Lipids are important parts of biological membranes and waterproof coverings.

Proteins that speed up the rate of chemical reactions in a cell without requiring high temperatures are called antibodies.

The substances that are present when a chemical reaction begins are called the products.

In an experiment to test the affect of temperature on the rate of bacterial reproduction, the temperature would be the dependent variable

In an experiment to test the affect of temperature on the rate of bacterial reproduction the rate of bacterial reproduction would be the dependent variable.

In an experiment to test the affect of temperature on the rate of bacterial reproduction, a good control group would be the species of bacteria

In an experiment to test the affect of temperature on the rate of bacterial reproduction, a constant would be the species of bacteria.

Enzymes are proteins that speed up chemical reactions.

Normal body temperature of humans is 40 degree celcius. Therefore an enzyme with an optimum activity temperature of 75 degrees celcius might be found in humans.

Enzymes are one of the four major groups of organic compounds.

Amino acid is to protein as

A monosaccharide is a

Which of the following IS NOT a function of proteins?

Which statement is true?

Enzymes affect chemical reactions in living cells by changing the

When hydrogen and oxygen combine to form water, water is

What is the term used to describe the energy needed to get a reaction started?

When carbon dioxide and water combine during photosynthesis to produce glucose and oxygen, the reactants are

When carbon dioxide and water combine during photosynthesis to produce glucose and oxygen, the products are

Which of the following statements about enzymes is NOT true?

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