Answer:
A. DNA
(out of all the options, the DNA molecules must never leave the nucleus)
Correct option:
<h2>What is D.N.A.?</h2>
Discoverer: Friedrich Miescher
Date of Invention: 1869
'DNA' is usually defined as: deoxyribonucleic acid: an extremely long macromolecule that is the main component of chromosomes and is the material that transfers genetic characteristics in all life forms, constructed of two nucleotide strands coiled around each other in a ladderlike arrangement with the sidepieces composed of alternating phosphate and deoxyribose units and the rungs composed of the purine and pyrimidine bases adenine, guanin, cytosine, and thymine: the genetic information of the DNA is encoded in the sequence of the bases and is transcribed as the strands unwind and replicate.
Other options:
<h2>What are ribosomes?</h2>
A cell organelle constructed in the nucleolus and functioning as the site of protein synthesis in the cytoplasm; consists of rRNA and protein molecules, which make up two subunits.
<h2>What is protein?</h2>
Any of the numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the diet of all animals and other nonphotosynthesizing organisms, composed of 20 or more amino acids linked in a genetically controlled linear sequence into one more polypeptide chains, the final shape and other properties of each protein being determined by the side chains of the amino acids and their chemical attachments: proteins include such specialized form of collagen for supportive tissue, hemoglobin for transport, antibodies for immune defense, and enzymes for metabolism.
<h2>What is the mitochondria?</h2>
An organelle in the cytoplasm of cells that function in energy production.
The "powerhouse" of a cell.
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