Building Blocks of Life Answers
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Which element is the basis for all living things and can combine with other elements in many ways?
A
phosphorusB
carbonC
oxygenD
sulfur2
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carbohydrateslipidsproteinsnucleic acids
A
carbohydratesB
lipidsC
proteinsD
nucleic acids3
In these chemical compounds, C is for carbon, O is for oxygen, N is for nitrogen, H is for hydrogen and K is for potassium.Which chemical compound is organic?
A
H2OB
C12H22O11C
KNO3D
KOH4
The chart shows the percentage of different elements in the human body.
A
nitrogenB
hydrogenC
carbonD
oxygen5
Which best describes a molecule?
A
a unit made of different kinds of elementsB
a unit made of only one kind of elementC
a unit made of two or more atomsD
a unit made of a single atom6
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.7
Which example is most likely an inorganic compound?
A
methane, which is made of carbon and hydrogenB
glucose, which is a sugar made by plantsC
sodium chloride, which is a saltD
human DNA, which is a molecule in cells8
Which kind of molecule is used by organisms to store and transmit genetic material?
A
nucleic acidB
carbohydrateC
proteinD
lipid9
Which is the smallest possible particle of an element?
A
moleculeB
atomC
compoundD
matter10
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.Did you find these answers helpful?
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