Which of the following is a primary metabolite?

• Morphine

• Chlorophyll

• Ethanol

• Quinine

Which statement best describes secondary metabolites?

• They are essential for cell survival

• They directly participate in growth and development

• They are by-products of metabolism with ecological roles

• They are carbohydrates

Which of the following is NOT a characteristic of primary metabolites?

• Found in all cells

• Produced during the stationary phase

• Involved in normal physiological functions

• Includes amino acids and nucleotides

Alkaloids, tannins, and flavonoids are examples of:

• Enzymes

• Primary metabolites

• Hormones

• Secondary metabolites

Which of the following is a function of secondary metabolites?

• Energy production

• Cell wall formation

• Defense against herbivores and pathogens

• DNA replication

Which of the following metabolites is responsible for the aroma in flowers?

• Glucose

• Terpenoids

• Proteins

• Vitamins

Which of the following is a class of secondary metabolites?

• Polysaccharides

• Alkaloids

• Lipids

• Proteins