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TLS Online TPP Program

#Question id: 361

Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.

#XL - S Microbiology

  1. 90%

  2. 95.2%

  3. 89.4%

  4. 5%

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TLS Online TPP Program

#Question id: 182

#XL - T Zoology

Which amino acid is least likely to participate in acid-base catalysis?
TLS Online TPP Program

#Question id: 183

#XL - T Zoology

At pH 7.0, converting a glutamic acid to gamma-carboxyglutamate, will have what effect on the overall charge of the protein containing it?
TLS Online TPP Program

#Question id: 184

#XL - T Zoology

What is the approximate charge difference between glutamic acid and alpha-ketoglutarate at pH 9.5?
TLS Online TPP Program

#Question id: 185

#XL - T Zoology

Match the amino acids with their correct functional group:

1. Indole

i. Histidine

2. Imidazole

ii. Tryptophan

3. Thiol

iii. Cysteine

4. Pyrrolidine

iv. Proline


TLS Online TPP Program

#Question id: 186

#XL - T Zoology

What will be the net charge on given peptide at pH 5?
TLS Online TPP Program

#Question id: 186

#XL - P Chemistry

What will be the net charge on given peptide at pH 5?