Question

16. Which is not a characteristic of plant cell walls?
a) Found only in the sporophyte phase of life cycle
b) Among other compounds contains compounds built of simple sugars
c) May contain enzymes that are biologically active
d) Often contain strengthening polymers​

Answer 1

a) Found only in the sporophyte phase of life cycle

Explanation:

• In the plant cell wall, the major carbohydrates found are cellulose, hemicellulose and pectin. The cellulose microfibrils are linked through hemicellulosic ethers to form the cellulose-hemicellulose network that is embedded in the pectin matrix.
• Cell walls contain a variety of enzymes in that most important are those that cross-linked extensin, lignin, cutin, and suberin molecules into networks.
• Cellulose is the main cell wall polymer which works support system to the plant. It is a linear insoluble unbranched polymer of β-(1,4)-D-Glucose residues link with other cellulose chains by hydrogen bonding and alsoVan der Waals forces.

Answer 2

Answer:a

Explanation: