Bio 170 Exam Comprehensive
Questions with Verified Answers
Graded A+
1. All lipids contain Answer: carbon, hydrogen, oxygen
2. Fossil lipid bilayer Answer: A universal component of a cell membranes. Provides the
barrier that marks the boundaries of a cell.
3. What can't pass through a bilayer Answer: Ionic
4. Why can some things pass through a bilayer? Answer: Because of the chemical
and structural nature of the phospholipid bilayer, only lipid-soluble molecules and some small
molecules are able to freely pass through the
lipid bilayer
5. Difference between DNA and RNA Answer: DNA is double stranded and RNA is a
stranded molecule. DNA uses based adenine, thymine, cytosine, and guanine. RNA uses adenine
uracil cytosine and guanine.
6. DNA and RNA monomers Answer: A 5 carbon sugar, a phosphate group, and a
nitrogenous base
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