Someone already illed in the information for a table comparing bacterial cells v

Question

Someone already illed in the information for a table comparing bacterial cells vs. eukaryotic cells regarding their surfa to-volume ratios (SN). Assuming that both types of cells are spherical, the bacterium has a diameter of 1 um, cell has a diameter of 15 um. The last column includes the internal membranes of the cell in the calculation of sur the aninm area, assuming internal membranes with 15 times the area of the plasma membrane. The volume of a s - 4pra/3 and its surface by S-4pr2, where r is its radius. phere is given Volume SN SN +internal Diamete Surface area Cell Bacterium Eukaryote membrane area (ums) 0.524 1767.15 6.04 15 0.4 Calculate the value for the grayed table cell. Pay attention to all details on the table's heading. A) 640 B) 64.0 C) 6.4 D) 0.64 E) My result is different Phe or F) (Met, 0, M) 45. Consider the formulas above. Oligosaccharides are short sugar polymers that can become covalently linked to proteins and lipids through condensation reactions. These modified proteins and lipids are called glycoproteins and glycolipids modification? A) Serine Within a protein, which of the amino acids shown on the right, do you think is the most probable target for this type of B) Glycine D) Methionine E) None of these Gin, or Q Glu, or E Hi 46. The formulas for the a-L-amino acids glutamine and glutamic acid are shown in the figure above. They differ only in the structure of their side chains (circled). possible for glutamine? At pH 7, what type of interactions can glutamic acid partiolpate in that are not A) lonic bonds (salt bridges) B) Hydrogen bonds C) Van der Waals interactions D) Covalent bonds

Explanation / Answer

44- Bacteria doesn't have any internal membrane as they don't have any organelles.

Surface area is equal to the area of the plasma membrane

Given that the area of internal membrane is 15 times that of the plasma membrane. So, the area of the internal membrane will be 706.86*15 =10602.

So the answer is 10602+.4 = 10602.4

45- Condensation reaction involves the release of Water molecules. In case of condensation reaction two -OH group reacts and leads to the formation of -O- bond.

If we look at the amino acids we will find that only serine and threonine are the two amino acids that can undergo the condensation reaction.

So the answer is option A - serine

46- At pH 7 net charge on glutamic acid is -1 which allows it to form ionic interaction with the amino acid which has positive charge whereas as pH 7 Glutamine has no net charge so ti cannot form the ionic bond with another anino acid

So the answer is option A - Ionic interaction (Salt bridge)

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