Chapter 7 Biology Test Review

Which organic molecule functions as energy storage in animal cells?

• protein

• nucleotide

• complex carbohydrate

• simple carbohydrate

In the periodic table of the elements, elements in Group 1 have how many outer electrons?

• 8

• 1

• 0

• 4

Which is NOT a use of radioactive isotopes in the fields of health and science?

• Measuring volume

• Calculating the age of fossils

• Diagnosing medical conditions

• Irradiating food

Which statement about elements and the human body is false?

• Elements are not found in the human body.

• Radioactive elements are used to measure cellular activity.

• Elements are essential for basic life processes.

• Deficiencies in certain elements can impair function.

Select the correct element for the following function in the body: needed for heart and kidney function.

• calcium

• iron

• magnesium

• potassium

Select the correct element for the following function in the body: helps build healthy teeth and bones.

• calcium

• iron

• magnesium

• potassium

Select the correct element for the following function in the body: needed for nerve and muscle function.

• calcium

• iron

• magnesium

• potassium

Going across one period in the periodic table of the elements, all the elements in that period have the same number of protons.

• True

• False

Elements cannot be broken down into other substances by physical or chemical means.

• True

• False

What causes an ion to form?

• an atom gives up a proton to another atom

• an atom loses neutrons

• an atom gives up an electron to another atom

• an atom gains neutrons