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</div><h2>SL Paper 1</h2><div class="question">
<p>The graph shows the effect of increasing the substrate concentration on the rate of an enzyme-catalysed reaction. What is occurring during the phase indicated by section Y of the graph?</p>
<p style="text-align: center;"><img 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"></p>
<p style="text-align: left;">A. The active site of the enzyme is saturated.</p>
<p style="text-align: left;">B. The enzyme becomes denatured.</p>
<p style="text-align: left;">C. The substrate concentration has risen too high.</p>
<p style="text-align: left;">D. The optimum rate is reached.</p>
</div>
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