Download EOC Unit 2 Practice Test

Biology Unit 2: Biochemistry EOC Practice Test
1. An iodine solution is placed on the cut side of a potato. Within seconds, a blue-black color appears.
What is most likely occurring?
A. a positive test for proteins
B. a positive test for starches
C. a negative test for proteins
D. a negative test for starches
2. A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases.
Which has occurred?
A. The swollen gums have absorbed the saltwater solution.
B. The saltwater solution lowers the temperature of the water in the gums.
C. The salt in the solution has moved against the concentration gradient.
D. The water in the gums has moved from a high to a low concentration of water
3. This diagram shows an enzyme-substrate complex. Which is represented by Structure X?
A. substrate
B. product
C. enzyme
4. RNA and DNA are which type of organic compound?
A. carbohydrate
B. lipid
C.
nucleic acid
D. complex
D. protein
5. What will most likely happen if an appropriate enzyme is added to a chemical reaction?
A. The reaction rate will increase.
B. The equilibrium of the reaction will be maintained.
C. The reaction rate will decrease.
D. The reaction
6. Refer to the illustration below. Molecules like molecule 1 are found in
A. carbohydrates.
B. nucleic acids.
C. lipids.
D. proteins.
7. Which organic molecule below is most closely related to proteins?
A. amino acids
B. nucleotides
C. CH2 chains
D. sugars
8. Long chains of amino acids are found in
A. carbohydrates.
B. proteins.
C. lipids.
D. sugars.
9. Which of the following is true regarding the caloric value of the major groups of organic molecules
found in the body?
A. Carbohydrates have a higher caloric value than both proteins and lipids
B. Lipids, carbohydrates and proteins have equal caloric value
C. Lipids have a higher caloric value than both carbohydrates and proteins
D. Proteins have a higher caloric value than both carbohydrates and lipids
10. The table above shows the results of an experiment done by Juan and Cindy. Juan and Cindy
placed hydrogen peroxide on several food samples and recorded the relative amount of fizz that each
produced. The fizz was produced by oxygen bubbles released by the action of the enzyme catalase,
which is found in almost every living cell. Which of these is a valid conclusion from their data?
A. Plant cells produce more oxygen bubbles than animal cells.
B. Raw liver produced the most oxygen bubbles, followed by raw potato.
C. Boiled potato and cooked liver produced the most oxygen bubbles.
D. Cooking the foods seems to increase the activity of the catalase enzyme.
11. Amylase increases the rate at which starch is broken down into glucose. What kind of molecule is
amylase?
A. lipid
B. carbohydrate
C. enzyme
D. nucleic acid
12. A food that is high in Calories and could be used for energy storage in animals is MOST LIKELY
high in
A. lipids.
B. carbohydrates.
C. proteins.
D. nucleic acids.
13. Animals store most of their excess energy reserves as _______ because
A. glucose; it is easy to break down.
B. protein; it is a compact source of energy in their bodies.
C. fat; they store twice as much energy per gram.
D. carbohydrates; they store twice as much energy per gram of glucose.
14. The sequence of ________________ in a DNA molecule determines the protein that will be
produced.
A. lipids
B. proteins
C. nucleotides
D. sugars
15. A ___________ chain is a sequence of amino acids that is the foundation for the basic structure of
a protein.
A. polynomial
B. polysaccharide
C. polypeptide
D. polyunsaturated
16. Below is an image of the cell membrane. Using you knowledge of the structure of a cell membrane
and structure of organic molecules, which characteristic of lipids allows the cell membrane to form a
barrier between the inside and outside of a cell?
A. Lipids do no readily dissolve in water
B. Lipids readily dissolve in water
C. Phosphates do not readily dissolve in water
D. None of the above
17. A catalyst is present a biochemical reaction. Which of the following would you NOT expect to
occur?
A. The reaction will occur at a lower temperature than normal
B. the catalyst will be consume and is unable to be used again
C. the enzyme involved is specific to this type of reaction is not likely useful in another reaction of a
different type
D. The catalyst requires a specific pH range in order to be most effective.
20. Which of the following can affect the rate at which a biochemical reaction will occur?
A. Temperature Change
B. Fluctuations in pH
C. Presence of a catalyst
D. All of the above
21. Polysaccharides are
A. carbohydrates.
B. proteins.
C. lipids.
D. unsaturated fats.
22. Food that is high in Calories and could be used for energy storage in animals is MOST LIKELY
high in
A. lipids.
B. carbohydrates.
C. proteins.
D. nucleic acids.
23. You eat 5 grams of a carbohydrate, how many calories have you consumed?
A. 5 calories
B. 20 calories
C. 25 calories
D. 4 calories
24. Which of the following represents an accurate analogy regarding the structure of organic
molecules?
A. Polysaccharides : monosaccharides : : Glycerol and fatty acids : lipids
B. Proteins : amino acids : : monosaccharides : polysaccharides
C. Polysaccharides : monosaccharides : : glycerol and fatty acids : lipids
D. Amino acids : proteins :: monosaccharides : carbohydrates
25. Which of the following is a function of lipids within the human body?
A. Transportation of hemoglobin throughout the body
B. Accelerate the speed of chemical reactions
C. Cushioning of vital organs
D. Short term energy storage