Biology assignment

Home work-2

Answer all the questions.

Be specific and precise in your answers. Please do not write ‘you know what I mean’ kind of answers.

Total points: 50

Questions:

1) What are the four macromolecules in biological systems? (4 points)

2) Give examples of monosaccharides, disaccharides and polysacchairides. (3 points)

3) What are the monomeric forms of proteins, DNA and RNA ? (3 points)

4) What are the three components in phospholipids? (2 points)

5) Describe the 8 components on prokaryotic cells that we discussed in the class. (8 points, name them and write 1-2 sentences on each component)

6) What is/are the difference(s) between: (i) nucleus versus nucleoid (5 points); (ii) Chromosomes versus chromatin (5 points).

7) What are the four components of nucleus in eukaryotic cell that we discussed in the class? (4 points)

8) Describe are the six components of the endomembrane system? (6 points, name them and write 1-2 sentences on each component)

9) Explain the difference between the function of an adhesion, gap and tight junction. (5 points)

10) Distinguish between the roles of the various integral proteins in the plasma membrane. (5 points)

11) Explain the movement of molecules in diffusion and osmosis. (think of concentration gradient, membrane, solute and water) (5 points)

12) What happens when a RBC (red blood cell) is placed in : (a) isotonic solution; (b) Hypertonic solution; and (c) hypotonic solution. Explain your answer (use scientific words like osmosis, diffusion, solute, solvent, cytoplasm in your sentences) (10 points)