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Building Blocks of Life — Test Answers

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A scientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas. Which group of statements best describe all of the materials he is using in the investigation?

A
They are each compounds. Each of the compounds is made of atoms. All of the atoms are made of matter.
B
They are each made of matter. Some are compounds and some are elements. They all contain atoms.
C
They are all elements. Some contain molecules of the same type of atom. Some contain different types of atoms.
D
They are each made of matter. Some are compounds made of one type of element. Some are pure atoms.
23

What is a difference between starch and glycogen?

A
Starch is a monomer, and glycogen is a polymer.
B
Starch is composed of fructose, and glycogen is composed of glucose.
C
Starch stores energy, and glycogen provides structural support.
D
Starch is found in plants, and glycogen is found in animals.
24

What is the best conclusion based on this data?

A
Blood is a primary location for energy storage.
B
A gram of glycogen has twice as much energy as a gram of fat.
C
Fat molecules contain more energy-containing bonds than simple sugars.
D
The human body stores approximately 1,000 kcal of glucose.
25

Which type of lipid is shown?

A
an unsaturated phospholipid
B
a saturated triglyceride
C
an unsaturated triglyceride
D
a saturated phospholipid

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