Cell Structure and Function

Which amino acid is not optically active?

• Alanine
• Valine
• Glycine
• Serine

What is the correct classification of naturally occurring glucose based on its optical activity?

• Levorotatory
• Racemic mixture
• Non-optically active
• Dextrorotatory

Which carbohydrate is the main component of plant cell walls?

• Starch
• Glycogen
• Chitin
• Cellulose

What type of linkage connects monosaccharides in disaccharides?

• Peptide bond
• Hydrogen bond
• Ester bond
• Glycosidic linkage

Which of the following is a ketohexose?

• Glucose
• Ribose
• Sucrose
• Fructose