Question

what structure helps maintain cell shape and is composed of proteins? 2 points the rough er the cytoskeleton the smooth er what is the main function of the cell wall in plant cells? 2 points to look pretty protection and support movement

Explanation:

• The cytoskeleton is a network of protein filaments (such as microtubules, microfilaments, and intermediate filaments) that helps maintain cell shape, provides mechanical support, and is involved in cell movement, intracellular transport, and cell division.
• The cell wall in plant cells is a rigid structure made of cellulose (in most plants). Its main functions are to provide protection (against physical damage, pathogens etc.) and support (maintaining the shape of the plant cell and helping the plant to stand upright). The rough ER (endoplasmic reticulum) is involved in protein synthesis and modification. The smooth ER is involved in lipid synthesis, detoxification etc. And “to look pretty” is not a biological function for the cell wall. Movement is not a function of the cell wall.

Answer:

• The cytoskeleton
• Protection and support