Biology Worksheet 101 With Answer Key - Professor Fournier Page 4
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15Bio 101
25. Which class of molecules is responsible for speeding up chemical
reactions?
A) Sugars
B) Fats
C) Genetic material
D) Enzymes
26. Base your answer to the following question on Experiments
revealed the following information
about a certain molecule:
— It can be broken down into amino acids.
— It can break down proteins into amino
acids.
— It is found in high concentrations in the
small intestine of humans.
This molecule is most likely
A) an enzyme
B) an inorganic compound
C) a hormone
D) an antigen
27. Base your answer to the following question on Hydrogen peroxide
(H
O
) is a toxic by-product of cellular metabolism in aerobic
2
2
organisms. The reaction below occurs within the cells to prevent the
accumulation of hydrogen peroxide.
In this reaction, catalase functions as an
A) enzyme in the breakdown of hydrogen peroxide
B) enzyme in the synthesis of hydrogen peroxide
C) emulsifier in the digestion of hydrogen peroxide
D) indicator in the detection of hydrogen peroxide
Base your answers to questions 28 and 29 on the graph below and your knowledge of biology.
28. Neither enzyme works at a pH of
A) 1
B) 5
C) 3
D) 13
29. Pepsin works best in which type of environment?
A) acidic, only
B) basic, only
C) neutral
D) sometimes acidic, sometimes basic
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