43) How do a liver ell nd a brain cell äife rom ons RNA and prote merent protein

Question

43) How do a liver ell nd a brain cell äife rom ons RNA and prote merent proteins from one another moteins bering produced Have different DNA resulting in diff 2. 1. s being RNA and 3. Ha Have the sNA produce the same mRNA, resulting in different proteins ve the same DNA, the same mRNA and the same proteins Have the same DNA, different mRNA and different proteins 44) Which solute would diffuse the fastest in solution; an amino acid or a 1 impossible to predict, because it would depend on the protein structure and folding 2. bot 3. a protein because they are really small 4 an amino acid, because of being smaller h would move at similar speeds because of their small sizes 45) What is the osmolarity of a solution containing 0.2 M glucose? 1. 0.4 mOsm/1 2. 0.2 mOsm/1 3 200 mOsm/ 400 mOsm/1 46) What is the tonicity of a solution containing 75 mM glucose and 75 mM CaClk? 1. 2. 3. 4. 300 mOsm Hypertonic; cells will shrink Hypotonic; cells will swell Isotonic; cells will not change 47) A cell is placed in a 150 mOsm/1 solution. What will happen to ir? 1. 2. 3. The cell is in iso-osmotic (equal osmolarity) conditions. Nothing will happen. Fewer solute molecules will interfere with H:O movement in the inward direction. Water will flow out of the cell, and the cell will shrink. More solute molecules will interfere with HO movement in the inward direction. Water will flow out of the cell, and the cell will shrink. 4. More solute molecules will interfere with H:0 movement in the outward direction. Water will flow into the cell, and the cell will swell. 48) A solution "A" is hyperosmotic relative to a solution "B" that contains 100 mM CaCh. Is "A" hypertonic, hypotonic or isotonic? > Hypertonic. 2. Isotonic. 4. "B" is hypotonic, but "A" is hyperosmotic relative to "B", so "A" could be hypertonic, hypotonic or isotonic. No way to know! 49) The volume of a red blood cell will remain unchanged in 1. distilled water, a isotonic solution 2 150 mM NaCI, an isotonic solution 3. 150 mM glucose, an isotonic solution 4. 150 mM MgClz, an isotonic solution 5 50) What is/are the major difference(s) between cytosol and extracellular fluid? 1. Cytosol has a higher concentration of sodium ions. 2. Cytosol has fewer proteins. 3. Cytosol has a higher concentration of potassium ions. 4- All of the above.

Explanation / Answer

43) answer D is correct

44)answer D is correct amino acid is smaller

45) correct answer is B because osmolarity is moles present in per litre of solution .

46)

47) correct answer in D

49) correct answer is B

50) correct answer is C because k concentration is more concreted than outside.

48) correct answer is A

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