The nuclear membrane has a similar structure to the cell membrane but it contains gaps which allow protein to pass through. The nucleus controls almost all of the activities of the cell. Cytoplasm: The cytoplasm refers to anything which is inside the cell boundary and outside the nucleus. It is a semi-fluid material which is capable of flowing slowly. Many chemical reactions are carried out in the cytoplasm.
| | | A) | endoplastic reticulum | | | B) | microtubules | | | C) | cytoplasm | | | D) | mitochondria | | | | | | Feedback: The cell's chemical processes take place in a semifluid material called the cytoplasm. This material provides an ideal environment for organelles because of its fluidity. | | 7 CORRECT | | This shows an example of endoplasmic reticulum. What is the significance of its structure? | | | A) | provides a location for DNA production | | | B) | helps decrease surface area | | | C) | allows selective permeability of cell membrane | | | D) | facilitates breakdown of chemical bonds | | | | | | Feedback: The pleats and folds of the endoplasmic reticulum provides a large surface area where cellular functions, such as breaking chemical bonds, can take place.
stores proteins and alot of exporting (sending stuff out of the cell) 3. In which part of the cell would you expect to find nucleotides? building block for DNA, DNA found in the nucleus 4. Name the two organelles involved in energy conversion.chloroplast and mitochondria 5. What are the basic functions of the organelles in chapter 4?
When the chromatin is dispersed and not readily stainable, it is known as euchromatin. Euchromatin is prevalent in cells that are active in the transcription of many of their genes while heterochromatin is most abundant in cells that are less active or not active. The nucleus often contains one or more nucleoli that are spherical or oval bodies composed chiefly of ribonucleoproteins. Nucleoli are usually stained with basic dyes because of their high RNA content and are generally larger in cells that are actively participating in protein synthesis. The endoplasmic reticulum (ER) is a system of interconnected membranous sacs, channels, or cisternae in the cytoplasm.
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.
The cell membrane is like a plastic bag. It holds all the cell fluids and pieces. The mitochondria are shaped liked rods and are the cells power sources. The vacuole holds food and nutrients for the cells and rids the cells of metabolic waste. The cytoplasm is the jelly substance that fills the inside of the cell.
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.
Bacteria reproduces by most commonly occurs by a kind of cell division called binary fission. Binary fission results in the formation of two bacterial cells that are genetically identical. 6. The Archaea these microbes are prokaryotes, meaning that they have no cell nucleus or any other membrane-bound organelles within their cells. 7.
| | Cells | Cells are the smallest functional unit organism. Cells have many different functions inside of living things. | | Eukaryotic | An Eukaryotic cell is a cell that has a nucleus and all of the organelles in the inside are protected by a cell membrane. | | Prokaryotic | Prokaryotic cells don't have a nucleus. | | Cell Membrane | The Cell Membrane holds everything inside the cell together and protects it from things that could harm it.
| Nucleolus | The nucleolus is responsible for the cell organelles (e.g. lysosomes, ribosomes, etc.). | Cell membrane | The cell membrane keeps the cell together by containing the organelles within it. Cell membranes are selectively-permeable, allowing materials to move both into and outside of the cell. | Vesicle | Storage in and out of the cell.