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:
a. Continuous reinforcement schedule (CRF)
Explanation:
Under DRA(differential reinforcement alternative), behaviour that is an accepted alternative to problem behaviour is accepted and reinforced. This reinforcement frequency correctly falls under continuous reinforcement schedule(CRF) where behaviour is reinforced everytime there is a correct response. For example, if you were teaching a child to pronounce certain words correctly, you would reward the child everytime he got a pronunciation correct.
Answer: Dissociative fugue.
Explanation:
Dissociative fugue is an uncommon type of dissociative amnesia that makes people forget their identity or significant autobiographical information. Usually includes some kind of unforeseen travel.
Dissociative fugue can last from a few hours and up to several months, if not longer, in which case the affected may wander away from home, create a new personality, and start a new life, unaware of the situation.
Answer:
B. False Assumption
Explanation:
False Assumption: this is a term that describes the type of barriers to effective listening. This type of barrier occurs, when the information or message receiver assumed that the communication is the sole responsibility of the sender or the speaker, while receiver has no role to play.
In other words, it is the assumption that the receiver does not required to be active in listening, giving feedback or ask questions relating to point of discuss.
Other types of Listening barriers includes but not limited to the following:
1. Physiological barriers: this relates to mind, or absence of mind to the information being passed.
2. Physical barriers: e.g environment noise
3. Attitudinal barrier: such as work related or egocentrism
4. Lack of training
5. Gender barriers
