Which of the following elements are commonly found as part of biological macromolecules? in other words, which elements will we spend a lot of time talking about? (choose all correct answers)
1. nitrogen2. carbon3. oxygen4. hydrogen

The correct answer is nitrogen, carbon, oxygen and hydrogen.

Explanation:

The four major biological macromolecules are lipids, carbohydrates, nucleic acid, and proteins. These macromolecules are part of our our diet which we consume. Lipids and carbohydrates contain carbon, oxygen and hydrogen element. Nucleic acid and proteins contain carbon, nitrogen, oxygen, and hydrogen.

Therefore nitrogen, carbon, oxygen, and hydrogen are the elements that are commonly found as a part of biological macromolecules and 95% of our body weight is because of these 4 elements. The ratio of these elements is different in each macromolecules.  

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.