DNA

Deoxyribonucleic acid (ⁱ/diˈɒksiˌraɪboʊnjʊˌkliːɪk, -ˌkleɪɪk/;DNA) is a molecule that carries most of the genetic instructions used in the development, functioning and reproduction of all known living organisms and many viruses. DNA is a nucleic acid; alongside proteins and carbohydrates, nucleic acids compose the three major macromolecules essential for all known forms of life. Most DNA molecules consist of two biopolymer strands coiled around each other to form a double helix. The two DNA strands are known as polynucleotides since they are composed of simpler units called nucleotides. Each nucleotide is composed of a nitrogen-containing nucleobase—either cytosine (C), guanine (G), adenine (A), or thymine (T)—as well as a monosaccharide sugar called deoxyribose and a phosphate group. The nucleotides are joined to one another in a chain by covalent bonds between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar-phosphate backbone. According to base pairing rules (A with T, and C with G), hydrogen bonds bind the nitrogenous bases of the two separate polynucleotide strands to make double-stranded DNA. The total amount of related DNA base pairs on Earth is estimated at 5.0 x 10³⁷, and weighs 50 billion tonnes. In comparison, the total mass of the biosphere has been estimated to be as much as 4 TtC (trillion tons of carbon).

Bangladeshi rock

Bangladeshi rock or Bangla rock (Bengali: বাংলা রক) is the rock music of Bangladesh. It originated in Chittagong with Souls, which was formed in 1970.Distortion, electric and bass guitars and drums are used, sometimes accompanied by piano or other keyboard instruments. In the past, it was accompanied by saxophone, flute, violin and bass violin.

History

Origin (1960s–1970s)

Bangladeshi rock began in 1960 when a handful of self-taught musicians joined to create original songs. Their efforts resulted in the birth of the Bangla rock scene. In 1963, Zinga Goshty was the first orchestra band in Bangladesh, formed in Chittagong by a group of students from Chittagong College. Pioneering groups during the late 1960s included Windy Side of Care (M. Fazle Rub, Alamgir, Rafique Mazhar Islam Saju, Rafi Omar, and Khwaja Shabbir Quader), the Lightnings (Neo Mendis,Noel Mendis) Rambling Stones (Zafar Iqbal and others), Ugly Phases, Time Ago Motion (Robin and others), Fire in Ice (Selim Alam, Reza Ahmed, Chhoton Islam and Habib Zafarullah Mithu) and Insex Dui (a band with American students studying at the American School in Dacca). They performed without expensive instruments or sound systems.