Question

What is known as the brain of a cell because it controls the activities of the cell?

A) Nucleolus
B) Ribosome
C) Nucleus
D) Golgi apparatus

Answer 1

The structure known as the "brain" or control center of a cell is the nucleus. The nucleus contains genetic material (DNA) that provides instructions for the synthesis of proteins and controls various cellular activities. The options provided are cellular structures, and out of them, the nucleus is the one responsible for controlling the activities of the cell. Therefore, the correct answer is:

C) Nucleus

Answer 2

The correct answer is C) Nucleus, which is the organelle that acts as the control center of the cell by housing DNA and overseeing the synthesis of ribosomes and proteins.

Step-by-step explanation:

The "brain of a cell" because it controls the activities of the cell is known as the nucleus. The nucleus is a large, spherical organelle that is the control center of the cell. It contains DNA in the form of chromatin and during cell division, this chromatin condenses into chromosomes.

The nuclear membrane encloses the nucleus, and it features pores to allow material to enter and exit. Within the nucleus is the nucleolus, which is involved in the production of ribosomes.

Cells such as muscle cells may contain multiple nuclei and are referred to as multinucleated. Conversely, some cells like red blood cells (RBCs) lose their nucleus during maturation to accommodate more hemoglobin. Therefore, the correct answer to the question is C) Nucleus.