Q2. Which polysaccharide is present in the exoskeleton of arthropods?A. StarchB. CelluloseC. ChitinD. Glycogen
Q3. Which of the following statements about proteins is correct?A. Proteins are composed of long chains of fatty acids.B. Proteins can function as enzymes.C. Proteins do not have any structural role in cells.D. Proteins are composed only of carbon and hydrogen.
Q4. What is the primary function of phospholipids in cells?A. Energy storageB. Structural component of membranesC. Catalysis of reactionsD. Genetic information storage
Q5. Which organic molecule forms the primary structural component of plant cell walls?A. StarchB. GlycogenC. CelluloseD. Chitin
Q6. What type of chemical bond joins monosaccharides in polysaccharides?A. Peptide bondB. Glycosidic bondC. Phosphodiester bondD. Hydrogen bond
Q7. Which of the following is a secondary structure of proteins?A. Alpha-helixB. Beta-pleated sheetC. Both A and BD. Quaternary structure
Q8. Which of the following statements about proteins is incorrect?A. Proteins are composed of amino acids.B. Proteins can function as enzymes.C. Proteins are used for genetic information storage.D. Proteins provide structural support in cells.
Q9. Which of the following statements about DNA is correct?A. It contains uracil instead of thymineB. It is single-strandedC. It contains deoxyribose sugarD. It is made up of amino acids
Q10. Which of the following statements about DNA is correct?A. DNA contains the nitrogenous base uracil.B. DNA has a double-helix structure.C. DNA is made up of amino acids.D. DNA is a polymer of fatty acids.