The first description of the DNA (deoxyribonucleic acid)chain was done by Watson and Crick in 1953, the nucleotides that constitute the DNA are four: cytosine (C), guanine (G), timine (T) and adenine (A). When doing a model is essential to remember that cytosine ONLY joins guanine and timine only link adenine, this is due to the size and chemical properties of each molecule. Later, another related and similar and molecule was discovered, the ribonucleic acid or RNA, which also is constructed by nucleotides.
In both cases, the nucleotides are compound of 3 main components: a nitrogen base, a pentose and a phosphate. When the molecule lacks the phosphate group, is called nucleoside. Depending on the chain ( DNA or RNA) the nitrogen base derives from purine (adenine and guanine) or pyrimidine (cytosine or timine) just in the RNA instead of timine is uracil (U)
The union is established between adjacent molecules through the phosphate, while among each other through the nitrogen base-remember C=G and T or U=A. The core of each molecule is the pentose. Therefore the best representation of the molecule is attached
References
Watson, J. D., & Crick, F. H. (1953, January). The structure of DNA. In Cold Spring Harbor symposia on quantitative biology (Vol. 18, pp. 123-131). Cold Spring Harbor Laboratory Press.
Answer: Desire to escape stress by avoiding stressful situations
Explanation: Hardiness, according to scientists, is the ability of an individual to cope with stress effectively, while achieving some resistance to stress, that is, hardiness. Stressors are present everywhere in everyday modern life, and sometimes such stressors can accumulate so much stress in the individual that it can happen that the individual is pushed beyond the limit of endurance, that is, to succumb to stress, not knowing how to cope with it. For those who are susceptible to stress, not knowing how to deal with it, there is a tendency to avoid stressful situations in order to simply avoid stress.
In contrast, there are those who deal with stressors and, in doing so, successfully overcome stress, they develop themselves, become stronger, resistant to stress. Here, again, according to scientists, it is necessary to develop a strategy for dealing with stress, then to have a firm attitude and the belief that someone can cope with stress, it seems that in fact, such people can successfully cope with stress. This kind of stress resistance, i.e hardiness, can only be achieved by those who deal with stress, and therefore do not avoid it.
Answer:
Explanation:
divide the number by his base height, and make sure that you solve it as a negative. not completely sure sorry.
