Question

speeds up chemical reactions. makes up plant cell walls. insulates against heat loss. protein lipid nucleic acid carbohydrate previous

Explanation:

• Speeds up chemical reactions: Proteins can act as enzymes which are biological catalysts that speed up chemical reactions.
• Makes up plant cell walls: Carbohydrates (specifically cellulose) make up plant cell walls.
• Insulates against heat loss: Lipids (such as fats) can insulate against heat loss.

Answer:

Speeds up chemical reactions - Protein, Makes up plant cell walls - Carbohydrate, Insulates against heat loss - Lipid.