What are the organelles of the cell and their functions?

What are the organelles of the cell and their functions?

What’s found inside a cell

Organelle Function
Nucleus DNA Storage
Mitochondrion Energy production
Smooth Endoplasmic Reticulum (SER) Lipid production; Detoxification
Rough Endoplasmic Reticulum (RER) Protein production; in particular for export out of the cell

What is the best way to describe a cell organelle?

An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body. Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins.

What is the cell wall organelle function?

The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.

What are 12 cell organelles and their functions?

Terms in this set (12)

  • cytosketeton. helps position and transport organelles; provides strength; aids in movement.
  • nucleus. stores genetic information.
  • endoplasmic reticulum. produces proteins and lipids; breaks down drugs and alchohol.
  • ribosomes. link amino acids to form proteins.
  • golgi apparatus.
  • vesicles.
  • mitochondria.
  • vacuole.

What are 10 organelles and their function?

Major eukaryotic organelles

Organelle Main function Notes
Golgi apparatus sorting and modification of proteins
mitochondrion energy production has some DNA; originated by endosymbiosis
nucleus DNA maintenance, RNA transcription has bulk of genome
vacuole storage, homeostasis

What are the main function of endoplasmic reticulum?

The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.

What are the two main functions of endoplasmic reticulum?

Endoplasmic reticulum (ER), in biology, a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells and serves multiple functions, being important particularly in the synthesis, folding, modification, and transport of proteins .

What are the three functions of smooth endoplasmic reticulum?

Its main functions are the synthesis of lipids, steroid hormones, the detoxification of harmful metabolic byproducts and the storage and metabolism of calcium ions within the cell. The smooth ER is distinguished from the other parts of the endoplasmic reticulum by the absence of membrane-bound ribosomes.

What is the main function of ribosomes Class 9?

The important ribosome function includes: It assembles amino acid to form proteins that are essential to carry out cellular functions. The DNA produces mRNA by the process of DNA transcription. The mRNA is synthesized in the nucleus and transported to the cytoplasm for the process of protein synthesis.

What is the function of Golgi apparatus Class 9?

CBSE NCERT Notes Class 9 Biology Fundamental Unit of Life. The stacks of flattened membranous vesicles are called Golgi apparatus. It basically stores, packs and modifies the products in vesicles. It temporarily stores protein that moves out of the cell through the vesicles of the Golgi apparatus.

What are ribosomes Class 9?

Ribosomes are the cell organelles found inside the cell and composed of RNA and Proteins. They may found suspended in the cytosol, called free ribosomes or bound to the endoplasmic reticulum, called bound ribosomes. They help in protein synthesis.

What is the function of mitochondria Class 9?

1)They are sites of cellular respiration. 2)They uses oxygen to oxidise carbohydrates and fats present in the cell to carbon dioxide and water. Oxidation releases energy,a portion of which is used to form ATP. Since mitochondria synthesises energy rich compound ATP it is called powerhouse of cell.

What are the 4 parts of the mitochondria?


  • the outer mitochondrial membrane,
  • the intermembrane space (the space between the outer and inner membranes),
  • the inner mitochondrial membrane,
  • the cristae space (formed by infoldings of the inner membrane), and.
  • the matrix (space within the inner membrane).

What is Plasmolysis Class 9?

Plasmolysis is defined as the process of contraction or shrinkage of the protoplasm of a plant cell and is caused due to the loss of water in the cell. Plasmolysis is an example of the results of osmosis and rarely occurs in nature.

What is cell division Class 9?

Cell division happens when a parent cell divides into two or more cells called daughter cells. Cell division usually occurs as part of a larger cell cycle. In other words, such cycles of growth and division allow a single cell to form a structure consisting of millions of cells.

What is the importance of cell division Class 9?

Cell division serves as a means of reproduction in unicellular organisms through binary fission. In multicellular organisms, cell division aids in the formation of gametes, which are cells that combine with others to form sexually produced offspring.

What are the two main types of cell division?

There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells.

What is cell division in short?

Cell division is the process by which a parent cell divides into two or more daughter cells. Cell division usually occurs as part of a larger cell cycle. Meiosis results in four haploid daughter cells by undergoing one round of DNA replication followed by two divisions.

What are 3 types of cell division?

There are three main types of cell division: binary fission, mitosis, and meiosis. Binary fission is used by simple organisms like bacteria. More complex organisms gain new cells by either mitosis or meiosis. Mitosis is used when a cell needs to be replicated into exact copies of itself.

What is an example of cell division?

For example, when you skin your knee, cells divide to replace old, dead, or damaged cells. Cells also divide so living things can grow. When organisms grow, it isn’t because cells are getting larger. Organisms grow because cells are dividing to produce more and more cells.

What controls the rate of cell division?

A variety of genes are involved in the control of cell growth and division. Tight regulation of this process ensures that a dividing cell’s DNA is copied properly, any errors in the DNA are repaired, and each daughter cell receives a full set of chromosomes. …

What are the factors that affect cell division?

Factors Affecting Cell Division

  • Nutrients. The nutrients present in the cell affect cell division.
  • Genetics. Genetic code regulates cell division.
  • Chemicals. Exposure to toxic chemicals such as pesticides and some cleaning chemicals can cause cell mutation.
  • Stress. Stress affects cell division.

What are the factors that initiate cell division?

Key Points

  • The death of nearby cells and the presence or absence of certain hormones can impact the cell cycle.
  • The release of growth-promoting hormones, such as HGH, can initiate cell division, and a lack of these hormones can inhibit cell division.

What controls what enters and leaves the cell?

cell membrane

What controls the activities of the cell?


Which type of cell has no nucleus?