Question

The RNA components of ribosomes are synthesized in the ________.

a. cytoplasm

b. nucleus

c. nucleolus

d. endoplasmic reticulum

Short answer

Because chromatin is present in the nucleolus, it is specialized for the synthesis and assembly of rRNA.

Step-by-step solution

step-1: Introduction

Ribosomal proteins and ribosomal RNA make up ribosomes (rRNA). Ribosomes are made up of around 40% protein and 60% rRNA in prokaryotes. Ribosomes in eukaryotes are roughly half protein and half rRNA.

Step-2: Explanation of correct answer

Nucleolus (option c). Ribosomes include structural and catalytic rRNAs, as well as a variety of polypeptides. It is a component of the cell's nucleus that contains chromatin, which is responsible for the creation of fibrils containing RNA via ribosomal RNA. The nucleolus is where rRNAs are synthesized and assembled.

step-3: Explanation of incorrect answers

Cytoplasm is option (a). Cytoplasm is a thick gel-like fluid that surrounds the nucleus and other cell organelles in a cell. It functions as a container for genetic materials. The cytoplasm of a cell contains enzymes that aid in the metabolism of macromolecules while also giving the cell its structure.

Nucleus (option b). The nucleus is a component of the cell that contains hereditary material and is responsible for a variety of cell functions such as protein synthesis and cell division (reproduction). Only eukaryotic cells have a nucleus.

Endoplasmic reticulum (option c). It's in charge of getting protein and lipids from one organelle to the next. During cell division, it aids in the creation of protein, lipid-like molecules, and the development of the nuclear membrane.