Table of Contents
- 1 What affects cell division?
- 2 What stimulates cell division in plants?
- 3 What inhibits cell division in plants?
- 4 How do cyclins and kinases regulate cell division?
- 5 What causes the cell to begin division?
- 6 What is the purpose of photosynthesis?
- 7 How does cell division affect plant growth?
- 8 How is cell cycle regulated in plants?
What affects cell division?
Availability of raw materials can affect cell division. If not enough nutrients are available, the cell can’t grow enough and will not divide. Radiation can change DNA molecules. If the DNA has incorrect sequences, the cell will either wait and repair the DNA, stop dividing or enter cell apoptosis or cell death.
What stimulates cell division in plants?
Auxin promotes cell division and meristem maintenance and also plays an important role in the establishment of cellular patterning. Within plant meristems and cambial zones, new cells are formed by division. Between two successive rounds of division, the increase in size of these cells corresponds to cell growth.
Where is photosynthesis in the cell cycle?
chloroplasts
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
What inhibits cell division in plants?
A mitotic inhibitor is a drug that inhibits mitosis, or cell division. Mitotic inhibitors are derived from natural substances such as plant alkaloids, and prevent cells from undergoing mitosis by disrupting microtubule polymerization, thus preventing cancerous growth.
How do cyclins and kinases regulate cell division?
Cyclins drive the events of the cell cycle by partnering with a family of enzymes called the cyclin-dependent kinases (Cdks). A lone Cdk is inactive, but the binding of a cyclin activates it, making it a functional enzyme and allowing it to modify target proteins.
What is one factor that controls cell division?
The cell cycle is controlled by many cell cycle control factors, namely cyclins, cyclin-dependent kinases (Cdks) and cyclin-dependent kinase inhibitors (CKIs). Cyclins and Cdks, which are positive regulators of the cell cycle, activate cell cycle factors that are essential for the start of the next cell cycle phase.
What causes the cell to begin division?
Cells regulate their division by communicating with each other using chemical signals from special proteins called cyclins. These signals act like switches to tell cells when to start dividing and later when to stop dividing.
What is the purpose of photosynthesis?
Plants are autotrophs, which means they produce their own food. They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel.
Which is the end result of photosynthesis?
The Photosynthesis equation Here, six molecules of carbon dioxide (CO2) combine with 12 molecules of water (H2O) using light energy. The end result is the formation of a single carbohydrate molecule (C6H12O6, or glucose) along with six molecules each of oxygen and water.
How does cell division affect plant growth?
Like other multicellular organisms, plants grow through a combination of cell growth and cell division. Cell growth increases cell size, while cell division (mitosis) increases the number of cells. As plant cells grow, they also become specialized into different cell types through cellular differentiation.
How is cell cycle regulated in plants?
Cell cycle regulation is of pivotal importance for plant growth and development. Some regulatory proteins, such as cyclins and inhibitors of cyclin-dependent kinases, are particularly numerous in plants, possibly reflecting the remarkable ability of plants to modulate their postembryonic development.