Christina Marshall
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Biology Quiz on Bio 110 Final: Chapter 2, created by Christina Marshall on 12/12/2017.

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Christina Marshall
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Bio 110 Final: Chapter 2

Question 1 of 10

1

___________________________________ make(s) up the nucleus of an atom.

Select one of the following:

  • Protons and electrons

  • Protons and neutrons

  • DNA and RNA

  • Neutrons and electrons

  • DNA only

Explanation

Question 2 of 10

1

Living organisms are composed mainly of which atoms?

Select one of the following:

  • calcium, hydrogen, nitrogen, and oxygen

  • carbon, hydrogen, nitrogen, and oxygen

  • hydrogen, nitrogen, oxygen, and helium

  • carbon, helium, nitrogen, and oxygen

  • carbon, calcium, hydrogen, and oxygen

Explanation

Question 3 of 10

1

The ability of an atom to attract electrons in a bond with another atom is termed its

Select one of the following:

  • hydrophobicity

  • electronegativity

  • solubility

  • valence

  • both a and b

Explanation

Question 4 of 10

1

Hydrogen bonds differ from covalent bonds in that

Select one of the following:

  • covalent bonds can form between any type of atom, and hydrogen bonds form only between H and O.

  • covalent bonds involve sharing of electrons, and hydrogen bonds involve the complete transfer of electrons

  • covalent bonds result from equal sharing of electrons, but hydrogen bonds involve unequal sharing of electrons.

  • covalent bonds involve sharing of electrons between atoms, but hydrogen bonds are the result of weak attractions between a hydrogen atom of a polar molecule and an electronegative atom of another polar molecule.

  • covalent bonds are weak bonds that break easily, but hydrogen ions are strong links between atoms that are not easily broken.

Explanation

Question 5 of 10

1

A free radical

Select one of the following:

  • is a positively charged ion.

  • is an atom with one unpaired electron in its outer shell.

  • is a stable atom that is not bonded to another atom

  • can cause considerable cellular damage

  • both b and d.

Explanation

Question 6 of 10

1

Chemical reactions in living organisms

Select one of the following:

  • require energy to begin

  • usually require a catalyst to speed up the process

  • are usually reversible

  • occur in liquid environments, such as water.

  • all of the above

Explanation

Question 7 of 10

1

Solutes that easily dissolve in water are said to be

Select one of the following:

  • hydrophobic

  • hydrophilic

  • polar molecules

  • all of the above

  • b and c only

Explanation

Question 8 of 10

1

The molecular mass of glucose is about 180 g/mol. If 45g of glucose is dissolved into a final volume of 0.5L of water, what is the molarity of the solution?

Select one of the following:

  • 0.125M

  • 0.25M

  • 0.5M

  • 1.0M

  • 2.0M

Explanation

Question 9 of 10

1

The sum of the atomic masses of all the atoms of a molecule is its

Select one of the following:

  • atomic weight

  • molarity

  • molecular mass

  • concentration

  • polarity

Explanation

Question 10 of 10

1

Reactions in which water is used to break apart other molecules are known as ___________________ reactions.

Select one of the following:

  • hydrophilic

  • hydrophobic

  • dehydration

  • anabolic

  • hydrolysis

Explanation

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