The gel like fluid that fills most of the cells would be cytoplasm also called protoplasm. Cytoplasm is enclosed by the cell membrane present within the cell, except for cell nucleus.

​Cytoplasm Cytoplasm is the gelatinous liquid that fills the inside of a cell. It is composed of water, salts, and various organic molecules.

Cytoplasm is the Jelly -like substance present in the cell. It occupies the space between the cell membrane and the nucleus. It has several different structures called cell organelles which perform the various functions.

The main components of the cytoplasm are cytosol (a gel-like substance), the organelles (the cell’s internal sub-structures), and various cytoplasmic inclusions. The cytoplasm is about 80% water and usually colorless.

Eukaryotic cells have an internal cytoskeletal scaffolding, giving them their distinctive shapes. The cytoskeleton enables cells to transport vesicles, undergo changes in shape, migrate and contract. Exposure of the cells to oxytocin provoked a 10% shortening of actin stress fibres.

A ribosome itself looks like a little hamburger bun. It’s made of two subunits: a big one (the top bun) and a small one (the bottom bun). Eukaryotic ribosomes are found floating freely in the cytoplasm or attached to the rough endoplasmic reticulum (RER or rough ER for short).

A ribosomes is a small organelle involved in the process of making protein, which is called protein synthesis. The ribosome handles translation, which is the second part of protein synthesis. Ribosomes can be found floating freely in the cytoplasm or attached to rough endoplasmic reticulum.

Ribosome Structure and Composition. Ribosomes are composed of ribosomal RNA (rRNA) and protein. The 30S subunit contains 16S rRNA and 21 proteins; the 50S subunit contains 5S and 23S rRNA and 31 proteins. The two subunits combine during protein synthesis to form a complete 70S ribosome about 25nm in diameter.

By Sally Robertson, B.Sc. A ribozyme is a ribonucleic acid (RNA) enzyme that catalyzes a chemical reaction. The ribozyme catalyses specific reactions in a similar way to that of protein enzymes. Also called catalytic RNA, ribozymes are found in the ribosome where they join amino acids together to form protein chains.

Messenger RNA (mRNA) is translated into protein by the joint action of transfer RNA (tRNA) and the ribosome, which is composed of numerous proteins and two major ribosomal RNA (rRNA) molecules. Transfer RNA (tRNA) is the key to deciphering the code words in mRNA.

The most common activities of natural or in vitro-evolved ribozymes are the cleavage or ligation of RNA and DNA and peptide bond formation. Within the ribosome, ribozymes function as part of the large subunit ribosomal RNA to link amino acids during protein synthesis.

The ribosome is a ribozyme, admittedly one dependent on structural support from protein components—substantially deproteinized large subunits still carry out peptidyl transfer, although complete deproteinization destroys this reactivity (8).

Catalytic RNA molecules are called ribozymes. Most classes of RNA, including transfer RNA (tRNA), ribosomal RNA (rRNA), and messenger RNA (mRNA) are transcribed as precursors that are larger than the final product.