True or False. Read the following statements and indicate whether the statement

Question

True or False. Read the following statements and indicate whether the statement is true or false. For extra credit explain how the false statements are not true. Lipids may be amphiphilic. Ramachandran plots show that AMONG peptides made of the same amino acid (for example polylysine), a peptide made of glycine, which has the smallest side chain, has the largest combinations of allowable phi and psi angles. A peptide made of tryptophan, which has the bulkiest side chain, has the fewest combinations of allowable phi and psi angles. The Bohr effect describes the observation that a decrease of pH increases the binding affinity of O_2, because H^+ ions bind to His residues in hemoglobin and stabilize the oxygen binding form of hemoglobin. An alpha helix is the same as a 3.6_13 helix. The A band in a sarcomere contains a region where the thick and thin filaments do not overlap. Bacterial flagellum contains different motors that allow the bacteria to move in a straight line or change direction.

Explanation / Answer

Answer:

1) Lipids may be amphiphilic - TRUE (Lipid molecules are amphiphilic - that means they have both hydrophobic as well as hydrophilic end.

2) A peptide made of glycine will have the largest combinations of allowable angles and a peptide made up of tryptophan which has the bulkiest side chain, has the fewest combinations of allowable angles - TRUE

3) The Bohr effect describes the observation that a decrease of pH increases the binding affinity of O2. because H+ ions bind to His residues in hemoglobin and stabilize the oxygen binding form of hemoglobin - FALSE (As the pH decreases, the affinity of hemoglobin for oxygen also decreases)

4) An alpha helix is the same as a 3.613 helix - TRUE (Alpha helix has 3.6 amino acids residues per turn of helix and hydrogen bonded loop contains 13 atoms.

5) The A band in a sarcomere contains a region where the thick and thin filament do not overlap - FALSE (I band contains region where the thick and thin filament do not overlap, thick and thin filaments overlap in A band.)

6) Bacteria flagellum contains different motors that allow the bacteria to move in a straight line or change direction - TRUE (run and tumble method)

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