Midterm2Practicekey_000

Midterm2Practicekey_000 - BILD1 Practice Questions for...

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Practice Questions for Midterm #2 8/23/08 1) Explain how a non-spontaneous reaction can be made to occur inside a cell (one sentence): An enzyme can use the energy released from a spontaneous reaction (exergonic) to drive a non- spontaneous (endergonic) reaction. 2) What is the major energy transfer molecule of a cell? (one word) ATP 3) What is the function of ribosomes that are bound to the ER? (i.e. What are they making?) They are making proteins that are destined for insertion into membranes, for packaging within organelles such as lysosomes, or for secretion from the cell. 4) What molecules are being synthesized by enzymes of the smooth ER? lipids – phospholipids and steroids 5) How are vesicles moved from one region of a cell to another – what components are used to move them? the vesicles are transported along microtubule “tracks”, by ATP-powered motor proteins (see Fig. 6.21) 6) What changes to membrane phospholipids would tend to make the membrane more fluid? a higher proportion of unsaturated fatty acids making up the phospholipids’ “tails” would cause the
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Midterm2Practicekey_000 - BILD1 Practice Questions for...

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