Biochemistry Quiz On Carbohydrates

Reviewed by Stephen Reinbold
Stephen Reinbold, PhD, Biological Sciences |
Biology Expert
Review Board Member
Stephen Reinbold has a Ph.D. in Biological Sciences with a particular interest in teaching. He taught General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology for almost thirty years at Metropolitan Community College in Kansas City, Missouri. He particularly enjoyed emphasizing scientific methodology and student research projects. Now, enjoying retirement, he works part-time as an editor while also engaging in online activities.
, PhD, Biological Sciences
Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
Learn about Our Editorial Process
| By Astosich
A
Astosich
Community Contributor
Quizzes Created: 13 | Total Attempts: 96,547
Questions: 22 | Attempts: 45,886

SettingsSettingsSettings
Biochemistry Quiz On Carbohydrates - Quiz

Carbohydrates are the fuel that provides energy to the human body. This Biochemistry quiz on carbohydrates tests your understanding of carbohydrates and other complex chemical phenomena related to the human body. The quiz contains various questions ranging from easy, medium, to hard levels aimed not only to test your knowledge but also to provide you with valuable learning. If you find the quiz helpful, do share it with your friends. All the best!


Biochemistry Questions and Answers

  • 1. 

    Which of these elements is NOT a constituent of Carbohydrates?

    • A.

      Carbon

    • B.

      Hydrogen

    • C.

      Oxygen

    • D.

      Nitrogen

    Correct Answer
    D. Nitrogen
    Explanation
    Carbohydrates strictly consist of Carbon, and the components of Water ('hydro') - Hydrogen & Oxygen. Hence, Carbo+Hydrate

    Rate this question:

  • 2. 

    Another word that might describe complex carbohydrates is...

    • A.

      Monosaccharide

    • B.

      Disaccharide

    • C.

      Polysaccharide

    • D.

      None of the above

    Correct Answer
    C. Polysaccharide
    Explanation
    Polysaccharide is another word that describes complex carbohydrates. Polysaccharides are long chains of monosaccharide units linked together by glycosidic bonds. They include substances like starch, glycogen, and cellulose. These complex carbohydrates serve various functions, such as energy storage in plants (starch) and animals (glycogen), and providing structural support in plant cell walls (cellulose). Unlike simple carbohydrates like monosaccharides and disaccharides, polysaccharides have more complex structures and provide sustained energy release.

    Rate this question:

  • 3. 

    Carbon is the basis for carbohydrates and all other biologically important molecules. All of the following are reasons why Carbon lends itself to being the basic building block of life on our planet - except for one. Which statement is incorrect?

    • A.

      Carbon readily makes four stable bonds in single, double, or triple configurations.

    • B.

      Carbon is a very dense & heavy element, giving living things stability.

    • C.

      Carbon is the least electronegative non-metal

    • D.

      Carbon has a high affinity for Oxygen & Hydrogen, which make bonds easily with C.

    Correct Answer
    B. Carbon is a very dense & heavy element, giving living things stability.
    Explanation
    Carbon is not so dense and heavy as to be the reason for stable biomolecules. Their stability comes from a variety of factors, including bonds, molecule shape, size & molecular mass.

    Rate this question:

  • 4. 

    As a component of Carbohydrates, Oxygen is very important, too. Which of the following statements is incorrect about the way Oxygen behaves as part of a molecule?

    • A.

      Oxygen has six outer valence electrons, and makes up to 2 bonds.

    • B.

      Oxygen is highly electronegative; it is an 'electron hog', sharing them unevenly.

    • C.

      The uneven sharing of electrons results in Oxygen forming polar covalent bonds.

    • D.

      The presence of oxygen in Carbohydrates makes them highly insoluble in water.

    Correct Answer
    D. The presence of oxygen in Carbohydrates makes them highly insoluble in water.
    Explanation
    Actually, the reverse is true: Oxygen enhances a molecule's solubility in water.

    Rate this question:

  • 5. 

    Which of these functional groups are you not going to find in a carbohydrate?

    • A.

      Carbonyl -C=O

    • B.

      Sulfhydryl -SH

    • C.

      Hydroxyl -OH

    • D.

      Ether -C-O-C-

    Correct Answer
    B. Sulfhydryl -SH
    Explanation
    Sulfur is not a component of the Carbohydrates. It is found in some amino acids & proteins.

    Rate this question:

  • 6. 

    Which of the following carbohydrates does this structural diagram represent?

    • A.

      Glucose

    • B.

      Fructose

    • C.

      Maltose

    • D.

      Sucrose

    Correct Answer
    A. Glucose
    Explanation
    The structural diagram represents glucose, a simple sugar and monosaccharide. Glucose is an important carbohydrate in the body and is used as a source of energy. It is a hexose sugar, meaning it has six carbon atoms. The diagram shows the arrangement of the carbon, hydrogen, and oxygen atoms in glucose, with a ring structure formed by five carbon atoms and an oxygen atom.

    Rate this question:

  • 7. 

    Which of the following carbohydrates does this structural diagram represent?

    • A.

      Glucose

    • B.

      Fructose

    • C.

      Maltose

    • D.

      Sucrose

    Correct Answer
    C. Maltose
    Explanation
    The structural diagram represents maltose because it shows two glucose molecules linked together by a glycosidic bond. Maltose is a disaccharide composed of two glucose units, and the diagram accurately depicts this structure. Glucose is a monosaccharide, fructose is a different monosaccharide, and sucrose is a disaccharide composed of glucose and fructose. Therefore, the correct answer is maltose.

    Rate this question:

  • 8. 

    Which of the following carbohydrates does this structural diagram represent?

    • A.

      Glucose

    • B.

      Fructose

    • C.

      Maltose

    • D.

      Sucrose

    Correct Answer
    B. Fructose
    Explanation
    The structural diagram represents fructose because it matches the chemical structure of fructose, which is a monosaccharide with a five-carbon ring structure. Glucose, maltose, and sucrose have different structural arrangements and do not match the diagram.

    Rate this question:

  • 9. 

    Which of the following carbohydrates does this structural diagram represent?

    • A.

      Glucose

    • B.

      Fructose

    • C.

      Maltose

    • D.

      Sucrose

    Correct Answer
    D. Sucrose
    Explanation
    The structural diagram provided represents sucrose. Sucrose is a disaccharide composed of one glucose molecule and one fructose molecule joined together by a glycosidic bond. The diagram shows the two monosaccharides connected by this bond, indicating that it is sucrose.

    Rate this question:

  • 10. 

    The diagrams below show a complex carbohydrate in some of your body cells. Which complex carbohydrate is it?

    • A.

      Cellulose

    • B.

      Chitin

    • C.

      Glucagon

    • D.

      Glycogen

    Correct Answer
    D. Glycogen
    Explanation
    Glycogen is the main storage polysaccharide in mammalian bodies. Your liver & some large skeletal muscles store it.

    Rate this question:

  • 11. 

    The sugars glucose, fructose, and galactose all belong to which category of carbohydrates?

    • A.

      Monosaccharides

    • B.

      Disaccharides

    • C.

      Polysaccharides

    Correct Answer
    A. Monosaccharides
    Explanation
    Glucose, fructose, and galactose all belong to the category of monosaccharides. Monosaccharides are the simplest form of carbohydrates and cannot be hydrolyzed into smaller carbohydrate units. They are fundamental building blocks for more complex carbohydrates like disaccharides and polysaccharides. Glucose is a primary energy source, fructose is found in many fruits, and galactose is part of lactose, the sugar found in milk. These monosaccharides are crucial in various metabolic pathways and energy production processes in living organisms.

    Rate this question:

  • 12. 

    The sugars lactose, maltose, and sucrose all belong to which category of carbohydrates?

    • A.

      Monosaccharides

    • B.

      Disaccharides

    • C.

      Polysaccharides

    • D.

      None of the above

    Correct Answer
    B. Disaccharides
    Explanation
    Lactose, maltose, and sucrose all belong to the category of disaccharides. Disaccharides are carbohydrates composed of two monosaccharide units linked together by a glycosidic bond. Lactose is made up of glucose and galactose, maltose consists of two glucose molecules, and sucrose is composed of glucose and fructose. These sugars are commonly found in dairy products, malted grains, and table sugar, respectively. Disaccharides are important dietary sugars that provide energy and are broken down into their monosaccharide components during digestion.

    Rate this question:

  • 13. 

    The diagram below shows the most common reaction that helps more complex carbohydrates form. What is the name of the reaction?

    • A.

      Hydrolysis

    • B.

      Dehydration synthesis

    • C.

      Dehydoxylation

    • D.

      Hydration

    Correct Answer
    B. Dehydration synthesis
    Explanation
    It's a removal of water (O + OH = H2O) (dehydration) that brings together two molecules into one (synthesis).

    Rate this question:

  • 14. 

    Which of the following is NOT a role of Carbohydrates in a cell or organism?

    • A.

      Provide energy, either immediate or long-term (storage)

    • B.

      Provide structure, support, and strength in certain organisms.

    • C.

      Formation of muscle tissues & bone in vertebrate bodies

    • D.

      Osmoregulation - moderating fluid balance in living organisms

    Correct Answer
    C. Formation of muscle tissues & bone in vertebrate bodies
    Explanation
    Although we tend to think of carbs as a high-energy nutrient, they have other roles: chitin makes up the exoskeletons of insects & crustaceans, cellulose is the supporting fibre of herbaceous plants, and starches & sugars play a role in osmoregulation of cells, too. Protein is responsible for forming muscle & bone.

    Rate this question:

  • 15. 

    Which of the following is not a monosaccharide?

    • A.

      Glucose

    • B.

      Fructose

    • C.

      Galactose

    • D.

      Sucrose

    Correct Answer
    D. Sucrose
    Explanation
    Sucrose is not a monosaccharide because it is a disaccharide composed of two monosaccharides, glucose and fructose, joined together by a glycosidic bond. Monosaccharides, on the other hand, are single sugar molecules that cannot be broken down into smaller sugar units. Glucose, fructose, and galactose are all monosaccharides because they consist of a single sugar unit.

    Rate this question:

  • 16. 

    What is the most common monosaccharide found in the human body?

    • A.

      Fructose

    • B.

      Galactos

    • C.

      Ribose

    • D.

      Glucose

    Correct Answer
    D. Glucose
    Explanation
    Glucose is the most common monosaccharide found in the human body. It is a primary source of energy for cells and is essential for metabolic processes. Glucose is transported through the bloodstream to provide energy to all body tissues. It is also a building block for more complex carbohydrates like starch and glycogen. Monitoring glucose levels is crucial in managing conditions like diabetes, highlighting its importance in biochemistry and health.

    Rate this question:

  • 17. 

    What polysaccharide is used by plants to store energy?

    • A.

      Cellulose

    • B.

      Glycogen

    • C.

      Starch

    • D.

      Chitin

    Correct Answer
    C. Starch
    Explanation
    Starch is the polysaccharide used by plants to store energy. It is made up of glucose units linked together and is stored in plant cells as granules. When energy is needed, plants break down starch into glucose, which can then be used in cellular respiration to produce ATP, the energy currency of cells. Starch is also an important dietary carbohydrate for humans and animals, providing a significant source of energy.

    Rate this question:

  • 18. 

    What enzyme is responsible for breaking down starch into simpler sugars?

    • A.

      Lactase

    • B.

      Amylase

    • C.

      Maltase

    • D.

      Sucrase

    Correct Answer
    B. Amylase
    Explanation
    Amylase is the enzyme responsible for breaking down starch into simpler sugars like maltose and glucose. Amylase is produced in the salivary glands and the pancreas. When we eat starchy foods, amylase in saliva begins the digestion process in the mouth, and pancreatic amylase continues the process in the small intestine. This enzyme plays a crucial role in carbohydrate digestion, ensuring that complex carbohydrates can be converted into a form that the body can use for energy.

    Rate this question:

  • 19. 

    What carbohydrate is the main structural component of plant cell walls?

    • A.

      Starch

    • B.

      Glycogen

    • C.

      Cellulose

    • D.

      Chitin

    Correct Answer
    C. Cellulose
    Explanation
    Cellulose is the main structural component of plant cell walls. It is a polysaccharide composed of glucose units linked by β-1,4-glycosidic bonds. This structure gives cellulose its strength and rigidity, allowing plants to stand upright and grow. Unlike starch, humans cannot digest cellulose due to the lack of enzymes that break down β-1,4-glycosidic bonds. However, it is an important part of dietary fiber, aiding in digestive health.

    Rate this question:

  • 20. 

    What carbohydrate is stored in the liver and muscles for energy?

    • A.

      Starch

    • B.

      Cellulose

    • C.

      Sucrose

    • D.

      Glycogen

    Correct Answer
    D. Glycogen
    Explanation
    Glycogen is the carbohydrate stored in the liver and muscles for energy. It is a polysaccharide composed of glucose units linked together in a highly branched structure. When the body needs energy, glycogen is broken down into glucose, which is then used in cellular respiration to produce ATP. Glycogen storage allows for quick release of glucose during physical activity or between meals, maintaining blood sugar levels and energy supply.

    Rate this question:

  • 21. 

    What is the main sugar found in milk?

    • A.

      Sucrose

    • B.

      Glucose

    • C.

      Fructose

    • D.

      Lactose

    Correct Answer
    D. Lactose
    Explanation
    Lactose is the main sugar found in milk. It is a disaccharide composed of glucose and galactose. Lactose is digested in the small intestine by the enzyme lactase, which breaks it down into its monosaccharide components for absorption. Lactose is an important source of energy for infants and young mammals. Some people have lactose intolerance, which means they lack sufficient lactase to digest lactose properly, leading to digestive discomfort.

    Rate this question:

  • 22. 

    What type of bond links monosaccharides together in polysaccharides?

    • A.

      Peptide bond

    • B.

      Hydrogen bond

    • C.

      Glycosidic bond

    • D.

      Ionic bond

    Correct Answer
    C. Glycosidic bond
    Explanation
    A glycosidic bond links monosaccharides together in polysaccharides. This covalent bond forms between the hydroxyl group of one monosaccharide and the anomeric carbon of another, releasing a molecule of water. Glycosidic bonds can vary in their position and configuration, leading to different structures and properties of polysaccharides, such as starch, glycogen, and cellulose. Understanding glycosidic bonds is fundamental in biochemistry, as it explains how complex carbohydrates are built from simple sugars.

    Rate this question:

Stephen Reinbold |PhD, Biological Sciences |
Biology Expert
Stephen Reinbold has a Ph.D. in Biological Sciences with a particular interest in teaching. He taught General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology for almost thirty years at Metropolitan Community College in Kansas City, Missouri. He particularly enjoyed emphasizing scientific methodology and student research projects. Now, enjoying retirement, he works part-time as an editor while also engaging in online activities.

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jun 02, 2024
    Quiz Edited by
    ProProfs Editorial Team

    Expert Reviewed by
    Stephen Reinbold
  • Feb 04, 2011
    Quiz Created by
    Astosich
Back to Top Back to top
Advertisement
×

Wait!
Here's an interesting quiz for you.

We have other quizzes matching your interest.