rna molecule pairs with three nucleotides on a mrna molecule.

(UAA or UAG or UGA) and a poly-A tail of many adenine-containing nucleotides at 3 end. A small non-coding region may be present after the head and before tail. In eukaryotes, mRNA carries information for one polypeptide only. It is monocistronic (monogenic) because it ..

Nucleotides are nitrogen containing organic compounds, which form the monomers of nucleic acids that are involved in the information transfer system of the cells. They are also involved in the mechanism of energy transfer in cells. A nucleotide is a compound containing carbon, h..

In a molecule having three bond pairs of electrons around its central atom, the electron pairs form an equilateral triangular arrangement around the central atom. These molecules have trigonal planar (or triangularplanar) shape and the three bond pairsh..

The three different types of RNA, namely, messenger RNA (mRNA), ribosomal RNA (rRNA) and transfer RNA (tRNA) are transcribed from different regions of the DNA molecule. Three different RNA polymerases: I..

A molecule having three bond pairs, and one lone pair of electrons, has these four pairs of electrons distributed tetrahedrally around the central atom. A molecule of AB 3 type has a triangular pyramidal shape and is called a trigonal py..

An example of sharing of one pair of electrons (single bond). Two atoms of hydrogen share one pair of electrons to form a molecule of hydrogen (Fig. 3.4). ..

An example of sharing of one pair of electrons (Single bond) Two atoms of chlorine share one pair of electrons to form one molecule of chlorine (Fig. 3.7). Note : ..

Six bond pairs in a molecule are distributed octahedrally around the central atom. A molecule having six bond pairs around its central atom has an octahedral shape. In a molecule of the type AB 6 , the six 'B' atoms are placed octahedrally around '..

Molecule having four bond pairs of electrons around the central atom, arrange their electrons tetrahedrally. These molecules have tetrahedral shapes and the four bond pairs are at an angle of 10928' with respect to each other. Some molecules which ..

An oxygen atom has six electrons in its valence shell. As a result, it requires 2 more electrons to achieve the nearest noble gas configuration. When two oxygen atoms share two pairs of electrons this is achieved: ..