Biomolecules I

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30 Questions

Which type of bond is formed between two monosaccharides to create a disaccharide?

Covalent bond

What is the main function of polysaccharides in living organisms?

Energy storage

Which type of cells store glycogen as an energy reserve?

Liver cells

Where is starch primarily stored as an energy reserve in plants?

Chloroplasts & other plastids

What determines the structure and function of a polysaccharide?

Its sugar monomers and positions of glycosidic linkages

What is the main cellular function of monosaccharides?

Main fuels for cellular work

Which structural compound is a major component of the tough wall of plant cells?

Cellulose

What type of glycosidic linkages do cellulose molecules have?

Beta (β)

Which polysaccharide is used by insects and crustaceans to build an exoskeleton?

Chitin

What type of glucose monomer does chitin have with a nitrogen-containing appendage?

With β linkages

In starch, which component is somewhat branched?

Amylopectin

What type of glucose polymers are helical in structure?

α glucose polymers

Which type of carbohydrate is water-insoluble?

Polysaccharides

What is the major function of lipids according to the text?

Energy storage

Which type of lipid is an important component of the plasma membrane?

Phospholipids

What functional group is present in a fatty acid?

Carboxyl group (COOH)

Which type of lipid acts as energy-reserving molecules?

Triglyceride (fats)

What are the monomers of disaccharides and polysaccharides?

Glucose, fructose, galactose

What is the main difference between structural isomers and stereoisomers?

Structural isomers have the same chemical formula, but different skeleton arrangements, while stereoisomers have the same molecular formula and sequence of bonded atoms.

Which statement best describes enantiomers?

Enantiomers are mirror images that are not superimposable on each other.

What distinguishes an enantiomer from a diastereomer?

An enantiomer has the same physical properties as its mirror image, while a diastereomer does not.

Which functional group is present in both glucose and fructose?

Aldehyde

How do monosaccharides differ from polysaccharides?

Monosaccharides are simple sugars consisting of single carbohydrate units, while polysaccharides are complex carbohydrates made up of multiple sugar units.

Which type of molecule consists of identical or similar building blocks (monomers) linked together?

Polysaccharides

In terms of stereochemistry, what does it mean for a molecule to be chiral?

The molecule is non-superimposable on its mirror image.

What is the term for the process of breaking down a polymer into its monomer units?

Hydrolysis

Which macromolecule is a polymer made up of amino acid monomers?

Proteins

In stereochemistry, what term describes molecules that have the same molecular formula but different arrangements of atoms in space?

Isomers

Which type of molecule consists of thousands of atoms connected covalently?

Polysaccharides

Which functional group is commonly found in carbohydrates and helps in forming glycosidic bonds between monosaccharides?

Hydroxyl group

Test your knowledge on the structural isomers glucose and fructose with this quiz. Learn about how these molecules have the same chemical formula but different arrangements of atoms.

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