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This activity contains 60 questions.

Question 1
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Select the hydrocarbon from the following choices.
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Question 2
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Which is an organic molecule?
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Question 3
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Which element is closely associated with the field of organic chemistry?
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Question 4
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Carbon atoms are the most versatile molecular building blocks used by living organisms because _____.
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Question 5
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Citric acid makes lemons taste sour. Which of the following is a functional group that would cause a molecule such as citric acid to be acidic?
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Question 6
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Which of these is found in amines?
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Question 7
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Choose the pair of terms that completes this sentence: Hydroxyl is to _____ as _____ is to amine.
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Question 8
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Although the structures of the functional groups important to life vary in chemical structure, they share one thing in common: They _____.
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Question 9
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Ethanol, propanol, and methanol are three simple alcohols. They can be grouped together because they _____.
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Question 10
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The ionized or dissociated carboxyl group may be written as _____.
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Question 11
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Choose the pair of terms that completes this sentence about functional groups in organic chemistry: Carboxyl is to _____ as _____ is to base.
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Question 12
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What is the process by which cells link monomers together to form polymers?
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Question 13
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In a hydrolysis reaction, _____. In this process, water is _____.
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Question 14
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Besides water, most of the mass of a typical cell is present in the form of one of these four categories of macromolecules: _____.
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Question 15
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Lactose is a disaccharide (two monosaccharides joined together). To metabolize lactose, individuals require an enzyme known as lactase. What is true about this reaction?
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Question 16
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Which of the following molecules is a carbohydrate?
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Question 17
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Carbohydrates are mainly used in our bodies _____.
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Question 18
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Consider the figure shown below. What one characteristic is shared by sucrose and maltose?

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Question 19
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Which of the following is a function of carbohydrates (as a class)?
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Question 20
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When two monosaccharides link to form a disaccharide, the by-product is _____.
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Question 21
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The most common disaccharide is _____.
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Question 22
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In the process of converting cornstarch into high fructose corn syrup, one of the first products is _____. Then, enzymes are used to convert some of this product to fructose.
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Question 23
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Cellulose is a _____ made of many _____.
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Question 24
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Generally, animals cannot digest the linkages between the glucose molecules in cellulose. How then do cows get enough nutrients from eating grass?
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Question 25
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In what polysaccharide form do plants store sugar to be available later for energy?
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Question 26
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The complex carbohydrate that you are most likely to have eaten recently is _____.
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Question 27
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A polysaccharide that we use for storing energy in our muscles and livers is _____.
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Question 28
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Which of the following components of a tossed salad will pass through the human digestive tract with the least digestion?
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Question 29
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A glucose molecule is to starch as _____.
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Question 30
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Lipids differ from other large biological molecules in that they _____.
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Question 31
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Which is the correct term for compounds that do not mix with water?
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Question 32
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Nutritionally, saturated triglycerides are considered to be less healthy than unsaturated triglycerides. Consider the differences between the two molecules shown below. What is one major difference between them?

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Question 33
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A fatty acid containing at least two double bonds is called _____.
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Question 34
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Manufacturers make vegetable oils solid or semisolid by _____.
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Question 35
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Hydrogenated vegetable oils are more like animal fats than other plant oils. Because they _____ than other plant oils, they can contribute to cardiovascular disease.
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Question 36
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The lipids that form the main structural component of cell membranes are _____.
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Question 37
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Cholesterol belongs to which class of molecules?
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Question 38
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Some athletes use anabolic steroids to build their body mass. Why is this considered a problematic practice, especially in adolescents?
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Question 39
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Tetrahydrogestrinone (THG) is an anabolic steroid. How does it differ from more traditional anabolic steroids that have been used in the past by athletes?
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Question 40
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The ovalbumin in egg white can be classified as which type of protein?
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Question 41
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How many different kinds of amino acids are there in most proteins?
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Question 42
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Protein molecules are polymers of _____.
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Question 43
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Which of these is found in amino acids?
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Question 44
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The peptide bond is _____.
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Question 45
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To what does the term polypeptide specifically refer?
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Question 46
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Which of the following would be affected when a protein is denatured?
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Question 47
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Two proteins have the same number and type of amino acids. How is it that they can have different shapes and therefore different functions?
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Question 48
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The formation of a peptide bond is shown below. The bond forms through _____.

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Question 49
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Enzyme molecules require a specific shape to perform their catalytic function. Which of the following might alter the protein shape?
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Question 50
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The "primary structure" of a protein refers to _____.
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Question 51
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The alpha helix and pleated sheet represent which level of protein structure?
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Question 52
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The overall three-dimensional shape of a single polypeptide is called the _____.
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Question 53
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How does a protein's quaternary structure differ from other levels of protein structure?
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Question 54
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Collagen is found in connective tissue, which is a structural component of bones, tendons, and ligament. Collagen has great strength because of its _____ structure.
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Question 55
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Which of the following do nucleic acids and proteins have in common?
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Question 56
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Based on the way the nitrogen-containing bases in DNA and RNA pair, you would expect the percentage of _____ to be equal to the percentage of _____. Look at the figure carefully.

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Question 57
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How does DNA differ from RNA?
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Question 58
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A nucleotide is made of which of the following chemical components? Look carefully at the figure below to determine the answer.

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Question 59
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A shortage of phosphorus in the soil would make it especially difficult for a plant to manufacture _____.
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Question 60
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Lactose tolerance is an adaptation _____.
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