Question

1. water is a covalently bonded molecule. *

mark only one oval.
true
false

1. which of the following is not a biological molecule? *

mark only one oval.
carbohydrate
protein
lipid
nucleic acid
water

Explanation:

• For question 12: Water (\(H_2O\)) has covalent bonds between hydrogen and oxygen atoms.
• For question 13: Carbohydrates, proteins, lipids, and nucleic acids are biological macromolecules. Water is a simple molecule but not a biological macromolecule in the context of the question.

Answer:

1. true
2. water