The Cell Quiz: Basic Knowledge Test!

Explanation
The nucleus is often referred to as the brain of the cell because it contains the cell's genetic material, DNA, and controls the cell's activities. It regulates gene expression and coordinates cellular functions, making it essential for cell growth, reproduction, and overall cell function. The nucleus also plays a crucial role in the transmission of genetic information to future generations.

Explanation
Organelles in eukaryotic cells are bound by a membrane for compartmentalization and division of labor. This allows different organelles to have separate environments and perform specific functions without interference from other organelles. By creating compartments, the cell can efficiently carry out different biochemical processes simultaneously. This organization enables specialization and enhances the overall efficiency and functionality of the cell.

Explanation
In prokaryotic cells, DNA is not enclosed within a nucleus or bound by a nuclear membrane, which means it is not associated with histone proteins. This lack of association allows the DNA to be freely floating within the cytoplasm, making it "naked". Therefore, the statement that DNA in prokaryotic cells is naked is true.

Explanation
The given statement is false. Bacteria cells are actually prokaryotic, not eukaryotic. Prokaryotic cells, like those of bacteria, lack a nucleus and other membrane-bound organelles. They have a simpler structure compared to eukaryotic cells, which have a nucleus and various organelles enclosed within membranes.

Explanation
This statement is incorrect because not all cells have a cell wall. While plant cells have a cell wall, animal cells do not. Animal cells have a cell membrane instead. Therefore, the correct answer is false.

Explanation
All living organisms are made up of cells, including grass, ants, and elephants. Cells are the basic building blocks of life and carry out various functions necessary for the organism's survival. They provide structure, perform metabolic processes, and enable reproduction. Therefore, it is true that grass, ants, and elephants are all made of cells.

Explanation
Mitochondria are known as the "power house" of the cell because they are responsible for generating energy in the form of ATP through the process of cellular respiration. This organelle contains its own DNA and is involved in various metabolic processes, including the production of ATP, which is essential for the functioning of the cell. Therefore, the statement "Mitochondria are the 'power house' of the cell" is true.

Explanation
Vacuoles are primarily responsible for storing water, ions, and nutrients in plant cells. While they can also store other substances such as pigments and toxins, proteins are mainly synthesized and stored in other organelles like the endoplasmic reticulum and Golgi apparatus. Therefore, the statement that vacuoles store proteins is false.

Explanation
Bacteria is an example of a prokaryotic cell because they lack a nucleus and other membrane-bound organelles. Prokaryotic cells, such as bacteria, have their DNA floating freely in the cytoplasm and are generally smaller and simpler in structure compared to eukaryotic cells.

Explanation
Prokaryotes are single-celled organisms that lack a nucleus and membrane-bound organelles. They are typically unicellular and do not form multicellular structures. Therefore, the statement "Often prokaryotes are multicellular" is false.