What is a loosely bound electron?
Thus, “loosely bound” might mean that the electron binding energy (vertical detachment energy) is small, but might also mean that there is an electron that it is only loosely associated with any particular molecular unit, even in cases where the electron binding energy is sizable.
What are the classification of nucleic acids?
Nucleic acids are divided into two classes: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
What are nucleic acids Shaalaa?
Nucleic acids are biomolecules found in the nuclei of all living cells, as one of the constituents of chromosomes. There are mainly two types of nucleic acids − deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleic acids are also known as polynucleotides as they are long-chain polymers of nucleotides.
What are electrons called that are not held tightly by the nucleus?
The electrons in orbitals closest to the nucleus are held most tightly; those in the outermost orbitals are shielded by intervening electrons and are the most loosely held by the nucleus.
Is electron is bound with nucleus?
An electron is a negatively charged subatomic particle. It can be either free, or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels. The larger the spherical shell, the higher the energy contained in the electron.
What are the 3 parts to a nucleotide?
A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T).
What are the 5 levels of DNA structure?
Chemically speaking, DNA and RNA are very similar. Nucleic acid structure is often divided into four different levels: primary, secondary, tertiary, and quaternary.
What is nucleoside and nucleotide Shaalaa?
A nucleoside is formed by the attachment of purine or pyrimidine base to the 1-position of a pentose sugar. On the other hand, a nucleotide is a unit formed by the attachment of nucleoside to phosphoric acid at the 5′-position of the sugar moiety.
What do you call the attraction between the nucleus and the electron?
Table of contents No headers. Chemical bond refers to the forces holding atoms together to form molecules and solids. This force is of an electric nature, and the attraction between electrons of one atom to the nucleus of another atom contributes to what is known as chemical bonds.
Which of the following electrons is most tightly bound by the nucleus?
Among the given set of orbitals 4p orbital is the nearest to the nucleus. Since ‘p’ orbital is more penetrating than ‘d’ orbital, it is more tightly bound by the nucleus.
What is it called when an electron is close to the nucleus?
The electrons revolving close to the nucleus of an atom are called bound electrons.
What binds electrons to the nucleus?
The electromagnetic force binds negative electrons to the positive nuclei in atoms and underlies the interactions between atoms.
How many sides are there in deoxyribose?
In DNA, deoxyribose exists as a five-membered ring.
What are the 6 structures of DNA?
(The Double Helix) DNA is made up of six smaller molecules — a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).
What is 5 and 3 in DNA structure?
Each end of DNA molecule has a number. One end is referred to as 5′ (five prime) and the other end is referred to as 3′ (three prime). The 5′ and 3′ designations refer to the number of carbon atom in a deoxyribose sugar molecule to which a phosphate group bonds.
What is deoxyribose in biology?
Deoxyribose Definition. Deoxyribose is the five-carbon sugar molecule that helps form the phosphate backbone of DNA molecules. DNA, or deoxyribonucleic acid is a polymer formed of many nucleic acids. Each nucleic acid is composed of a deoxyribose molecule bound to both a phosphate group and either a purine or a pyrimidine.
What is the correct formula for Deoxyribose?
Deoxyribose, or more precisely 2-deoxyribose, is a monosaccharide with idealized formula H−(C=O)−(CH 2)−(CHOH) 3−H. Its name indicates that it is a deoxy sugar, meaning that it is derived from the sugar ribose by loss of an oxygen atom.
Does deoxyribose have OH at C2’carbon?
Thus, the deoxyribose is said to lack an OH at the C2 ‘carbon. Figure 2: Fisher’s projection of deoxyribose. All carbohydrates are cyclized in aqueous medium since this gives stability. Depending on their carbon number, they may adopt a structure analogous to furan or pyran as shown in figure 3 (MURRAY, BENDER, & BOTHAM, 2013).
What are 2-deoxyribose derivatives?
As a component of DNA, 2-deoxyribose derivatives have an important role in biology. The DNA (deoxyribonucleic acid) molecule, which is the main repository of genetic information in life, consists of a long chain of deoxyribose-containing units called nucleotides, linked via phosphate groups.