Smooth endoplasmic reticulum is responsible for detoxifying poison and drugs in liver cells.

Nucleus controls and coordinates various activities of a cell.

Mitochondrion is called the 'Powerhouse of a cell' because it synthesises energy in the form of ATP in a living cell.

Plastids are responsible for trapping solar energy so as to synthesise carbohydrates in the photosynthetic plants.

Infoldings called cristae present in the inner membrane provide large surface area for ATP generation.

The thread-like structures present in the nucleus are called chromatin fibres.

Nucleolus dictates ribosomes to synthesise proteins. It is located in the nucleus of the cell.

Lysosomes form a waste disposal system of cell by digesting foreign material and worn-out organelles.

Bacteria contain an undefined nuclear region containing only nucleic acids, called nucleoid. The organisms that lack a well-developed nuclear region are called prokaryotes.

Nucleolus helps in the synthesis of protein by forming and storing RNA.

The ability of a cell to divide helps in repair of an injury. Mitosis is a process in which a cell divides to form new cells at the site of injury.

Nucleus is the most vital organelle for the survival of cell. It controls and coordinates various activities of a cell.

When cell is old or injured, lysosomes rapidly destroy organelles. In case, its own cell is ruptured, it bursts out releasing its hydrolytic enzymes in the cells, thereby digesting the damaged cell. Therefore, it is called as the sucidial bag of the cell.

Nucleolus is a round-shaped body present inside the nucleus. It helps to produce ribosomes, DNA and RNA. Hereditary characters of a person are controlled by genes.

Cell wall gives rigidity and shape to the plant cell. Endoplasmic reticulum helps in the synthesis and transport of proteins and fats.

Organisms like bacteria that lack a well-defined nuclear region are called prokaryotes.

Vacuoles store various materials like starch, amino acids, water, nitrogenous waste, etc.

Vacuoles are covered by tonoplast and they store water, food material and waste products in a cell.

Golgi apparatus is composed of stacks of membrane-bound structures known as cisternae. It helps in the storage, packaging and transport of materials synthesised in the endopolasmic reticulum. It also forms the acrosome of a sperm.

Endoplasmic reticulum serves as a channel for transport of materials between various regions of cytoplasm.