Biochem Lecture 2
This is Biochemistry Lecture 2, which continues the discussion of organic compounds, specifically Lipids and Nucleic Acids.
Lipids and Nucleic Acids Quiz
This is the 5-question quiz covering the key concepts from Biochem Lecture 2 (Honors Lecture 3).
Start
Question 1 |
What is (are) the monomer(s) of a lipid?
A | Monosaccharide Hint: This is actually the monomer of a carbohydrate; not a lipid. |
B | Triglyceride Hint: This is actually the polymer of a lipid; not the monomer |
C | Glycerol and 3 Fatty Acids |
D | Polysaccharide Hint: This is actually the polymer of a carbohydrate; not the monomer of a lipid. |
Question 1 Explanation:
Right! Lipids don't follow the traditional brick-to-house analogy. Instead the polymer (a Triglyceride) is made of a Glycerol backbone and 2 fatty acid tails (the monomers).
Question 2 |
Which of the following are liquid at room temperature?
A | Saturated fats Hint: Saturated fats are actually solid at room temperature. |
B | Unsaturated fats |
C | Animal fats Hint: Animal fats are saturated fats, so they're solid at room temperature. |
D | Butter Hint: Butters are saturated fats, so they're solid at room temperature. |
Question 2 Explanation:
Yeah! Because unsaturated fats have double bonds that bend their fatty acid tails, they don't clump together as tightly and are therefore liquid at room temperature!
Question 3 |
Which of the following is not a function of lipids?
A | They are the body's immediate energy source. |
B | They are a secondary source of energy. Hint: This is actually a function of lipids. They are not the most efficient source of energy, but they will be used if the body's low on carbohydrates. |
C | They make up the major components of the cell membrane. Hint: This is a very important function of lipids. If you removed lipids completely from your diet, your new cells could not develop a cell membrane properly. |
D | They are used for long-term energy storage Hint: This is a major function. Because they're not the most efficient source of energy, they are often stored for use later. |
Question 3 Explanation:
Great job! I hope you remember that carbohydrates are the body's immediate source of energy. Lipids are only used in the absence of carbohydrates, for the most part.
Question 4 |
Which of the following is not part of a nucleotide?
A | Phopshate Hint: These are very important parts of the outside of a nucleotide. |
B | Carbohydrate Hint: This is tricky. Nucleotides do have a sugar, which you'll remember, is a carbohydrate. |
C | Lipid |
D | Nitrogen Base Hint: Nitrogen bases are actually the parts of a nucleotide that give all of the information for the cell. |
Question 4 Explanation:
Nice! A nucleotide is made of a phosphate, a sugar, and a nitrogen base. There is no room for lipids within nucleic acids.
Question 5 |
What are the four bases found in DNA?
A | A, T, C, and G |
B | A, U, C, and G Hint: These are actually the bases in RNA; something we'll talk more about later. |
C | A, T, & T Hint: This is actually a company name. Try again. |
D | P, B, & J Hint: This is actually a favorite snack of mine. Try again. |
Question 5 Explanation:
Excellent! The four bases in DNA are Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).
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