Building Blocks of Life Answers

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The Venn diagram compares organic and inorganic compounds.

Question illustration
A
Made from phosphorus and oxygen
B
Not made from living things
C
Made from every element except carbon
D
Not made from elements
2
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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
3

Which statement is true about inorganic compounds?

A
They are not made of atoms.
B
They contain carbon.
C
They are not made from living things.
D
They are all elements.
4

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
5

Which element is the basis for all living things and can combine with other elements in many ways?

A
phosphorus
B
carbon
C
oxygen
D
sulfur
6

Which two elements make up water?

A
oxygen and phosphorus
B
oxygen and hydrogen
C
hydrogen and sulfur
D
hydrogen and phosphorus
7

Rebekah is studying a molecule and trying to determine if it is DNA or RNA. Which kind of molecule is she studying?

A
carbohydrate
B
protein
C
nucleic acid
D
lipid
8

carbohydrateslipidsproteinsnucleic acids

A
carbohydrates
B
lipids
C
proteins
D
nucleic acids
9

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
10

The chart shows the percentage of different elements in the human body.

Question illustration
A
nitrogen
B
hydrogen
C
carbon
D
oxygen

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