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| 1. |
Functional groups are __________.
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| 2. |
In chemical reactions, the molecules that take part in the reaction are called reactants. Conversely, molecules produced by a chemical reaction are called products. During the process of polymerization (synthesis of biological polymers), water is a __________, and the reaction is consequently called a __________ reaction.
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| 3. |
Carbohydrates are a class of biological molecules that include __________.
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| 4. |
The general class of biological molecules that contains large, nonpolar regions that make these molecules insoluble in water is called __________.
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| 5. |
Saturated fats __________.
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| 6. |
Phospholipids contain a "head group" that is _________ and two fatty acid "tails" that are __________.
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| 7. |
Proteins are polymers of __________.
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| 8. |
Protein functions in cells include __________.
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| 9. |
A nucleotide is composed of __________.
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| 10. |
Imagine that you see a diagram of molecular structures in which the atoms are shown as dots and covalent bonds are shown as lines between the dots. The molecules in the diagram have a variety of complex shapes, including long chains, branched chains, rings, and combinations of chains and rings. What type of molecules are these and what is the key atom in them?
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| 11. |
At the gym one day, you notice a new "Energy Bar" being sold that advertises quick energy for your workout. To impress you further, it is claimed this bar contains only carbon, oxygen, and hydrogen atoms. What kind of biological molecule(s) would you be eating if you ate an "Energy Bar"?
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| 12. |
A scientist is studying the metabolism of proteins in yeast and wants to follow the formation of proteins from the earliest possible point. In her experiment, she will feed the yeast radioactive nutrients and follow the fate of the radioactivity in the cells. Which of the following atoms will allow her to exclusively follow proteins in the cell?
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| 13. |
How are large organic molecules (macromolecules) synthesized?
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| 14. |
Carbohydrates __________.
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| 15. |
A cell membrane is primarily composed of __________.
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| 16. |
Proteins are macromolecules that can perform many different functions within an organism. This diversity of function for this macromolecule is due to the unique nature of one of its four functional groups that is bound to a central carbon atom. Which functional group is responsible for the wide diversity of function attributed to proteins?
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| 17. |
The quaternary level of protein structure __________.
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| 18. |
Nucleotides __________.
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| 19. |
All of the following are polysaccharides except __________.
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| 20. |
You have identified a protein that is unable to form disulfide bridges. This would affect which of the following?
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| 21. |
All of the following are proteins except __________.
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| 22. |
What types of biological molecules transport fat molecules through the human bloodstream?
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| 23. |
Which of the following is not found in DNA?
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| 24. |
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| 25. |
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| 26. |
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| 27. |
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| 28. |
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| 29. |
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| 30. |
Correctly identify the carbohydrate molecules below.
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For each item below, use the pull-down menu to select the letter that labels the correct part of the image.
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| 31. |
Identify the levels of protein structure as depicted below.
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For each item below, use the pull-down menu to select the letter that labels the correct part of the image.
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| 32. |
Identify each of the following functional groups.
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For each item below, use the pull-down menu to select the letter that labels the correct part of the image.
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| 33. |
Identify the type of reaction indicated below. Also identify the molecules involved.
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For each item below, use the pull-down menu to select the letter that labels the correct part of the image.
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| 34. |
Label the portions of the molecule below.
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For each item below, use the pull-down menu to select the letter that labels the correct part of the image.
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| 35. |
Which of the following is not a function of polysaccharides
in organisms?
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| 36. |
Characteristics of carbon that contribute to its ability to
form an immense diversity of organic molecules include its
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| 37. |
Foods that are high in fiber are most likely to be derived
from
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| 38. |
Proteins differ from one another because
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| 39. |
Which, if any, of the following choices does not properly
pair an organic compound with one of its building blocks
(subunits)?
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| 40. |
Which of the following statements about lipids is false?
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Answer choices in this exercise are randomized and will appear in a different order each time the page is loaded.
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