Test: Enzymes - Year 11 MCQ

They serve as nutrients for cells.

They act as biological catalysts, speeding up chemical reactions.

They store genetic information.

They provide structural support to cells.

It allows the enzyme to catalyze any chemical reaction.

It ensures that the enzyme can bind to any substrate.

It enables the enzyme to bind only to specific substrates.

It causes the enzyme to become inactive.

It speeds up its activity.

It becomes more active.

It undergoes denaturation and loses its shape.

It converts into a different enzyme.

The presence of amylase.

The breakdown of starch by amylase.

The temperature of the solution.

The pH level of the solution.

The enzyme's shape changes permanently.

Higher temperatures decrease enzyme-substrate collisions.

Increased temperature provides more energy, leading to more frequent collisions between enzyme and substrate.

The substrate concentration decreases with temperature.

It enhances the enzyme’s activity.

It has no effect on the enzyme.

It disrupts the enzyme's active site, reducing its activity.

It converts the enzyme into a different form.

The enzyme is inactive.

The enzyme is functioning optimally at that pH.

The starch is not present in the mixture.

The iodine solution is contaminated.

They become too active and decompose.

They undergo permanent denaturation, losing their specific shape.

They convert into non-enzyme molecules.

They require more substrate to function.

To ensure the enzyme remains inactive.

To prevent the enzyme from denaturing.

To standardize the pH levels.

To increase the concentration of substrates.

To increase the enzyme concentration.

To maintain a constant pH level.

To change the enzyme's shape.

To speed up the reaction rate.