Question

question 5 (1 point)
endoplasmic reticulum

1. carbohydrates
2. proteins
3. nucleic acids
4. lipids

Explanation:

The endoplasmic reticulum (ER) has two types: rough ER (with ribosomes) and smooth ER. Rough ER is involved in protein synthesis (ribosomes on it make proteins, and the ER helps process them). Smooth ER is involved in lipid synthesis (like phospholipids for cell membranes, steroid hormones, etc.). While some carbohydrate metabolism can occur in ER, the primary and well - known macromolecules associated with ER synthesis are proteins (by rough ER) and lipids (by smooth ER). Among the options, proteins (2) and lipids (4) are correct as the endoplasmic reticulum is involved in the synthesis of proteins (rough ER) and lipids (smooth ER).

Answer:

1. Proteins, 4) Lipids