Question

question 38 forming the cell walls of stems, leaves, and roots, what compound is the primary structural constituent of plant tissues? protein enzymes chlorophyll cellulose starch

Explanation:

Cellulose is the main structural component of plant cell - walls in stems, leaves, and roots. Proteins have various functions like enzymatic and regulatory but not the main structural in cell - walls. Enzymes are mainly for catalyzing reactions. Chlorophyll is for photosynthesis. Starch is a storage form of glucose in plants.

Answer:

cellulose