Most plants regulate the size of stomata with guard cells. Each stoma is surrounded by a pair of sausage-shaped guard cells. In bright light the guard cells take in water by osmosis and become plump and turgid . In low light the guard cells lose water and become flaccid , causing the stomata to close.
Q. How is photosynthesis related to macromolecules?
Virtually all organic material on Earth has been produced by cells that convert energy from the Sun into energy-containing macromolecules. This process, called photosynthesis, is essential to the global carbon cycle and organisms that conduct photosynthesis represent the lowest level in most food chains (Figure 1).
Table of Contents
Q. Does photosynthesis produce lipids?
Learn about the role of photosynthesis in glucose and oxygen production in plants. Not only carbohydrates, as was once thought, but also amino acids, proteins, lipids (or fats), pigments, and other organic components of green tissues are synthesized during photosynthesis. …
Q. Why do plants produce organic molecules during photosynthesis?
Photosynthesis in plants makes useful organic compounds out of carbon dioxide through carbon‑fixation reactions. Carbon dioxide serves as the source of carbon, and it enters the photosynthetic process in a series of reactions called the carbon-fixation reactions (also known as the dark reactions).
Q. What organic molecules do plants produce?
Using energy from sunlight, plants can make inorganic molecules (CO2 and H2O) into glucose (C6H12O6, an organic molecule with chemical energy in its C-C and C-H bonds) and oxygen (O2).
Q. How is stomatal opening controlled?
The opening and closing of stomata is regulated by the integration of environmental signals and endogenous hormonal stimuli. The various different factors to which the guard cells respond translates into the complexity of the network of signaling pathways that control stomatal movements.
