Biiology A Week 8

Based on this data, this enzyme functions best at what temperature and pH?

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B.9 (C) Enzymes, 2017-Q8

Based on the data, this enzyme functions best at what temperature and pH?

• 27C and a pH of 4

• 37C and a pH of 6

• 40C and a pH of 8

• 50C and a pH of 10

Answer explanation

The question asks about the optimal temperature and pH for an enzyme's function. Based on the answer, the enzyme works best at a temperature of 37C and a pH of 6. This indicates that these conditions are the most favorable for the enzyme's activity, as they provide an environment in which the enzyme can perform its function most efficiently.

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B.9 (C) Enzymes, 2017-Q8

Which statement about enzyme activity is best supported by this graph?

• An Enzyme must be composed of multiple polypeptides, or sub units, to be active.

• An enzyme's rate of activity increases with time until it becomes inactive.

• An enzyme functions best under specific temperature conditions.

• An enzyme woks equally well in bacteria that are adapted to high temperatures and in eukaryotic cells such as human cells.

Answer explanation

The graph is likely showing how the rate of enzyme activity changes with temperature. This supports the correct answer that an enzyme functions best under specific temperature conditions. This is due to enzymes having an optimal temperature at which they function most effectively. At temperatures above or below this optimal range, the enzyme's activity decreases.

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B.9 (C) Enzymes, 2017-Q8

Which statement explains the effect of an inhibitor on an enzyme?

• A substrate will be able to bond with the enzyme.

• The enzyme will likely be attacked by immune cells.

• The enzyme will be unable to produce more enzymes.

• A substrate will be unable to attach to the enzyme.

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B.9 (C) Enzymes, 2017-Q8

Wat are the products of the cellular processes in these organelles?

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B.9(B) Photosynthesis and Cellular Respiration

Organize these options into the right categories

Groups:

(a) Chloroplast

,

(b) Mitochondria

• Where photosynthesis occurs

• Found only in plant cells

• Reactants: Glucose (C₆H₁₂O₆), Oxygen (O₂)

• 
• Where Cellular respiration occurs

• Products: Carbon Dioxide (CO2), Water (H2O), ATP

• Products: Glucose, and Oxygen (O2)

• 
• Found in Animal and Plant Cells

• Reactants: Light, Carbon Dioxide (CO2), Water (H2O)

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B.9(B) Photosynthesis and Cellular Respiration

Select the correct chain reaction

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B.9(B) Photosynthesis and Cellular Respiration

Select the correct answer.

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B.9(B) Photosynthesis and Cellular Respiration

The role of a coenzyme in an enzymatic reaction is (a)   .

• It increases the rate of the reacti
• It decreases the rate of the reacti
• It has no effect on the reaction.
• It stops the reaction.

What is the effect of pH on enzyme activity?

• Enzyme activity increases with increase in pH.

• Enzyme activity decreases with increase in pH.

• Enzyme activity is not affected by pH.

• Enzyme activity is optimal at a specific pH.

Answer explanation

The activity of enzymes is strongly influenced by pH. Each enzyme has an optimal pH range at which it can perform best. This is due to the shape of the enzyme's active site, which is sensitive to changes in pH. If the pH deviates from this range, the enzyme activity can decrease or even stop altogether. Hence, the enzyme activity is optimal at a specific pH.