Chromosomes are composed of deoxyribonucleic acid (DNA) mole
There are mainly two molecules that function as genetic material in living organisms.
These are ribonucleic acid(RNA) and deoxyribonucleic acid(DNA).
The organisms having DNA as genetic material require packaging of DNA as it is a long polymer of deoxyribonucleotides.
In the case of human beings, the length of DNA in a cell is approximately 2.2 meters which is very large as compared to the size of the nucleus( approximately 10^-6 meters).
So, the DNA has to be made compact for it to be present inside the nucleus of a cell.
Therefore, the DNA present inside the nucleus of a cell undergoes coiling and compaction through several stages before finally becoming a chromosome, which is shown in the adjoining diagram.
Thus, chromosomes are composed of deoxyribonucleic acid (DNA) molecules.
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The clinical manifestation which supports this conclusion is that an injury to the brachial plexus which happens during birth. Erb is termed as a paralysis of the arm which is caused by an injury on upper arm's main nerves to be specifically the C5-C6 nerves.
It arrives most commonly on shoulder dystocia when there is a difficult birth. This paralysis can resolve on its own depending on nature of the damage.
In a human? Need more context here but should be outside the cell. At equilibrium you will have a more negative environment in the cell.
ANSWER:
Synonyms for light:
flash, glimmer, glint, glitter, scintillation, shimmer, sparkle, twinkle
daylight, moonlight, sunlight, sunshine
afterglow, aureole (or aureola), aurora, beam, halo, ray, shaft, streak, stream, sunbeam
glisten, gloss, luster (or lustre), polish, reflection, sheen
Antonyms for light:
blackness, dark, darkness, dimness, dusk, duskiness, gloom, night, shadow
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