BIO Quiz 2

1 of 20

The subatomic particles that play the greatest role in cellular chemical reactions are electrons. protons. neutrons. isotopes.

Question 2 of 20

The structural unit that retains the properties of an element is the molecule. atom. cell. electron.

Question 3 of 20

Which of the following are found in the nucleus of an atom? Protons Neutrons Electrons A and B

Question 4 of 20

The component of an atom or molecule that is most important in determining its chemical properties is the isotope. neutron. electron. proton.

Question 5 of 20

What is the maximum number of electrons the innermost shell can hold? 1 2 4 8

Question 6 of 20

An atom becomes an ion when it gains or loses electrons. it gains or loses protons. it shares hydrogen atoms. it gains or loses neutrons.

Question 7 of 20

The symbol 3CO2 represents one atom of oxygen and three atoms of carbon. three atoms of carbon and one molecule of oxygen. three molecules of carbon dioxide. one atom of carbon and three atoms of oxygen.

Question 8 of 20

In water, hydrogen bonding occurs between the hydrogen and an oxygen atom in the same molecule. an oxygen atom in a different molecule. a hydrogen atom in a different molecule. a hydrogen atom in the same molecule.

Question 9 of 20

Covalent bonds form when one atom _________ its _________ with another atom. gives up; electrons shares; protons gives up; neutrons shares; electrons

Question 10 of 20

Water is an important solvent of life because it forms covalent bonds. it has cohesive properties. it forms hydrogen bonds. it is ionic.

Question 11 of 20

Carbon is such an important molecule for life because it can form chemical bonds with a maximum of four other atoms. it can hydrogen bond to so many other molecules. it forms ionic bonds. it can form isomers.

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