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BIO 121-Ch 6
Chapter 6
| Question | Answer |
|---|---|
| What is the cell theory? | The smallest unit of life is the cell. All cells come from other cells. |
| Consists of phospholipids; boundary of cell. | Plasma membrane |
| Semifluid substance inside the cell. | Cytosol |
| Only present in eukaryotic cells | Nucleus |
| carry genes | chromosomes |
| synthesize proteins | ribosomes |
| Bacteria and plant cells have ________. | cell walls |
| Structures for movement. | Flagella |
| Used to connect with other bacteria or to connect to a surface. | Frimbriae |
| What is an example of frimbriae? | plaque on teeth. |
| DNA is located in the ____________. | nucleus. |
| Eukaryotic cells have ____________-_____________ organelles. | Membrane-bound |
| ______________ is located in the region between the plasma membrane and the nucleus. | Cytoplasm |
| Are eukaryotic cells smaller or larger than bacteria cells? | Larger |
| How large are most bacteria cells? | 5 micrometers |
| _____________ ________________ set upper limits on the size of cells. | Metabolic requirements |
| Surface area to _______________ ______________ of a cell is critical. | volume ratio |
| The cell has _______ chromosomes. | 46. |
| What is a diploid? | 1 set of chromosomes from father, 1 set from mother. |
| Plant cells contain the central _____________. | vacuole |
| ____________% of cell water is in the vacuole. | 60 |
| The central vacuole balances ____________ and ___________ content and supports ____________ ____________. | mineral, water, cell structure |
| The cell wall contains ______________________, which are narrow channels that act as intercellular cytoplasmic bridges to facilitate communication and transport of materials between plant cells. | Plasmodesmata |
| Plasmodesmata are _____________ ____________ that act as intercellular cytoplasmic bridges to facilitate communication and transport of materials between plant cells. | narrow channels |
| Plasmodesmata are narrow channels that act as ______________ ___________ __________ to facilitate communication and transport of materials between plant cells. | intercellular cytoplasmic bridges |
| Plasmodesmata are narrow channels that act as intercellular cytoplasmic bridges to facilitate _______________ and __________ of materials between plant cells. | communication, transport |
| Describe endosymbiotic theory. | Chloroplasts and mitochondria might have been separate prokaryotic cells many years ago. At some point, they might have been engulfed by eukaryotic cells. |
| Do male or female cells pass on mitochondria? | female |
| Capture hydrogen proteins and combine with oxygen to form hydrogen peroxide, then break down into water. | Peroxisomes |
| Clean up cell; very acidic. | Lysosomes |
| Which disease is characterized by the malfunction of lysosomes? | Tay Sachs |
| Sends out information to right place in the cell. | Golgi apparatus |
| Studded with ribosomes. Protein synthesis site | Rough ER |
| Detoxes, synthesizes materials | Smooth ER |
| What are four functions of smooth ER? | Synthesize lipids, metabolize carbohydrates, detoxes drugs and toxins, stores calcium ions. |
| Process in which a cell engulfs another cell and forms food vacuole | Phagocytosis |
| Which vacuole pumps water out of cells? | Contractile vacuole |
| Which vacuole holds minerals and water? | Central vacuole. |
| Name and describe two chloroplast structures. | Thylakoids: membranous sacs; Stroma: internal fluid |
| _____________: a network of fibers extending throughout cytoplasm. Organizes the cell's structure and activities, anchoring many organelles. Regulates many biochemical activities. | Cytoskeleton |
| What three types of molecular structures compose the cytoskeleton? | Microtubules, microfilaments, intermediate filaments |
Created by:
JenLynFin
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