Unit 1: Char of Life, Biochem, and Enzymes

Which statement best describes the enzyme represented in the graph?

• This enzyme works best at a temperature of 35 degrees Celsius

• This enzyme works best at 10 degrees Celsius

• This enzyme works best at 50 degrees Celsius

• Temperature has no effect on the enzyme

• This enzyme works best at a pH of 8

• This enzyme works best at a pH of 50

• pH does not have any effect on an enzyme.

• This enzyme is inhibited by a pH of 8.

Proteins differ from one another because

• the number of nucleotides differs

• each protein contains its own sequence of sugar molecules

• the sequence of amino acids is different for each protein

• peptide bonds determine the function of proteins

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What is the independent variable for this graph?

• number of animals

• Wolf population

• moose population

• years

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Which of the following would be a function of the nucleic acids?

• store energy

• movement

• genetic information

• insulation

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Which class of biomolecule includes monosaccharides like glucose, and polysaccharides like starch?

• nucleic acids

• carbohydrates

• lipids

• proteins

Polar bears eat as much food as they can during the summer months because they need the extra calories to survive the harsh winter conditions. What type of biomolecules would the polar bear need to consume during the summer for this protection in the winter?

• lipids

• carbohydrates

• proteins

• nucleic acids

The enzyme amylase is found in saliva and assists with the break down of starch into glucose. Explain how this occurs without affecting the chemical makeup of the amylase.

• Amylase bonds to the starch to speed up the reaction and detaches itself when complete, without being affected.

• Amylase does not take place in the starch reaction, but raises the temperature of the saliva to speed up the reaction.

• Amylase changes starch into a vapor which increases the reaction rate, but is recreated by the glucose.

• Amylase transfers all of its energy to the the starch molecules to slow down the reaction, but does not take place in the reaction.

Amino Acids are to proteins as

• nucleotides are to nucleic acids

• monosaccharides are to lipids

• fatty acids are to carbohydrates

• enzymes are to disaccharides

Which of the following is not a characteristic of living things?

• all living things are composed of cells

• all living things need energy

• all living things grow and develop

• all living things breathe carbon dioxide

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