Get What Is The Structure Of Dna? - Amherst

The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladder's rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder. DNA is a double helix ( Watson and Crick Model) formed by base pairs attached to a sugar-phosphate backbone.

Based on the number of strands, DNA is of two types, viz., double-stranded DNA and single- stranded DNA as discussed below: Double-stranded DNA: The DNA which has spirally arranged double strands is known as double-stranded DNA. In most of the organisms including plants, animals and bacteria, DNA is double-stranded.

DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.

Structure of DNA It is made of three component parts; a sugar, phosphate groups, and nitrogen bases. The sugar that makes up the backbone of the DNA molecule is called deoxyribose. It is a 5-carbon sugar that is interspersed with the phosphate groups, forming a repeating pattern.

In Watson and Crick's model, the two strands of the DNA double helix are held together by hydrogen bonds between nitrogenous bases on opposite strands. Each pair of bases lies flat, forming a "rung" on the ladder of the DNA molecule. Base pairs aren't made up of just any combination of bases.

Within eukaryotic cells, DNA is organized into long structures called chromosomes. Before typical cell division, these chromosomes are duplicated in the process of DNA replication, providing a complete set of chromosomes for each daughter cell.

Nucleotides are arranged in two long strands that form a spiral called a double helix. The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladder's rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder.

Based on the number of strands, DNA is of two types, viz., double-stranded DNA and single- stranded DNA as discussed below: Double-stranded DNA: The DNA which has spirally arranged double strands is known as double-stranded DNA. In most of the organisms including plants, animals and bacteria, DNA is double-stranded.

DNA is made of two linked strands that wind around each other to resemble a twisted ladder — a shape known as a double helix. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.

Each molecule of DNA is a double helix formed from two complementary strands of nucleotides held together by hydrogen bonds between G-C and A-T base pairs. Duplication of the genetic information occurs by the use of one DNA strand as a template for formation of a complementary strand.