Answer: Option B) Common salt
Explanation:
An inorganic compound is one that does not contain carbon at all or contain carbon atoms that are not covalently bound to other atoms.
Hence, unlike kerosene, sugar and alcohol, common salt with the chemical formula NaCl has no carbon atoms, this will be regarded as an inorganic compound.
<span>The nucleolus is the structure within the nucleus of eukaryotic cells. It consists of RNA, DNA, and proteins. The nucleolus is involved in ribosome biogenesis which results in the synthesis of ribosomes. Ribosomal RNA (rRNA) is transcribed from DNA in the nucleolus. rRNA is processed into three mature RNAs and together with proteins form ribosomal subunits. After subunits form the ribosomes, they are transported out of the nucleus to the cytoplasm where they take place in translation.</span>
<em>Four main classes that define a macromolecules are</em><em> </em>
- <em>Protein</em>
- <em>carbohydrates </em>
- <em>lipids</em>
- <em>nucleic acid</em>
<u>EXPLANATION: </u>
Macro-molecule is a large molecule which can contain more than 100's and 1000's of atoms. They are different from the smaller molecules and each macro-molecule does more than one function.
Macro-molecules are made up of single elements of monomers joined using covalent bonds and a large polymer is formed. For example, one molecule of polyethylene which is plastic has more than 2500 methylene groups, each one of them has two hydrogen and one carbon atoms.
