What is DNA?

Answer 1

A nucleic acid

apex

Answer 2

DNA hybridisation is where DNA is compared from different species to determine how closely species are related

Answer 3

Deoxyribonucleic Acid DNA is a nucleic acid polymer consisting of two long backbones, with nitrogenous bases connecting them (imagine a ladder). This structure is then twisted into a double helix.

The two back bones are composed of a pentose sugar (namely deoxyribose) with the nitrogenous bases facing inwards and connected to each other via hydrogen bonding. The sugars are in turn connected together by phosphate groups with phosphodiester bonds.

The function of DNA is long-term information storage. A brief synopsis is that DNA is used as a template to make mRNA (transcription) which directs the assembly of a protein in a ribosome (translation).

DNA must be replicated during cell reproduction, as each daughter cell resulting in mitosis will require a full genome. DNA replication is a nearly exact process, with error rates less than one-in-a-billion. This is due to the nitrogenous bases, which is where the information is stored. Four bases exist in DNA: adenine, guanine, cytosine and thymine (A,T,C and G). Remember the two legs of a ladder running anti-parallel to each other, with bases facing inwards. Each base is connected to the one across from it via relatively weak hydrogen bonding. This bonding however, allows the DNA to be replicated with remarkable exactness as A can only bond with T and C can only bond with G. As such, when DNA Polymerase enzymes polymerize a new strand of DNA, they "know" which order to put the bases in, thus conserving information. This is known as the "semi-conservative" model of DNA Replication.

Definition:

The official definition of the word DNA is "deoxyribonucleic acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information."

Answer 4

Is a molecule composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses.

Hope it helps ^^

Answer 5

DNA stands for deoxyribonucleic acid, which is a molecule that carries the genetic instructions for the development, functioning, growth, and reproduction of all living organisms. It is made up of a sequence of nucleotides that encode the information necessary for an organism's traits and characteristics. DNA is located in the nucleus of cells and plays a crucial role in determining an organism's genetic makeup.

Answer 6

DNA stands for Deoxyribonucleic acid. DNA are molecules that carry genetic information in living organisms to include humans and animals.

Answer 7

Dna Is genetic/traits passed down from one person to another for

eg. Brown hair-Dna , Blue Eyes-Dna, Red skin-Dna.