Daniel Brand
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Biology (Enzymes) Quiz on Enzymes, created by Daniel Brand on 28/02/2017.

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Daniel Brand
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Enzymes

Question 1 of 9

1

Which of the following statements correctly relates to enzymes? Check all that apply.

Select one or more of the following:

  • They are biological catalysts.

  • They are used up during reactions.

  • They are effective in small amounts.

  • They are found exclusively inside cells.

Explanation

Question 2 of 9

1

Select from the dropdown lists to complete the text.

Unlike ( chemical, biological, gastrointestinal, gaseous ) catalysts, enzymes do not require ( extreme, mild ) temperatures or ( pH, osmotic pressures, by-catalysts, dilution ) to function efficiently. Also, they ( don't, do, usually ) produce by-products, are highly ( specific, acidic, uncommon, insoluble ), and their activity can be regulated by cells.

Explanation

Question 3 of 9

1

Metabolic substrates and products sometimes regulate the activity of enzymes in their own and other metabolic pathways.

Select one of the following:

  • True
  • False

Explanation

Question 4 of 9

1

Fill the blank spaces to complete the text.

is an example of a four-polypeptide intracellular enzyme. It breaks down into oxygen and . is an extracellular enzyme produced by the and released into the . It breaks down into maltose. Similarly, t breaks down proteins into peptides.

Explanation

Question 5 of 9

1

Select from the dropdown lists to complete the text.

Enzymes bind to their substrate at their ( active, charged, tertiary, specific ) site. This consists of ( 6-10, 2-4, 60-100, 150-200 ) amino acids that form a ( tertiary, primary, secondary, quaternary ) structure which is ( complementary, reduced, synthesised, primary ) and ( specific, non-specific, an oxidising agent, a reducing agent ) to the substrate.
The role of ( cofactors, vitamins, active sites, polypeptides ) is to ensure that enzymes act at the appropriate rate.

Explanation

Question 6 of 9

1

Fill the blank spaces to complete the text.

ESC stands for .

Explanation

Question 7 of 9

1

Which of the following statements are TRUE about enzyme action?

Select one or more of the following:

  • Enzyme-substrate collisions are random.

  • Enzyme-substrate collisions happen less frequently when heat/kinetic energy is high.

  • Enzyme active site and substrate are specific and complementary.

  • The ESC is usually held together by covalent bonds.

  • Substrate(s) is/are broken down or combined while in the ESC.

Explanation

Question 8 of 9

1

The ESC is unstable, holding more energy than the substrate(s), which in turn holds more energy than the product(s).

Select one of the following:

  • True
  • False

Explanation

Question 9 of 9

1

Select from the dropdown lists to complete the text.

According to the ( induced, lock and key ) fit hypothesis, formation of the ESC creates subtle changes in the ( active site, solubility, pH ) ( tertiary, primary, secondary, quaternary ) structure, which allows ( bonds, polypeptides, enzymes, the lock-and-key ) to break and form during the biological reaction.

Explanation

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