AnswersAISD-Biology A CR - 25-26Building Blocks of Life

Building Blocks of Life Answers

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Which best describes a molecule?

A
a unit made of different kinds of elements
B
a unit made of only one kind of element
C
a unit made of two or more atoms
D
a unit made of a single atom
3

Which statement best compares and contrasts lipids and carbohydrates?

A
Both are used for energy storage, but only carbohydrates are used for long-term energy storage.
B
Both are used for energy storage, but only carbohydrates are used for short-term energy storage.
C
Both are used for tissues, but only carbohydrates are used for tissue growth.
D
Both are used for tissues, but only lipids are used for tissue growth.
5

Which example is most likely an inorganic compound?

A
methane, which is made of carbon and hydrogen
B
glucose, which is a sugar made by plants
C
sodium chloride, which is a salt
D
human DNA, which is a molecule in cells
7

Which two elements make up water?

A
oxygen and phosphorus
B
oxygen and hydrogen
C
hydrogen and sulfur
D
hydrogen and phosphorus
8

Aluminum is an element. Which best describes what makes up a sample of aluminum?

A
one kind of atom
B
two different kinds of atoms
C
all carbon-based atoms
D
a carbon atom and non-carbon atoms

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