What Do You Know About Ketones?

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| By Zlatan Aleksic
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Zlatan Aleksic
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  • 1/10 Questions

    Where are Ketone Bodies formed?

    • Kidneys
    • Spleen
    • Liver
    • Pancreas
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About This Quiz

Ketones are body products that everyone has in their bodies in different concentrations. You have opportunity to challenge yourself with this interesting questions and maybe to learn something new! Good luck!

What Do You Know About Ketones? - Quiz

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  • 2. 
    What do Ketones and Aldehydes contain? - ProProfs

    What do Ketones and Aldehydes contain?

    • Carbonyl group

    • Fluorinated compounds

    • Methylene group

    • Amides

    Correct Answer
    A. Carbonyl group
    Explanation
    Ketones and aldehydes contain a carbonyl group. A carbonyl group is a functional group composed of a carbon atom double-bonded to an oxygen atom. In ketones, the carbonyl group is located in the middle of the carbon chain, while in aldehydes, it is located at the end of the chain. The presence of the carbonyl group gives ketones and aldehydes their characteristic chemical and physical properties.

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  • 3. 
    What does old German word "Aketon" (from which word Ketone is derived) means? - ProProfs

    What does old German word "Aketon" (from which word Ketone is derived) means?

    • Fat

    • Acetone

    • Alcohol

    • Bond

    Correct Answer
    A. Acetone
    Explanation
    The old German word "Aketon" means Acetone. Acetone is a colorless liquid that is commonly used as a solvent. It is also produced in the body through the breakdown of fats. The word "Ketone" is derived from the old German word "Aketon" because Acetone is a type of ketone.

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  • 4. 
    What needs to happen before Ketone Body synthesis? - ProProfs

    What needs to happen before Ketone Body synthesis?

    • Gluconeogenesis

    • TAG synthesis

    • Beta-oxidation

    • Glycolysis

    Correct Answer
    A. Beta-oxidation
    Explanation
    Before Ketone Body synthesis can occur, Beta-oxidation needs to happen. Beta-oxidation is the process by which fatty acids are broken down in the mitochondria to produce acetyl-CoA, which is a precursor for Ketone Body synthesis. This process involves the sequential removal of two-carbon units from the fatty acid chain, producing acetyl-CoA molecules. These acetyl-CoA molecules can then be used for the synthesis of Ketone Bodies in the liver during periods of prolonged fasting or low carbohydrate intake.

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  • 5. 
    Where is the enzyme HMG-CoA only found? - ProProfs

    Where is the enzyme HMG-CoA only found?

    • Muscle cells

    • Adipocytes

    • Nervous tissue

    • Hepatocytes

    Correct Answer
    A. Hepatocytes
    Explanation
    HMG-CoA is an enzyme involved in the synthesis of cholesterol. It is primarily found in hepatocytes, which are liver cells. The liver is responsible for producing and regulating cholesterol levels in the body. Therefore, it makes sense that HMG-CoA would be predominantly found in hepatocytes, where it can carry out its function in cholesterol synthesis.

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  • 6. 
    What is generated in beta-oxidation that inhibits the TCA cycle? - ProProfs

    What is generated in beta-oxidation that inhibits the TCA cycle?

    • FADH2

    • NADH

    • FAD+

    • NAD+

    Correct Answer
    A. NADH
    Explanation
    NADH is generated in beta-oxidation, and it inhibits the TCA cycle. NADH is a high-energy molecule that carries electrons and is produced during the breakdown of fatty acids. In the TCA cycle, NADH is an important electron carrier that donates its electrons to the electron transport chain for ATP production. However, when there is an excess of NADH, it can feedback inhibit the TCA cycle, slowing down the production of ATP. This inhibition helps regulate the energy balance in the cell and prevents excessive ATP production.

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  • 7. 
    What is formed in the mitochondria of the liver when acetoacetate uses NADH (produced from beta-oxidation) and is catalyzed by a certain enzyme? - ProProfs

    What is formed in the mitochondria of the liver when acetoacetate uses NADH (produced from beta-oxidation) and is catalyzed by a certain enzyme?

    • HMG-butyrate

    • Acetone

    • Hydroxybutyrate

    • 3-Hydroxybutyrate

    Correct Answer
    A. 3-Hydroxybutyrate
    Explanation
    When acetoacetate uses NADH (produced from beta-oxidation) and is catalyzed by a certain enzyme in the mitochondria of the liver, 3-Hydroxybutyrate is formed.

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  • 8. 
    Once acetoacetate is formed from HMG-CoA lyase where is it released? - ProProfs

    Once acetoacetate is formed from HMG-CoA lyase where is it released?

    • Into the liver

    • Into the blood

    • Into the mucle

    • Stays put, does not move

    Correct Answer
    A. Into the blood
    Explanation
    After being formed from HMG-CoA lyase, acetoacetate is released into the blood. This is because acetoacetate is a ketone body that is produced in the liver during periods of fasting or prolonged exercise. It is then released into the bloodstream to be used as an energy source by other tissues in the body, such as the brain and muscles. Therefore, the correct answer is "Into the blood."

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  • 9. 
    What is the smallest number of carbon atoms that can be present in a Ketone? - ProProfs

    What is the smallest number of carbon atoms that can be present in a Ketone?

    • 3

    • 2

    • 1

    • 4

    Correct Answer
    A. 3
    Explanation
    A ketone is a type of organic compound that contains a carbonyl group, which consists of a carbon atom double bonded to an oxygen atom. In a ketone, the carbonyl group is always located in the middle of the molecule, with two other carbon atoms attached to it. Therefore, the smallest number of carbon atoms that can be present in a ketone is 3.

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  • 10. 
    What must the extrahepatic tissues contain in order for the Ketone Bodies to be used as fuel? - ProProfs

    What must the extrahepatic tissues contain in order for the Ketone Bodies to be used as fuel?

    • Ketone lyase and mitochondria

    • Thiophorase and cytosol

    • Thiophorase and mitochondria

    • HMG-CoA synthase and mitochondria

    Correct Answer
    A. Thiophorase and mitochondria
    Explanation
    In order for Ketone Bodies to be used as fuel, the extrahepatic tissues must contain thiophorase and mitochondria. Thiophorase is an enzyme that is responsible for converting ketone bodies into acetyl-CoA, which can then enter the citric acid cycle in the mitochondria to produce energy. Mitochondria are the organelles responsible for generating energy in the form of ATP. Therefore, the presence of both thiophorase and mitochondria is necessary for the utilization of ketone bodies as fuel in extrahepatic tissues.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 14, 2018
    Quiz Created by
    Zlatan Aleksic
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