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Cell structure Ch7
Question | Answer |
---|---|
What is a compound microscope | A compound microscope uses two lenses, an objective lens and an eye piece lens |
What does a compound microscope use | Light |
What is an electron microscope | Uses a beam of electrons |
Name two types of electron microscopes | Transmission Electron Microscope(TEM) Scanning Electron Microscope (SEM) |
What does a TEM do | Shoes internal structure |
What does a SEM do | |
Provides surface view | |
Name the parts of an animal cell as seen on an electron microscope | Cell(plasma) membrane Nucleus and cytoplasm which make up the protoplasm . |
What is protoplasm | All living parts of a cell |
What is cytoplasm | All living material in a cell outside the nucleus |
Name the parts of the plant cell as seen under electron microscope | Cell wall Cell membrane Nucleus Chloroplasts Vacoule Cytoplasm |
Where is cell mambrabe found | Directly inside cell wall |
What is cell of plasma membrane composed of | Phospholipids and protein |
What are the functions of a membrane | Retain the cell content Recognise molecules that touch them Give some support to the cell Selectively permeable |
What is the nucleus | Control centre of cell |
What are genes | Units of inheritance |
What chromattin | Name given to chromosomes when they are not dividing |
Where are ribosomes made | Nucleolus |
What is cytoplasm | The jellylike liquid in the cell that surrounds the nucleus |
Where is the site of respiration | Mitochondria |
Name two diferences between a plant and animal cell | Plant have the following but animal dont Cell wall Chloroplasts Chrophyll Large vacoule |
What are prokaryotic cells | Prokaryotic cells do not have a nucleus or membrane-enclosed organelles eg mitochondria |
What are eukaryotic cells | Eukaryotic cells have a nucleus and cell organelles all of which are enclosed by a membrane eg mitochondria |