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:
b) subjects agree to participate in a study after receiving complete information about the nature and purpose of the study.
Explanation:
In research, the term informed consent refers to the process in which researchers get a voluntary agreement from participants of the study where they state they are willing to participate on it.
This consent involves informing the subjects about their rights, the procedures they will undergone to, the purpose of the study and the risks and benefits they might have. However, in this consent the researchers <u>do not disclose the hypothesis of the study because this might put in risk the results of the study </u>(since participants might change their behavior due to this).
Therefore, the correct answer is that informed consent means that b) subjects agree to participate in a study after receiving complete information about the nature and purpose of the study.
California Trail.
hoped it helped
Your Welcome
According to developmentalist william perry, as compared to adolescence, thinking in adulthood is <u>the use of intellect to become less dualistic and absolutistic and more reflective.</u>
<h3>What is adulthood?</h3>
An individual that has attained sexual maturity is referred to as an adult biologically. The term "adult" includes implications connected to social and legal concerns in a human environment.
Adulthood is the stage of life when a person has fully developed physically and intellectually. Adulthood is typically assumed to start at 20 or 21 years old.
Therefore, according to developmentalist william perry, as compared to adolescence, thinking in adulthood is the use of intellect to become less dualistic and absolutistic and more reflective
Learn more about adult on:
brainly.com/question/1595474
#SPJ1
