MN 551 Unit 1 exam questions with answers

MN 551 Unit 1 exam questions with
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answers

Cell - CORRECT ANSWERS ✔✔smallest functional unit that
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has the characteristics necessary for life
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- exchange materials with their environment
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- obtain energy from nutrients
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- make complex molecules
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- some can replicate themselves
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Tissue - CORRECT ANSWERS ✔✔cells combine to form
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tissues based on their embryonic origin; then the tissues
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combine to form organs |\ |\ |\




eukaryotic cells - CORRECT ANSWERS ✔✔made up of |\ |\ |\ |\ |\ |\ |\ |\



internal membrane-bound compartments called
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organelles
Contain: nucleus, cytoplasm, cell membrane|\ |\ |\ |\




organelles - CORRECT ANSWERS ✔✔small organs within a |\ |\ |\ |\ |\ |\ |\



cell
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example: nucleus |\

, prokaryotes - CORRECT ANSWERS ✔✔do not contain |\ |\ |\ |\ |\ |\ |\



membrane-bound organelles |\




example: bacteria |\




protoplasm - CORRECT ANSWERS ✔✔composed of: |\ |\ |\ |\ |\




- water: makes up 70-85% of the cell's protoplasm
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- proteins: makes up 10-20% of the cell's protoplasm
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- lipids: makes up 2-3% of the cell's protoplasm
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- carbohydrates: makes up 1% of the cell's protoplasm
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- electrolytes: small amounts present
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Proteins - CORRECT ANSWERS ✔✔Proteins are polar and
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hydrophilic (water loving), making them soluble in water.
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Examples of proteins include enzymes necessary for
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cellular reactions, structural proteins, ion channels, and
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receptors.1 Proteins can be bound to other substances to
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form nucleoproteins, glycoproteins, and lipoproteins.
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Lipids - CORRECT ANSWERS ✔✔Lipids are nonpolar and
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hydrophobic (water fearing), making them insoluble in |\ |\ |\ |\ |\ |\ |\



water. They are the main parts of cell membranes
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surrounding the outside and inside of cells. Examples of |\ |\ |\ |\ |\ |\ |\ |\ |\



lipids include phospholipids and cholesterol. Some cells
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also contain large quantities of triglycerides. In fat cells,
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triglycerides can make up as much as 95% of the total |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\