1. The structural unit of nucleic acids are composed of repeating units of monomers called nucleotides. Nucelotides are composed of three functional groups: sugars which are specifically pentoses (5-Carbon sugars), phosphate group and nitrogenous base.
2. The two major classes of nucleic acids in the body are the DNA or deoxyribonucleic acids and RNA or ribonucleic acids.
3.
a. Based on the nitrogenous bases and sugar, the DNA has a deoxyribose as the sugar and its 4 bases are adenine, guanine, cytosine and thymine. For RNA, the sugar is ribose while its 4 bases are <span>adenine, guanine, cytosine, and uracil
b. Based on the </span>general three-dimensional structure, DNA is a double stranded β-helix with a long chain of nucleotides. RNA is composed of a shorter chain with a single strand α-helix structure.
c. Based on r<span>elative functions, the DNA is responsible for storing the genetic information while the RNA is responsible for transporting the genetic information to the ribosomes which synthesize proteins.</span>
<h3>
Answer:</h3>
3.31 × 10^23 molecules
<h3>
Explanation:</h3>
We are given;
The number of moles = 0.55 moles
We are required to calculate the number of molecules in 0.55 moles of sodium nitrate.
We know that 1 mole of a compound contains molecules equivalent to the Avogadro's number, 6.022 × 10^23.
Therefore;
1 mole of NaNO₃ = 6.022 × 10^23 molecules
Thus, for 0.55 moles will contain;
= 0.55 moles × 6.022 × 10^23 molecules
= 3.31 × 10^23 molecules
Hence, 0.55 moles will contain 3.31 × 10^23 molecules
Answer: it would have to be removed.
Explanation:
If you had no digestive system, you would have no ability to get the nutrients and sugars in food, and you would die. The digestive system is very long, however. Some people have gotten into car accidents and damaged their intestines, and had to have part of them removed
Positive ions are positive because they have lost electrons.
(A)-This sounds accurate, but is actually not true. When an atom loses an electron and forms a positive ion, there will be less negative charge from the electrons to attract the positively charged nucleus. Losing electrons will actually decrease the attraction between the electrons and the nucleus.
(B)-This is true in some cases, but not all. If, for example, sodium were to lose an electron, it would drop down to having its largest orbital being in the second energy level, and would decrease in size. If magnesium were to lose an electron, it would still have one electron in the third energy level, so it wouldn't drop down an energy level.
(C) and (D)-Not sure where these answers even came from.
The actual reason behind the radius of a positive ion being smaller than the radius of its neutral atom is that the repulsive force between the electrons themselves is decreased, causing them to move closer together.
<h2>Answer:</h2>
The correct answer is option A which is hybridization occurs in plants more often than in animals.
<h3>Explanation:</h3>
- Hybridization means mixing of different things.
- In the context of biology, hybridization means the mixing of genetic material of the two dissimilar species. The resulting offspring is known as the hybrid.
- In the case of animals, they are usually infertile as a mule, a hybrid of donkey and horse.
- Hybridization always involves interspecies mating. And sometimes the natural selection is in favor of hybridization.
- In plants, it is very common which is also known as crossbreeding and different types of plants and fruits are produced by this method.
- Hence the correct option is A.
