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Home⇒ Medical Science⇒ Biochemistry⇒ Structure and properties of amino acids
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Which of the following amino acid contain an imidazolium moiety? Histidine [other wrong options] [Discuss in forum] Alanine Valine Cysteine |
Q22 ⇒ Which amino acid when exposed to ninhydrin produces a brown color? Asparagine [other wrong options] [Discuss in forum] Proline Alanine Valine |
Q23 ⇒ Which of the following amino acids can form hydrogen bonds with their side (R) groups? All of these [other wrong options] [Discuss in forum] Asparagine Aspartic acid Glutamine |
Q24 ⇒ Which pair of amino acids absorbs the most UV light at 280 nm? Trp & Tyrosine [other wrong options] [Discuss in forum] Threonine & Histidine Cystein & Asparagine Phenylalnine & Proline |
Q25 ⇒ How many different amino acids are there? 20 [other wrong options] [Discuss in forum] 3 100 An infinite number |
Q26 ⇒ The α-amino acids have a carboxyl group with a pK around __________ , and an amino group with a pK near __________ . 2.2, and 9.4 [other wrong options] [Discuss in forum] 1.1, and 12.1 6.5, and 8.0 3.3, and 10.5 |
Q27 ⇒ When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes a zwitterions [other wrong options] [Discuss in forum] a cation nonpolar an isotope |
Q28 ⇒ D-Alanine and L-Alanine are technically known as enantiomers [other wrong options] [Discuss in forum] anomers epimers polymer |
Q29 ⇒ Which of the following is not a sensible grouping of amino acids based on their polarity properties? Asp, Ile, and Pro [other wrong options] [Discuss in forum] Ala, Leu, and Val Arg, His, and Lys Phe, Trp, and Tyr |
Q30 ⇒ Serine and threonine are polar amino acids due to reactive hydroxyl group in the side chain [other wrong options] [Discuss in forum] reactive alcoholic group in the side chain reactive keto group in the side chain reactive aldehyde group in the side chain |
Q31 ⇒ Which amino acids would most likely reside in the membrane-anchoring domain of a membrane embedded protein? Isoleucine, valine and phenylalanine [other wrong options] [Discuss in forum] Phenylalanine, valine, and aspartate Leucine, threonine, and lysine Lysine, arginine and histidine |
Q32 ⇒ Which of the following amino acid is known as half-cystine residue? Cysteine [other wrong options] [Discuss in forum] Isoleucine Valine Histidine |
Q33 ⇒ The sulphur containing side chain of cysteine is hydrophobic, highly reactive and capable of reacting with another cysteine [other wrong options] [Discuss in forum] ampiphillic, highly reactive and capable of reacting with another cysteine hydrophillc, highly reactive and capable of reacting with another cysteine none of the above |
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