What is a chromosome? In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. Chromosomes are not visible in the cellâs nucleusânot even under a microscopeâwhen the cell is not dividing.
Once candidates have completed the CNA program required in the state they want to practice in, they will have to pass a state certification exam to receive their professional credential. Generally, nursing assistants are not expected to have previous work experience before they become certified.
Become a Social Worker. 1  Table of Contents. 2  Several basic tiers of social work careers reflect the level of education and amount of social work training one has received. To become a social worker in any state, you are required to have at least a bachelor's degree for entry-level positions. More advanced practitioners need higher levels of education and professional licensure. Social work licensure requirements vary widely by state, so be sure to read about your state's requirements.