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Tour of Cell
Chapter 7
| Question | Answer |
|---|---|
| What is resolving power for? | Image clarity |
| What is only in a pro cell? | Nucleoid- No membrane seperates it from the rest of the cell |
| Where is DNA located? | Nucleoid |
| What don't pro cells have that euk do? | Don't have: Mitochondria, vacuoles, ER, chloroplast, nucleus, cytoskeleton |
| Are structures in a prokaryotic cell membrane bound? | No |
| What is only in a eukaryotic cell (not in pro)? | Chloroplast, Mitochondria, Vacuole, Nucleus, ER, Nuclear Envelope, Cytoskeleton |
| Where is DNA located in a euk cell? | Nucleus |
| Where are chromosomes located in a euk cell? | Nuclear envelope |
| Are euk cells membrane bound? | Yes |
| Electron Microscopes focus what? | They focus through specimen |
| TEM study what? | TEM study internal ultrastructure of the cell |
| SEM | Surface studying - excites electrons on the surface film of gold |
| What is in both euk and pro cells? | Ribosomes, DNA, chromosomes, cytosol, cell membrane |
| What does plasma membrane contain? | Glycoprotein, phospholipid, cholesterol, transport protein |
| What does a plasma membrane NOT contain? | Nucleic acid |
| What does pro mean? | Before the nucleus |
| An ex of pro cell: | Bacterium |
| If penicillin inhibits bacterial cell wall construction: why does it die? | Water enters the bacterial cell- swell and rupture |
| Cytoplasm of euk cell contains: | Water, dissolved nutrients, organelles, enzymes |
| Passage of materials into and out of the nucleus | Is unrestricted for very small molecules, but tight for large |
| Not DNA | Nucleosome |
| DNA has | Chromatin, chromosome, nucleotide, and colored bodies |
| What is not in nucleus? | Mitochondria |
| If you found a cell with large amounts of ER it could mean: | Large quantities of enzymes for biological processes are manufacture by that cell. Nuclear membrane is made by cell. Proteins for export are made. |
| If you found a cell with large amounts of ER it could NOT mean: | Membrane lipids are produced |
| An organelle capable of synthesis of old or worn out nuclear membrane is the: | ER |
| Not component of euk nucleus: | Centrioles |
| ER makes | Lipids and testosterone |
| What is composed primarily of protein? | Cytoskeleton |
| Which kingdom has organisms with chloroplasts | Protista and Plantae |
| Evidence that Mito could have been free living | Produce ATP and contain own DNA |
| Chlorophyll is found in | Thylakoid membrane |
| In metabolically active cells, expect to find large amounts of: | Mitochondria |
| What does a cell do with a defective organism? | Lysosome digests it |
| Anaerobic metabolism: | Occurs in the cytosol |
| Which part of cell is used for cell division? | Cytoskeleton |
| Actin and myosin are examples of | Microfilaments |
| Actin and myosin are associated with skeletal contractions. These microfils also have been located in | All other euk cells |
| What is in cytoskeleton? | Tubulin, Actin, Myosin |
| What is not associated with cyto? | Keratin |
| The filaments for moving organelles | Microtubules |
| What happens if cilia is removed surface of cell and immediately place in a solution containing energy yielding molecules? | The cilia continue to show movement. |
| Paramecium cannot move- what is NOT a logical hypothesis as to why? | It has very few golgi bodies. |
| Paramecium cannot move- what IS a logical hypothesis as to why? | It failed to produce cilia, lacking basal bodies, low # of mito, its microtubules organizing center are not functioning. |
| Where in a unicellular organism would you expect to find the most mito? | Area surrounding basal body. |
| Cell fractionation separates what? | Major organelles of the cell so individual function can be studied |
| Blender: | Homogenizes and breaks up cell and then go to centrifuge to separate into supernatant and pellet |
| Cells are separated by | Centrifuge |
| Top of solution after centrifugation: | Supernatant (lighter molecules) |
| Bottom of solution after centriguation: | Pellet (heavier molecules) |
| What is the nuclear side of the envelope lined by? | Nuclear lamina |
| What is the nuclear lamina? | Network of intermediate fibers- maintain shape of neuc |
| Within nucleus, the DNA and associated proteins are organized into fibrous material | Chromatin |
| 23 chromosomes | Sex cells |
| 46 chromosomes | A typical human |
| Nucleolus makes what? | Ribosomes |
| How does nucleolus make ribos? | Ribosomal rRNA made and assemble with protein from cyto to from ribsomes |
| Ribsomes contain what? | rRNA and protein |
| Non dividing cell | Chromatin |
| Dividing cell (spindles) | Chromosome |
| Some ribosomes are suspended in cyto and make proteins that function with cytosol called: | Free ribosomes |
| Other ribosomes attach to ER and the protein goes to golgi apparatus called: | Bound ribosomes |
Created by:
lizthomson
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