| | | D) | All living organisms are composed of one or more cells. | | | | | | Feedback: Cell theory states: all living things are made of cells; cells basic units of structure and organization; cells arise only from previously existing cells. Most prokaryotic cells do not have specialized internal structures. | | 2 CORRECT | | A ____ contains polar and nonpolar ends, forming the plasma membrane. | | | A) | microtubule | | | B) | transport protein | |
Outline the functions of the main cell components. Cells: Cell membrane: The cell membrane is a biological membrane which separates the interior of all cells from the outside environment. It controls the movement of substances in and out of the cells and protects the cells from outside forces. The cell membrane consists of the lipid bi-layer with embedded proteins. The cell membrane surrounds the cytoplasm.
Functions of Plant and Animal Cells Plant and animal cells have important functions. The most important function in both cells is the nucleus. It controls the entire cell and keeps everything running and together. Inside the cell is the cell membrane, mitochondria, vacuole, and the cytoplasm. The cell membrane is like a plastic bag.
The cytoplasm is also where nutrients are absorbed and processed and is where many chemical reactions take place. Cytoplasm This is a semi-fluid material likened to a gel. It holds together the organelles, apart from the nucleus of the cell and supports the cells structure to make it possible for molecules to be transported. The cytoplasm is also where nutrients are absorbed and processed and is where many chemical reactions take place. Mitochondrion Mitochondria are concerned with energy release.
The nucleus regulates all cell activity and is bounded by a double membrane called the nuclear envelope, this membrane separates the contents of the nucleus from the cytoplasm. The Nucleus have two major functions. It stores the cell’s hereditary material, or DNA and it co-ordinates the cell’s activites, which include metabolism, growth, protein synthesis, and reproduction (cell division). ‘Mitochondria are the cell’s power producers’ Bailey, About.com. They convert energy into forms that are usable by the cell.
What is the difference between prokaryotic cells and eukaryotic cells? What are the names for the two major groups of prokaryotes? both have a cell membrance on the outside and both have ribosomes but the eucaryotic only have membrane bound organelles. both can have the cell wal. euc.
Inside each cell, atoms make up molecules. Molecules in turn make up cell organelles and other cellular inclusions. Similar cells form tissues that then collaborate to create organs. Each organ has a distinct function that keeps living organisms alive. Another living property that living organisms possess is regulation.
I will also include comparisons of the organelles to a factory to help better understand the works of a cell. Cell theory There are three main points to cell theory. One is that the cell is the basic unit of life. Another is that all living things are composed of at least one cell: either being unicellular (one cell) or multi-cellular (two or more cells). The last point is that all cells come from pre-existing cells.
| Vesicle | Storage in and out of the cell. | Cytoskeleton | The cytoskeleton plays a critical role in the determination of cell shape and serves as a scaffold for critical cellular enzymes and adhesion molecules. It provides structural integrity for the cell and regulates the function of many biochemical events that are critical to cellular function.
The third domain, Domain Eukarya, contains the four kingdoms, Protista, Plantae, Fungi, and Animalia, all of which are eukaryotes. All kingdoms in domain eukaryote are multicellular, contain a nucleus, where their DNA (deoxyribonucleic acid) is stored, and they have a complex cell structure, complete with organelles. Protists are mostly single celled organisms that include algae,