5 Written questions
5 Matching questions
- scanning electron microscope
- transmission electron microscope
- light microscope
- electron microscope
- a visible light is passed through the specimen and then through glass lenses
- b an electron beam scans the surface of the sample. The beam excites electrons on the surface and these secondary electrons are detected. The result is the image
- c the interior of a prokaryote cell
- d used to study the internal ultra structure of cells.
- e focuses a beam of electrons through the specimen or onto its surface.
5 Multiple choice questions
- a netlike array of protein filaments that maintains the shape of the nucleus by mechanically supporting the nuclear envelope
- encloses the nucleus, separating its contents from the cytoplasm.
- develops by the coalescence of smaller vacuoles themselves derived from the GA and ER.
- consists of a network of membranous tubules and called cisternae. Site for protein synthesis.
- a semi fluid, jellylike substance
5 True/False questions
glycoproteins → complexes mad of ribosomal RNA and protein
plasma membrane → surface lacks ribosomes
contractile vacuoles → pump excess water out of the cell, thereby maintaining a suitable concentration of ions and molecules inside the cell
vesicles → sacs made of membrane
rough er → surface has ribosomes