A pentapeptide consisting of amino acids with molecular weights of 165, 131, 75, 204 and 146 Da has an approximate molecular weight (in Da) of ..........
Show Hint
Correct Answer: 648
Solution and Explanation
Step 1: Add the molecular weights of the amino acids.
The molecular weights of the individual amino acids are given as 165, 131, 75, 204, and 146 Da. To find the approximate molecular weight of the pentapeptide, we sum these values:
\[
165 + 131 + 75 + 204 + 146 = 721 \, \text{Da}.
\]
Step 2: Conclusion.
The approximate molecular weight of the pentapeptide is 721 Da.
Top IIT JAM BL Biological Science Questions
- One of Koch's postulates states that the suspected causative organism should
- Archaebacteria differ from bacteria in
- Which one of the following, involving transfer of a phosphate group, is an example of substrate-level phosphorylation?
- Lysosomal targeting of proteins involves recognition of
- In vitro, group I introns have the ability to
Top IIT JAM BL Biochemistry Questions
- Which one of the following, involving transfer of a phosphate group, is an example of substrate-level phosphorylation?
- In polypeptide chains, the proline residue is unique in
- Many plasma glycoproteins are protected from uptake and degradation by the hepatocytes in liver due to the presence of a terminal saccharide moiety known as
Which one of the following matches is CORRECT between the inhibitors given in Group A with their modes of action in Group B?
\[\begin{array}{|c|c|} \hline Group A & Group B \\ \hline \text{(P) Antimycin A} & \text{(i) Inhibits cytochrome c oxidase} \\ \hline \text{(Q) Amytal} & \text{(ii) Blocks electron transfer from cyt b to cyt c1} \\ \hline \text{(R) Carbon monoxide} & \text{(iii) Inhibits adenine nucleotide translocase} \\ \hline \text{(S) Atractyloside} & \text{(iv) Prevents electron transfer from Fe-S centers of complex 1 to ubiquinone} \\ \hline \end{array}\]
- During synthesis of N-linked glycosylated proteins in mammalian cells, which one of the following compositions of sugars is originally added as a core through dolichol-phosphate precursor?
Top IIT JAM BL Questions
- One of Koch's postulates states that the suspected causative organism should
- Archaebacteria differ from bacteria in
- Which one of the following, involving transfer of a phosphate group, is an example of substrate-level phosphorylation?
- Lysosomal targeting of proteins involves recognition of
- In vitro, group I introns have the ability to