Carbohydrates

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Questions and Answers

What determines the classification of monosaccharides?

  • The type of glycosidic linkage and the number of hydrogen atoms
  • The number of double bonds and the spatial arrangement around the asymmetric C
  • The type of sugar monomers and the location of the carbonyl group
  • The location of the carbonyl group, the number of carbons in the carbon skeleton, and the spatial arrangement around the asymmetric C (correct)

Which type of sugar has the carbonyl group attached at the end of the carbon skeleton?

  • Ketose
  • Aldose (correct)
  • Glucose
  • Fructose

What is the composition of the disaccharide sucrose?

  • Glucose and glucose
  • Galactose and fructose
  • Glucose and fructose (correct)
  • Glucose and galactose

What type of bond joins two monosaccharides to form a disaccharide?

<p>Glycosidic linkage (C)</p> Signup and view all the answers

Which polysaccharide is a storage polysaccharide in plants?

<p>Starch (C)</p> Signup and view all the answers

Where do humans and other vertebrates mainly store glycogen?

<p>Liver and muscle cells (D)</p> Signup and view all the answers

What is the difference between starch and cellulose based on their glucose molecules?

<p>The glycosidic linkages differ (D)</p> Signup and view all the answers

Which type of glucose molecules form a helical polymer like starch?

<p>Alpha-glucose (C)</p> Signup and view all the answers

What is the function of cellulose in human food?

<p>Passes through the digestive tract as insoluble fiber (D)</p> Signup and view all the answers

What is the structural polysaccharide found in the exoskeleton of arthropods?

<p>Chitin (B)</p> Signup and view all the answers

What is the main function of glycogen in animals?

<p>Long-term energy storage (A)</p> Signup and view all the answers

What determines the structure and function of a polysaccharide?

<p>Sugar monomers and the glycosidic bonds (D)</p> Signup and view all the answers

Which of the following is a definition of a polymer?

<p>A large molecule consisting of many identical building blocks (D)</p> Signup and view all the answers

Which of the following macromolecules can form polymers?

<p>Carbohydrates (B)</p> Signup and view all the answers

What type of reaction occurs when two monomers bond together through the loss of a water molecule?

<p>Condensation (Dehydration) Reaction (A)</p> Signup and view all the answers

What is the process called when polymers are broken down into monomers using a water molecule?

<p>Hydrolysis (A)</p> Signup and view all the answers

Which of the following serves as fuel and building material?

<p>Carbohydrates (A)</p> Signup and view all the answers

How many major classes of biologically essential organic molecules are found in all living organisms?

<p>Four (C)</p> Signup and view all the answers

What is the term for the reaction in which a water molecule is used during the breakdown of polymers?

<p>Hydrolysis (A)</p> Signup and view all the answers

Which macromolecule is NOT capable of forming polymers?

<p>Lipids (B)</p> Signup and view all the answers

What occurs during a condensation (dehydration) reaction?

<p>Two monomers bond together with the loss of a water molecule (A)</p> Signup and view all the answers

Which class of macromolecules primarily serves as a source of long-term energy storage?

<p>Lipids (C)</p> Signup and view all the answers

What is the term for the process of breaking down polymers into monomers?

<p>Hydrolysis (C)</p> Signup and view all the answers

Which macromolecule is the main component of cellular structures and is involved in cell signaling?

<p>Proteins (D)</p> Signup and view all the answers

Macromolecules are polymers built from monomers

<p>True (A)</p> Signup and view all the answers

All four classes of macromolecules can form polymers

<p>False (B)</p> Signup and view all the answers

A condensation (dehydration) reaction occurs when two monomers bond together through the loss of a water molecule

<p>True (A)</p> Signup and view all the answers

Hydrolysis is a process in which a water molecule is used during the breakdown of polymers

<p>True (A)</p> Signup and view all the answers

Carbohydrates are one of the four major classes of biologically essential organic molecules found in all living organisms

<p>True (A)</p> Signup and view all the answers

Polysaccharides primarily serve as a source of short-term energy storage

<p>False (B)</p> Signup and view all the answers

Lipids can form polymers

<p>False (B)</p> Signup and view all the answers

Glycogen is a structural polysaccharide found in the exoskeleton of arthropods

<p>False (B)</p> Signup and view all the answers

Starch and cellulose differ in the arrangement of their glucose molecules

<p>True (A)</p> Signup and view all the answers

The main function of cellulose in human food is to serve as a source of energy

<p>False (B)</p> Signup and view all the answers

Sucrose is a disaccharide composed of glucose and fructose

<p>True (A)</p> Signup and view all the answers

Nucleic acids are capable of forming polymers

<p>True (A)</p> Signup and view all the answers

Monosaccharides are classified by the number of carbons in the carbon skeleton.

<p>True (A)</p> Signup and view all the answers

The carbonyl group of an aldose sugar is attached within the carbon skeleton.

<p>False (B)</p> Signup and view all the answers

Fructose is an example of an aldose sugar.

<p>False (B)</p> Signup and view all the answers

Disaccharides are formed through a hydration reaction.

<p>False (B)</p> Signup and view all the answers

Starch consists entirely of fructose monomers.

<p>False (B)</p> Signup and view all the answers

Glycogen is a storage polysaccharide in animals.

<p>True (A)</p> Signup and view all the answers

Cellulose and starch are both polymers of glucose.

<p>True (A)</p> Signup and view all the answers

Polymers such as cellulose with beta glucose are helical.

<p>False (B)</p> Signup and view all the answers

Enzymes that digest starch by hydrolyzing alpha linkages can also hydrolyze beta linkages in cellulose.

<p>False (B)</p> Signup and view all the answers

Chitin is found in the exoskeleton of arthropods and provides structural support for the cell walls of many fungi.

<p>True (A)</p> Signup and view all the answers

Chitin is used to make a strong and flexible surgical thread.

<p>True (A)</p> Signup and view all the answers

Cellulose in human food is easily digested in the digestive tract.

<p>False (B)</p> Signup and view all the answers

Match the following macromolecules with their primary function:

<p>Carbohydrates = Serve as fuel and building material Lipids = Source of long-term energy storage Proteins = Main component of cellular structures and involved in cell signaling Nucleic acids = Store and transmit genetic information</p> Signup and view all the answers

Match the following terms with their corresponding definitions:

<p>Polymer = Large molecule consisting of many identical building blocks Monomer = Identical building block of a polymer Condensation (Dehydration) Reaction = Occurs when two monomers bond together through the loss of a water molecule Hydrolysis = Process in which a water molecule is used during the breakdown of polymers</p> Signup and view all the answers

Match the following macromolecules with their ability to form polymers:

<p>Carbohydrates = Can form polymers Lipids = Cannot form polymers Proteins = Can form polymers Nucleic acids = Capable of forming polymers</p> Signup and view all the answers

Match the following monosaccharide classification with their corresponding descriptions:

<p>Aldose sugar = The carbonyl group is attached at the end of the carbon skeleton Ketose sugar = The carbonyl group is attached within the carbon skeleton Glucose = Aldose sugar Fructose = Ketose sugar</p> Signup and view all the answers

Match the following disaccharides with their constituent monosaccharides:

<p>Sucrose = Glucose + Fructose Lactose = Galactose + Glucose Maltose = Glucose + Glucose Fructose = Galactose + Glucose</p> Signup and view all the answers

Match the following polysaccharides with their primary function:

<p>Starch = Storage polysaccharide in plants Glycogen = Storage polysaccharide in animals Cellulose = Major component of the tough wall of plant cells Chitin = Found in the exoskeleton of arthropods and provides structural support for cell walls of fungi</p> Signup and view all the answers

Match the following glucose forms with their corresponding structures:

<p>Alpha-glucose = Forms helical polymers like starch Beta-glucose = Forms straight polymers like cellulose Starch = Formed from alpha-glucose molecules Cellulose = Formed from beta-glucose molecules</p> Signup and view all the answers

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