The generalised cell

cihaziki's version from 2015-11-11 13:51


error: Tag should look something like: [diagram:, A=3x4, B=6x10]


Asupervises cell activity; consists of protein-coated hereditary material (DNA) in dispersed (chromatin) or condensed (chromosomes) forms, the nucleolus, and a porous nuclear membrane. The DNA holds all instructions for cell activity. The nucleolus produces RNA, some of which conveys the instructions of DNA through the nuclear pores to the cytoplasm. be your reason
BThe construction of the cell membrane is the same as that of the membranes of several intracellular structures. The cytoplasm is the ground substance of the cell less the nucleus (and its ground substance the nucleoplasm). The free surface of certain
CLayers of flatter end vesicles in which protein in various stages of construction may be transported. Often studded with ribosomes (rough ER), smooth ER is believed to be involved in the production of steroid molecules.
Dgranules of RNA where the actual linking of protein subunits is believed to take place.
Elayers of flattened vesicles whose ends are rounded giving the appearance of a vesicle-budding process. Protein is believed to be stored and concentrated here, contained within the vesicles that bud off to stream though the cytoplasm.
FMembrane lined structures saturated with complex enzyme systems whose activities result in the production of energy for cell operations. Cell respiration (utilisation of oxygen and formation of carbon dioxide and water also occurs here)
GMembrane lined containers of various compounds in transit through the cell. They may fuse with lysosomes or they may be rapidly incorporated into the cell membrane, which rapidly ejects the contents to the outside extracellular fluid (exocytosis). Introduction of fluids / solids into the cell interior by the same mechanism (endocytosis) is called pinocytosis / phagocytosis
HMembrane lined containers of enzymes, which merge with vacuoles holding certain foreign material or cell debris and disintegrate the contents. The digested contents are usually ejected through the cell membrane.
Ia pair of barrel like cylinders that are believed to produce during cell division the asters and spindle upon which chromosomes travel to opposite poles of the dividing cell