Question

write in the functions of each organelle
describe the function of each organelle.
nucleus
endoplasmic reticulum
ribosome
golgi apparatus

Explanation:

• Nucleus: It is the control center of the cell. It contains the cell's genetic material (DNA) which directs all cellular activities such as growth, metabolism, and reproduction.
• Ribosome: These are the sites of protein synthesis. They read the messenger RNA (mRNA) sequence and assemble amino acids into polypeptide chains (proteins) based on the genetic code.
• Endoplasmic reticulum:
• Rough ER: Has ribosomes attached to its surface. It is involved in the synthesis, folding, and modification of proteins. The proteins made here are often destined for secretion or for use in the cell membrane.
• Smooth ER: Lacks ribosomes. It is involved in lipid synthesis (such as phospholipids for the cell membrane), detoxification of drugs and poisons in liver cells, and storage of calcium ions (important for muscle contraction in muscle cells).
• Golgi apparatus: It modifies, sorts, and packages proteins and lipids. Proteins from the ER are further processed here (e.g., addition of sugar groups - glycosylation). It then packages them into vesicles for transport to their final destinations, which can be within the cell (e.g., lysosomes) or outside the cell (secretion).

Answer:

• Nucleus: Control center of the cell, contains DNA.
• Ribosome: Site of protein synthesis.
• Endoplasmic reticulum: Rough ER - protein synthesis and modification; Smooth ER - lipid synthesis, detoxification, calcium storage.
• Golgi apparatus: Modifies, sorts, and packages proteins and lipids.