Problem 2 What types of molecules are enzy... [FREE SOLUTION]

Chapter 1: Problem 2

What types of molecules are enzymes? Name three physiologic processes that involve enzymes.

Short Answer

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Answer: Enzymes are proteins that act as biological catalysts, responsible for speeding up chemical reactions in living organisms. Three physiological processes that involve enzymes are digestion (with enzymes like amylase, protease, and lipase), cellular respiration (with enzymes such as hexokinase, phosphofructokinase, and pyruvate dehydrogenase), and DNA replication (involving enzymes like DNA helicase, DNA polymerase, and DNA ligase).

Step by step solution

1. Identify the type of molecules enzymes are

Enzymes are proteins that act as biological catalysts. They are responsible for speeding up the rate of chemical reactions in living organisms by lowering the activation energy required for the reaction to occur.

2. Example 1 - Digestion

One physiological process that involves enzymes is digestion. In the digestive system, enzymes like amylase, protease, and lipase are responsible for breaking down complex molecules such as carbohydrates, proteins, and fats into simpler molecules that can be easily absorbed by the body. For example, amylase breaks down starch into maltose, protease breaks down proteins into amino acids, and lipase breaks down fats into glycerol and fatty acids.

3. Example 2 - Cellular respiration

Another physiological process involving enzymes is cellular respiration. This process takes place in the mitochondria of cells and involves a series of chemical reactions that convert nutrients into energy in the form of adenosine triphosphate (ATP) molecules. Enzymes such as hexokinase, phosphofructokinase, and pyruvate dehydrogenase play key roles in the different steps of the process, such as glycolysis, the citric acid cycle, and oxidative phosphorylation.

4. Example 3 - DNA replication

A third physiological process that relies on the function of enzymes is DNA replication, which is the process by which DNA is copied during cell division. Various enzymes are involved in this process, including DNA helicase, which unwinds and separates the two strands of the DNA double helix; DNA polymerase, which synthesizes new complementary strands using the originals as templates; and DNA ligase, which links the newly synthesized DNA fragments together into a complete, continuous strand.

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What types of molecules are enzymes? Name three physiologic processes that involve enzymes.

Short Answer

Step by step solution

1. Identify the type of molecules enzymes are

2. Example 1 - Digestion

3. Example 2 - Cellular respiration

4. Example 3 - DNA replication

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