Biochemistry Test Review

There are 2000 kinds of edible insects in the world, and they are becoming an increasingly popular source of protein. One cup of cricket flour contains over 28 grams of protein. The building blocks of the protein in cricket flour are

• amino acids

• water

• simple sugars

• carbohydrates

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The basic building blocks of a protein are

• glucose molecules

• amino acids

• hormones

• fats

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The graph represents the effect of pH on three different enzymes at normal body temperature.

The graph illustrates that enzymes 1, 2, and 3

• are not affected by pH

• work best at different pH levels

• work best in an acidic environment

• work best in a basic environment

The diagrams represent two molecules that are involved in metabolic activities in some living cells.

The shape of each of the molecules is important because

• molecules having different shapes are always found in different organisms

• the shape of a molecule determines how it functions in chemical reactions

• the shape of a molecule determines the age of an organism

• if the shape of any molecule in an organism changes, the DNA in that organism will also change

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Which row in the chart correctly pairs a food molecule with its building block?

• 1

• 2

• 3

• 4

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Which statement is supported by the information in the graph?

• the enzymes respond in a similar way to changes in temperature

• the enzymes in bacteria function best at 40°C

• the enzymes function best at the same temperature

• the enzymes break down the same substances

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The inability of an organism to produce certain proteins can occur when an organism is lacking an enzyme needed to combine

• oxygen molecules

• simple sugars

• amino acids

• biological catalysts

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The function of a specific enzyme is most directly influenced by its

• molecular size

• physical shape

• carrying capacity

• stored energy

Which statement explains the importance of maintaining a constant internal environment to ensure proper enzyme functioning?

• Changes in pH and temperature will cause the enzyme reaction rate to be to fast

• Temperature and pH determine amino acid sequences in enzymes

• Changes in pH will change the genetic instructions of enzymes

• Increasing the temperature and pH can alter the specific shape of enzymes

Small molecules are combined to form large molecules by the life function of

• regulation

• excretion

• transport

• synthesis

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