Essay On Dna Structure

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Nucleotides simply refer to nitrogenous bases, pentose sugar together with the phosphate backbone.

Nucleotides are adjacently strung together through a phosphate backbone and are held together with their complements through hydrogen bonds.

It is her work together with that of the above-mentioned Nobel Laureates that gave us the gold mine (DNA) that has led to advances in all fields of biology; most notably, medicine.

This part of the DNA story is a lot more complex than this, but we will end here for the purpose of this lesson. Nucleic acids are the building blocks of all living organisms.

DNA is double-stranded while RNA is single-stranded.

Last but not least, DNA is found in the nucleus while RNA resides both in the nucleus and the cytoplasm. Consider this; each and every one of your cells contains approximately 6 billion base pairs of DNA, with each base pair being 0.34 nanometers long.Both DNA and RNA have a negative backbone (because of the phosphate group).They both have four nucleotides each, three of which they share (Guanine, Cytosine, and Adenine); with one significant difference, DNA has Thymine while RNA has Uracil.Use these model essay question responses to prepare for essay questions on your in class tests, as well as the IB Examination, Paper 2.These questions have appeared on recent IB examinations, exactly as shown below.Simply put, they are connected by the central dogma.The central dogma is the process of DNA transcription and translation for the purpose of protein synthesis which then perform a multitude of tasks in organisms.Following each question is the markscheme answer which was used to evaluate student answers on the examination paper.Simply put, DNA (Deoxyribonucleic Acid) is a string of nitrogenous bases (Adenine, Thymine, Guanine, and Cytosine) repeated over and over, and arranged in a seemingly random fashion. These bases are connected to each other through chemical bonds.DNA is long-lived while RNA is regenerated with each reaction. This works out to about 2 meters of DNA per diploid cell!If the DNA sequence is so long how does the nucleus manage to house the DNA and many other components necessary for the functioning of the cell?

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