The cell wall and the chloroplast are only present in the plant cell.The cell wall is the outermost rigid layer that surrounds the cell membrane. Chloroplast is present within the cytoplasm of the plant cell that helps in photosynthesis.
Further Explanation:
The cell wall is the rigid outer layer of some cells like plant and bacterial cells. It is the outermost layer of the cell that covers the plasma membrane. It is composed of cellulose (complex carbohydrate) which providesa rigid structure. It consists of three layers namely; Middle lamella, Primary cell wall, and Secondary cell wall. Middle lamella forms the foremost layer of the cell wall. It consists of pectin that supports cell adhesion. Primary cell wall contains cellulose microfibrils that provide strength and flexibility. Secondary cell wall contains cellulose and lignin that strengthen the cell wall.
Chloroplast helps in photosynthesis by converting light energy into chemical energy. It has a round, oval, disk-shaped structure. It is a double membranous structure and the outer and inner layers are separated by the intermembrane space. The innermost (third) membrane vesicles (thylakoid) are arranged in the form of stacks that reside in a matrix known as the stroma. The green pigment is present in the thylakoid. The two types of pigments; namely chlorophyll a and chlorophyll b are present in the chloroplast. These pigments are responsible for the absorption of light energy.
Learn More:
1. Learn more about the treatment of eukaryotic cell with a drug
2. Learn more about the proteins synthesis in a cell
3. Learn more about an exchange of gases by blood cells
Answer Details:
Grade: High school
Subject: Biology
Chapter: Structure of the cell.
Keywords:
Cell wall, chloroplast, rigid, semi-permeable, lamella, microfibrils, lignin, organelle, photosynthesis, chemical, thylakoid, stroma, chlorophyll, pigment.
