Question

Describe the role of signal sequences in protein targeting to different cellular compartments.

10 Feb 2026
Answer :
Word Count : 298
Signal sequences are short stretches of amino acids present in proteins that act as molecular “addresses,” ensuring that proteins are transported to their correct cellular locations after or during synthesis. These sequences are usually found at the N-terminal end of newly synthesized proteins and are typically about 16–30 amino acids long. Their main function is to guide proteins to specific organelles such as the endoplasmic reticulum (ER), mitochondria, nucleus, peroxisomes, or to the extracellular _____ ______ ________ ____ ______ _________ ____ __________ ____.
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