Term
| Peripheral vs. Integral Proteins |
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Definition
Peripheral Proteins are attached to the membrane surface (examples: glycoproteins, glycolipids). These use glycolax as cell recogniton markers and restrict uptake of hydrophobics
Integral Proteins span the membrane |
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Term
| Major Plasma Membrane Lipid |
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Definition
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Term
| Function of cholesterol in plasma membrane? |
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Definition
| it increases membrane fluidity |
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Term
What is simple diffusion?
What molecules can pass by this process? |
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Definition
Things move from high to low concentration, no energy required.
The molecules that pass through are gases (CO2 and O2) and steroid lipid hormones. |
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Term
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Definition
| No energy is needed but a transporter/carrier is! |
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Term
| Nucleases, Phosphotases, Glycosidases, Esterases, and Protease are all examples of what? |
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Definition
Digestive Lysosomes.
These cleave bonds by adding components of water across the bond (hydolysis) |
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Term
| An optimal pH for lysosome hydrolase? How is it achieved? |
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Definition
pH= 5.5
This is achieved by vesicular ATPase pumping H+ to increase acidity. |
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Term
Smooth Endoplasmic Reticulum
v.
Rough Endoplasmic Reticulum |
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Definition
Smooth is involved in lipid synthesis, uses cyt P450 ezymes for steroid synthesis as well. Also stores glycogen
Rough is involved in protein synthesis and then sent to Golgi, where they can be modified. Modification includes adding GPI anchors and N-linked glycosylation |
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Term
| Function(s) of Microtubules |
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Definition
1. positons organelles in cytoplasm
2. moves vesicles
3. spindle apparatus in cell division
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Term
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Definition
| Kinesin and Dyneins. These use ATP to move within the cytoplasm (kinesin) or in the nucleus (dynein) |
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Term
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Definition
1. forms a network to control cell shape and cell surface movement
2. In muscle- binds with myosin to produce muscle contraction |
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