Rough Endoplasmic Reticulum
the ribosome
Mitochondria, the energy from carbohydrates is released and use to make ATP molecules
Carbohydrates provide structure in biological systems by forming complex molecules like cellulose and chitin, which make up the cell walls of plants and fungi. Additionally, carbohydrates are essential components of glycoproteins and glycolipids, which play important roles in cell recognition and communication.
No, carbohydrates are NOT a major components of cell membranes, which are mainly comprised of lipid (fat molecules). Proteins sit in and on the membrane and SOME of the proteins are glycosylated, which means that they have sugar or carbohydrate attached to them. So there are carbohydrates in cell membranes, but they are not a major component.
Glycoproteins and glycolipids are the molecules that make the cell surface fuzzy, sticky, and sugar-rich. They have carbohydrate chains attached to proteins and lipids, respectively, creating a glycocalyx that helps with cell-cell recognition and adhesion.
Carbohydrates often attach to the external surface of integral proteins. These carbohydrates may hold adjoining cells together or act as sites where viruses or chemical messengers such as hormones can attach.
Plants generally make carbohydrates by photosynthesis
Chloroplasts enable plants to make carbohydrates from carbon dioxide and water through the process of photosynthesis. This organelle contains chlorophyll, which captures sunlight to drive the chemical reactions that convert carbon dioxide and water into glucose.
Of the major biomolecules, lipids, carbohydrates, proteins and nucleic acids, only nucleic acids are not present in cell membranes. Lipids make up the bilayer; proteins craete pumps and channels; carbohydrates are part of glycoproteins but no RNA or DNA is present.
The rough endoplasmic reticulum (rough ER) primarily synthesizes proteins that are either secreted from the cell, incorporated into the cell's plasma membrane, or sent to an organelle. In addition to proteins, the rough ER is involved in the initial stages of glycosylation, where carbohydrates are added to proteins, forming glycoproteins. It also plays a role in the synthesis of certain lipids and phospholipids, which are essential for membrane formation and function. Overall, the rough ER is crucial for producing and processing biomolecules important for cellular structure and function.
Carbon, hydrogen, and oxygen make up carbohydrates.
The cell capsule is a very large structure of some bacterial cells. It is a layer that lies outside the cell envelope of bacteria.