Middle lamella is composed mainly of:
Muramic acid
Calcium pectate
Phosphoglycerides
Hemicellulose
The correct option is Option 2) Calcium pectate.
The middle lamella is a layer of pectin-rich material that lies between adjacent plant cells and cements them together. It plays a crucial role in maintaining the structural integrity of plant tissues. The middle lamella is mainly composed of a substance called calcium pectate.