It is Chromosomes
Meaning: Chromosomes is a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes
Others who can sign a death certificate<span> include a primary physician, an attending physician, a non-attending physician, a medical examiner, a nurse practitioner, a forensic pathologist or a coroner, but it varies according to state law. In Texas, for example, a justice of the peace can </span>sign<span>.
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Phospholipids and proteins
I believe it is C.) Tasting a solution you think is edible after creating it in the lab.
I could be wrong though.