Ribosome, particle that is present in large numbers in all living cells and serves as the site of protein synthesis . Ribosomes occur both as free particles in prokaryotic and eukaryotic cells and as particles attached to the membranes of the endoplasmic reticulum in eukaryotic cells.
What is a ribosome simple definition?
: any of the RNA-rich cytoplasmic granules that are sites of protein synthesis — see cell illustration.
What are the four functions of ribosomes?
It is the small particles of RNA and proteins founds throughout the cytoplasm , that are involved in protein synthesis. ¤ they carry out protein synthesis. ¤ they makes the cells protein. ¤ they are responsible for translating code from RNA .
Which best describes the function of a ribosome?
which best describes the function of a ribosome? Ribosomes use RNA to synthesize proteins . ... A chemical is added to cells, stopping all the activity of ribosomes.
What is function of ribosome?
A ribosome functions as a micro-machine for making proteins . Ribosomes are composed of special proteins and nucleic acids. The TRANSLATION of information and the Linking of AMINO ACIDS are at the heart of the protein production process.
What is the main function of the Golgi apparatus *?
The Golgi apparatus, or Golgi complex, functions as a factory in which proteins received from the ER are further processed and sorted for transport to their eventual destinations: lysosomes, the plasma membrane, or secretion. In addition, as noted earlier, glycolipids and sphingomyelin are synthesized within the Golgi.
What is a Golgi apparatus easy definition?
(GOL-jee A-puh-RA-tus) A stack of small flat sacs formed by membranes inside the cell’s cytoplasm (gel-like fluid). The Golgi apparatus prepares proteins and lipid (fat) molecules for use in other places inside and outside the cell . The Golgi apparatus is a cell organelle. Also called Golgi body and Golgi complex.
What is the description of ribosomes?
The ribosome is a complex molecule made of ribosomal RNA molecules and proteins that form a factory for protein synthesis in cells . ... The ribosome is responsible for translating encoded messages from messenger RNA molecules to synthesize proteins from amino acids.
How do you describe ribosomes?
A ribosome is a cellular particle made of RNA and protein that serves as the site for protein synthesis in the cell. The ribosome reads the sequence of the messenger RNA (mRNA) and, using the genetic code, translates the sequence of RNA bases into a sequence of amino acids.
What are the two different types of ribosomes?
There are two types of ribosomes, free and fixed (also known as membrane bound) . They are identical in structure but differ in locations within the cell. Free ribosomes are located in the cytosol and are able to move throughout the cell, whereas fixed ribosomes are attached to the rER.
How ribosomes are formed?
Eukaryote ribosomes are produced and assembled in the nucleolus . Ribosomal proteins enter the nucleolus and combine with the four rRNA strands to create the two ribosomal subunits (one small and one large) that will make up the completed ribosome (see Figure 1).
What is the function of ribosomes What are the two components?
What are their two components? Ribosomes- complexes made of ribosmal RNA abd protein, are the cellular components and carry out protein synthesis . The two components are Ribosmal RNA and proteins.
What is the purpose of a translation?
Translation is the process of translating the sequence of a messenger RNA (mRNA) molecule to a sequence of amino acids during protein synthesis . The genetic code describes the relationship between the sequence of base pairs in a gene and the corresponding amino acid sequence that it encodes.
What is the structure and function of Golgi body?
The Golgi apparatus is a central intracellular membrane-bound organelle with key functions in trafficking, processing, and sorting of newly synthesized membrane and secretory proteins and lipids . To best perform these functions, Golgi membranes form a unique stacked structure.
What are the two functions of Golgi apparatus?
The vital function of the Golgi apparatus is packaging and secretion of proteins . It receives proteins from Endoplasmic Reticulum. It packages it into membrane-bound vesicles, which are then transported to various destinations, such as lysosomes, plasma membrane or secretion.
What is Golgi apparatus Class 9?
Golgi apparatus. Golgi apparatus. 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.
