Where does the protein synthesis process begin? In the nucleus b. What is chromatin? Complex proteins and some RNA c. Define a gene and explain its importance. The hereditary units that controls cellular structure and directs cellular activity.
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.
| | | 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. |
The plasma membrane acts as a selective barrier between the cell and its environment, and is a structure that you will study in detail throughout the year. The nucleus consists of a limiting double bilayer nuclear envelope containing nuclear pores enclosing the nucleoplasm. Small, irregular particles scattered throughout the nucleus or accumulated adjacent to the nuclear envelope are clumps of condensed chromatin known as heterochromatin. They consist of protein and DNA and stain with basic dyes. When the chromatin is dispersed and not readily stainable, it is known as euchromatin.
Outline the Function of the Main Cell Components Lysosome Contains powerful enzymes capable of digesting all major chemical components of living cells. Lysosome Contains powerful enzymes capable of digesting all major chemical components of living cells. 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.
The breakdown of the membranes of these structures, affect the function of his heart cells because lysosomal enzymes which are normally bound safely inside vesicles will digest the plasma membranes and the membranes of the organelles. D.) Predisposition means that Joseph inherited vascular disease. Dna is in the nucleus of the cell. We need DNA to replicate or repair our cells. Also, cytosol is the site of chemical reactions needed to maintain cell structures and allow cell growth.
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.
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?
| The word Ribosomes remind me of Ribs. Then I think of protein which leads me to the definition. | Endoplasmic Reticulum | The Endoplasmic Reticulum is a bunch of membranes inside of a cells. It's function is mainly manufacturing and packing. | | Golgi Apparatus | Golgi Apparatus creates lysosomes which helps with digestion.
The protein molecule is able to float in the membrane – part of it is embedded in the membrane, part of it sticks into the cytoplasm, and part of it sticks out into the aqueous environment of the cell. What do you suspect about its structure, including its amino acid sequence, to make it behave as it does? * Examine the diagram of the cell membrane below. Is the diagram a “good” illustration of the fluid mosaic model of the cell membrane? What aspects of cell membrane structure are accurately illustrated by it?