Question: What is not present in the plant cell?
Options:
Cell membrane
Vacuole
Chloroplast
Centrioles
Centriole:
→ A centriole is a microtubule-based structure that is part of the centrosome.
→ It helps arrange microtubules inside the cell.
→ A centriole is a primary unit responsible for creating and anchoring microtubules.
→ One centriole in a eukaryotic cell is perpendicular to a second centriole in the centrosome.
→ Microtubules extend from each centriole, using each centriole as an anchor for the microtubule's base.
→ Centrioles are present in animal cells but absent in plant cells.
📝 Additional Information
→ Cell Membrane:
Within the cell wall lies a somewhat permeable membrane.
A thin layer of protein and fat composes it.
The cell membrane regulates the entrance and exit of certain chemicals.
→ Chloroplast:
It is an organelle surrounded by a phospholipid membrane and is long.
The chloroplast is disc-shaped.
The stroma is the DNA-containing fluid inside the chloroplast.
Each chloroplast contains the green pigment chlorophyll.
→ Vacuole:
A plant cell has a big vacuole.
Tonoplast is the membrane encompassing the central vacuole.
The central vacuole plays a crucial role in maintaining turgor pressure on the cell wall.
The central vacuole contains cellular sap, including salts, enzymes, and other components.
→ Golgi Apparatus:
The Golgi apparatus is also known as the Golgi complex and the Golgi body.
It is present in all eukaryotic cells, including plants and animals.
They are membrane-bound organelles found in the cell's cytoplasm.