41. What is the name of the amino acid shown below? ÇOO HN- ČH,SH A L-cysteine B D-cysteine C L-serine D D-serine

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41. What is the name of the amino acid shown below?
ÇOO
H,N-
CH,SH
A L-cysteine
B D-cysteine
C L-serine
D D-serine
42. How is a dipeptide formed?
A The -NH3"group of one amino acid forms an amide bond with the -NH3"
group of another amino acid and the elements of H2 are removed.
B The -NH;group of one amino acid forms an amide bond with the carboxylate (-
COO") of another amino acid, and H20 is removed.
C The carboxylate (-COO") group of one amino acid forms an amide bond with the
carboxylate (-CO0) of another amino acid, and the elements of O2 are removed.
D The carboxylate (-CO0") group of one amino acid forms an amide bond the -NH:
group of another amino acid, and the elements of Ha are removed.
Transcribed Image Text:41. What is the name of the amino acid shown below? ÇOO H,N- CH,SH A L-cysteine B D-cysteine C L-serine D D-serine 42. How is a dipeptide formed? A The -NH3"group of one amino acid forms an amide bond with the -NH3" group of another amino acid and the elements of H2 are removed. B The -NH;group of one amino acid forms an amide bond with the carboxylate (- COO") of another amino acid, and H20 is removed. C The carboxylate (-COO") group of one amino acid forms an amide bond with the carboxylate (-CO0) of another amino acid, and the elements of O2 are removed. D The carboxylate (-CO0") group of one amino acid forms an amide bond the -NH: group of another amino acid, and the elements of Ha are removed.
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