide is a molecule that consists of two amino acids joined together by a peptide bond. Therefore, the correct answer is "2 amino acids" because a dipeptide is specifically derived from the combination of two amino acids.

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  • 2. 

    Which of the following is a dipeptide?

    • A.

      Amylin

    • B.

      Glucagon

    • C.

      Aspartame

    • D.

      α-Amanitin

    Correct Answer
    C. Aspartame
    Explanation
    Aspartame is a dipeptide because it is composed of two amino acids, aspartic acid and phenylalanine, joined together by a peptide bond. It is commonly used as an artificial sweetener in various food and beverage products.

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  • 3. 

    Aspartame is an example of

    • A.

      Anti-depressant

    • B.

      Pain killer

    • C.

      Artificial Sweetener

    • D.

      None of the above

    Correct Answer
    C. Artificial Sweetener
    Explanation
    Aspartame is a type of artificial sweetener. It is commonly used as a sugar substitute in various food and drink products. It is known for its intense sweetness, which makes it a popular choice for those looking to reduce their sugar intake. Aspartame is not an antidepressant or a painkiller, so the correct answer is artificial sweetener.

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  • 4. 

    The dipeptide found in the brain and muscles of mammals is

    • A.

      Glorine

    • B.

      Homoanserine 

    • C.

      Kyotorphin

    • D.

      Aspartame

    Correct Answer
    B. Homoanserine 
    Explanation
    Homoanserine is the correct answer because it is a dipeptide that is found in the brain and muscles of mammals. It is formed by the combination of two amino acids, homoserine and alanine. This dipeptide plays a role in various physiological processes in the body and is involved in neurotransmission and muscle function.

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  • 5. 

    Dipeptides activate which cells in the stomach to secrete gastrin?

    • A.

      Alpha Cells

    • B.

      T- cells

    • C.

      B - cells

    • D.

      G- cells

    Correct Answer
    D. G- cells
    Explanation
    G-cells are the cells in the stomach that are activated by dipeptides to secrete gastrin. Gastrin is a hormone that plays a crucial role in regulating the secretion of gastric acid and the motility of the stomach. When dipeptides are present in the stomach, they stimulate G-cells to release gastrin, which then acts on the parietal cells to increase the production of gastric acid. This acid helps in the digestion of proteins and other nutrients in the stomach. Therefore, G-cells are responsible for the secretion of gastrin in response to dipeptides.

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  • 6. 

    Which dipeptides are formed as side products in peptide synthesis?

    • A.

      Diphenylalanine 

    • B.

      Diketopiperazines

    • C.

      Barettin

    • D.

      Xenortides

    Correct Answer
    B. Diketopiperazines
    Explanation
    Diketopiperazines are formed as side products in peptide synthesis. Diketopiperazines are cyclic dipeptides that can be produced when two amino acids react to form a peptide bond, but the reaction is incomplete. These side products can be formed due to various factors such as reaction conditions, steric hindrance, or the presence of impurities. Diketopiperazines are commonly observed in peptide synthesis and their presence can affect the yield and purity of the desired peptide product.

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  • 7. 

    Dipeptides are produced from

    • A.

      Amino acids

    • B.

      Oligopeptides

    • C.

      Polypeptides

    • D.

      Nucleic acids

    Correct Answer
    C. Polypeptides
    Explanation
    Polypeptides are long chains of amino acids bonded together, and they can be broken down into smaller units called dipeptides. Therefore, it is logical to conclude that dipeptides are produced from polypeptides. Amino acids are the building blocks of both polypeptides and proteins, but they are not directly involved in the production of dipeptides. Oligopeptides are short chains of amino acids, but they are not specifically mentioned in relation to the production of dipeptides. Nucleic acids, such as DNA and RNA, are not directly involved in the production of dipeptides.

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  • 8. 

    Which dipeptide is found in the skeletal muscles and brains of mammals?

    • A.

      Kyotorphin

    • B.

      Anserine 

    • C.

      Balenine

    • D.

      Anserine 

    Correct Answer
    A. Kyotorphin
    Explanation
    The dipeptide found in the skeletal muscles and brains of mammals is Kyotorphin. Kyotorphin is a naturally occurring dipeptide composed of L-tyrosine and L-arginine. It has been identified in the central nervous system, including the brains of mammals, and is also present in skeletal muscles. Kyotorphin is known for its potential role in pain modulation and has been studied for its analgesic (pain-relieving) properties.

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  • 9. 

    Which of the following is a neuroactive dipeptide?

    • A.

      Barettine

    • B.

      Kyotorphin

    • C.

      Glorin

    • D.

      Xenortide

    Correct Answer
    B. Kyotorphin
    Explanation
    Kyotorphin is a neuroactive dipeptide. A dipeptide is a molecule composed of two amino acids joined together by a peptide bond. Kyotorphin is a specific dipeptide that has been found to have neuroactive properties, meaning it can affect the nervous system. It has been studied for its potential analgesic and neuroprotective effects, making it a relevant option in the context of neuroactive dipeptides. Barettine, Glorin, and Xenortide are not known to have neuroactive properties.

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  • 10. 

    Which of the following is a chemotactic dipeptide for the slime-mould Polysphondylium violaceum? 

    • A.

      Kyotorphin

    • B.

      Glorin

    • C.

      Xenortide

    • D.

      Carosine

    Correct Answer
    B. Glorin
    Explanation
    Glorin is the correct answer because it is a chemotactic dipeptide for the slime-mould Polysphondylium violaceum. This means that Glorin acts as a signaling molecule that attracts the slime-mould towards it. It is likely that Polysphondylium violaceum has specific receptors that recognize and respond to Glorin, causing the slime-mould to move towards the source of Glorin. The other options, Kyotorphin, Xenortide, and Carosine, are not chemotactic dipeptides for Polysphondylium violaceum.

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Amit Mangal |Content Moderator |
Amit, a Senior Quiz Moderator at ProProfs.com, utilizes his profound content expertise to design captivating and precise quizzes. His unwavering commitment to maintaining quiz excellence resonates seamlessly with ProProfs.com's vision of fostering knowledge enhancement. Amit holds a strong background in creating quizzes on history, politics, current affairs, etc.

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  • Current Version
  • Jan 30, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 05, 2022
    Quiz Created by
    Amit Mangal
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