Answer:
d. smooth endoplasmic reticulum
Explanation:
Organelles are structures found in inside the cell which carries out a specific function. Types of organelles include endoplasmic reticulum, Golgi body, ribosomes, nucleus etc. The function in the question is protein synthesis.
Ribosomes are the sites of protein synthesis in the cell of living organisms.
- The nucleus is involved in the synthesis of protein because it directs all the cellular processes in a cell including protein synthesis.
- Rough endoplasmic reticulum (RER) is a type of endoplasmic reticulum whose surface is attached to by ribosomes, hence, giving it its rough surface. Since ribosomes (organelle for protein synthesis) are attached to the RER, the RER are involved in protein synthesis.
- Golgi bodies are organelles that functions to package, process and sorted the proteins produced in the ribosomes.
- The smooth endoplasmic reticulum (SER) are NOT involved in the synthesis of protein because they have no ribosomes attached to their surface. Instead, they are involved in lipid synthesis.
The following organelles are not involved in protein synthesis - d. smooth endoplasmic reticulum
The protein formation begins in the nucleus where the DNA (deoxyribonucleic acid) is transcribed into the mRNA. After transcription, the mRNA undergoes translation in the ribosomes it modifies with help of Rough endoplasmic reticulum
This newly formed protein is then transported by the rough endoplasmic reticulum (RER) to the Golgi apparatus inside a vesicle. The Golgi apparatus packages these proteins and targets them in different parts of the cell. sER is a membrane-bound network of tubules without surface ribosomes. sER is not involved in protein synthesis.
Learn more about protein synthesis:
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