Question 1: Describe two features that viruses share with what biologists typically define as life. Describe two features that viruses do not share with other forms of life.
Question 2: We discussed features that are shared by all living things. Can you name two ways in which these kingdoms differ from one another? Describe these two features, and give examples of how one or more kingdoms vary with respect to this feature.
Question 3: How many atoms of hydrogen would an atom of silicon (Si) bind to in its most stable form? Explain your reasoning. What type of bond connects the silicon and hydrogens? Where in the periodic table does Si appear in relation to carbon (C)?
Question 4: Both carbohydrates and lipids contain carbons and hydrogen. What is different about the structure of these two molecules that allows you to tell them apart?