The signal peptide sequence
(I)is often used to direct proteins to the lysosome for incorporation into the lysosome.
(II)is usually not used for small eukaryotic proteins.
(III)of some transmembrane proteins is embedded into the membrane as an anchor.
(IV)is usually cleaved off the completed protein.
A)I,IV
B)I,II,IV
C)II,III,IV
D)I,III,IV
E)I,II,III,IV

Question

Quizplus · Accepted Answer

Option I is true as the signal peptide sequence directs proteins to the lysosome for incorporation. Option II is false as the size of the protein doesn't determine the use of a signal peptide sequence. Option III is true as the signal peptide sequence of some transmembrane proteins is embedded in the membrane as an anchor. Option IV is true as the signal peptide sequence is usually cleaved off the completed protein. Therefore, options I, III, and IV are correct, making option D the correct answer.

The Signal Peptide Sequence