BIO Quiz 2

Topics: Atom, Hydrogen, Oxygen Pages: 10 (572 words) Published: January 24, 2015


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.

Question

12 of 20

Pure water has a pH of ________ because it is_________.

0; neither acidic nor basic
1; acidic
7; neither acidic nor basic
14; basic

Question

13 of 20

Hydrolysis could be correctly described as

heating a compound to drive off excess water and concentrate its volume. breaking of a long-chain compound into its subunits by adding water to the structure between its subunits. constant removal of hydrogen atoms from a carbohydrate.

None of the above.

Question

14 of 20

Carbohydrate monomers are united into a polymer by means of

dehydrogenation.
hydrolysis.
reverse osmosis.
dehydration synthesis.

Question

15 of 20

Polysaccharides are made up of

Amino acids.
nucleotides.
sugars.
lipids.

Question

16 of 20

Butter is made of milkfat and tends to be hard at room temperature. Which of the following could be used to make the butter softer at room temperature?
Create more double bonds in the fatty acid chains
Make fatty acid chains with fewer kinks
Saturate the fatty acid chains
Make the fatty acid chains longer

Question

17 of 20

Proteins are made up of

Amino acids.
nucleotides.
sugars.
lipids.

Question

18 of 20

An organic molecule that may contain the –NH2 group is

a triglyceride.
an enzyme.
a starch.
a glucose molecule.

Question

19 of 20

DNA is made up of:

Amino acids.
proteins.
nucleotides.
sugars.

Question

20 of 20

Which of the following describes a special type of protein that causes metabolic reactions to proceed at a much greater rate than they normally would?
Enzyme
Fatty Acid
Amino Acid
Coenzyme
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Essay about Bio Quiz 2
  • BIO100 quiz 2 Essay
  • BIO100 Lesson 2 Quiz 2 Essay
  • Quiz 2 Bio 100 Research Paper
  • bio asesmnet unit 2 Essay
  • Bio Quiz Essay
  • Bio Quiz 2 Research Paper
  • MAT 540 Week 2 Quiz Essay

Become a StudyMode Member

Sign Up - It's Free