I need the whole page please s. If a membrane protein forms a channel and allows

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I need the whole page please s. If a membrane protein forms a channel and allows a polar molecule to cross the membrane 1 from a side without the use of energy, that process is called where the molecule has a high concentration to a side where it has low concentration A) passive transport B) faciliated transport C) active transport D) osmosis E) endocytosis 19. Which of the following is NOT an L-amino acid? coo A) coo C) D) E) 20. Considering the side chain (R group) ONLY, which of the following pairs of amino acids have the most similar chemical properties? A) R and G B) Dand K C) V and L D) Sand F E) H and F 21. Which of the following amino acids is the most likely to be located on the interior ofa globular protein? A) Lysine B) Serine C) Phenylalanine D) Aspartic acid E) Arginine For questions 22 through 24 consider the structure of a peptide shown to the right. 22. What is the identity of the amino acid at the C-terminus of this peptide? A) asparagine B) cysteine C) isoleucine D) leucine E) serine 23. How many peptide bonds are in the peptide? A)1 B)2 C)3 D)4 E)5 24. What color will you observe if this peptide is treated with the biuret agent? A) light blue B) lavender/light purple C) orange D) bright green E) no color 25. what type of bonding maintains a-helices and -sheets found in proteins? A) covalent B) dipole-dipole C) dispersion forces D) hydrogen bonds E) ionic Page 4 of 14

Explanation / Answer

Ans 18 : B) facilitated transport

The transport involves the use of integram mebrane protein to transfer the solute particle from region of high concentration to lower concentration without the use of energy.

Since it does not require energy it is different from the active diffusion , and uses protein channels so different from passive diffusion.

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