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.
The word banana appears on the left screen, and the split-brain patient is told to use her right hand to select the object named on the screen. she will be able to fetch the banana yes this statement is true.
A patient is anyone who receives medical services provided by a healthcare professional. Patients are most often sick or injured and require treatment by a doctor, nurse, optometrist, dentist, veterinarian, or other health care provider. The patient's definition is to wait quietly as long as necessary. Example of a patient waiting 2 hours for a veterinary visit without protest. Adjective. 2. A patient is defined as a person receiving medical care. Patient care refers to the prevention, treatment, and management of disease and the maintenance of physical and mental health through services provided by medical professionals.
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3.666666 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.<span>
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Answer: Nitrogen oxides are present in combustion and industrial processes.
Explanation: We are talking about the combustion of coal, oil and gasoline by the emission of vehicles such as ships, airplanes trucks and automobiles, which is specially significant in big cities where there is more traffic . For the industry part there are the electric power plants and large industrial operation plants.
When the ball is on the verge of hitting the earth, the maximum force of gravity will be exerted on it.
As the ball approaches the earth, its speed gradually increases until it reaches its maximum level just before it hits the ground, the gravitational pull is greatest at this instant.
<h3>What does gravity mean in simple terms?</h3>
When Albert Einstein published his theory of general relativity in 1915, he figured out the answer.
Gravity pushes you toward the ground because all mass objects, such as our Earth, bend and distort the fabric of the cosmos, known as spacetime.
Gravity is the sensation of curvature. In mechanics, gravity, often known as gravitation, is the universal force of attraction that operates on all matter.
It is the weakest known force in nature, and so has no bearing on the interior properties of ordinary matter.
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