Microbiology Chapter 2

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Quiz on Chapter 2 Microbio

Questions and Answers

1.

Which is the smallest chemical unit of matter?
- A.
  
  An element.
- B.
  
  A molecule.
- C.
  
  An atom.
- D.
  
  Carbon (C)
- E.
  
  None of the above
Correct Answer
C. An atom.
2.

CO2 is an example of a
- A.
  
  Atom.
- B.
  
  Compound.
- C.
  
  electron.
- D.
  
  Element.
- E.
  
  None of the above.
Correct Answer
B. Compound.
3.

How many electrons can fit on the 2nd shell of an element?
- A.
  
  2
- B.
  
  4
- C.
  
  6
- D.
  
  8
- E.
  
  18
Correct Answer
D. 8
4.

If an atom looses an electron it has an overall __________ charge.
- A.
  
  Negative
- B.
  
  Neutral
- C.
  
  Positive
- D.
  
  None of the above.
Correct Answer
C. Positive
5.

Which ring of electrons would have the highest energy level?
- A.
  
  The first ring.
- B.
  
  The last ring.
- C.
  
  The second ring.
- D.
  
  They are all the same.
Correct Answer
B. The last ring.
6.

The nucleus of every atom bears a net _______ charge.
- A.
  
  Positive
- B.
  
  Negative
- C.
  
  Neutral
- D.
  
  None of the above.
Correct Answer
A. Positive
7.

An atom that looses an electron is called a ________, while an atom that gains an electron is called a _______.
- A.
  
  Nucleus, electron
- B.
  
  Anion, Cation
- C.
  
  Element, molecule
- D.
  
  Cation, Anion
Correct Answer
D. Cation, Anion
8.

A bond where pairs of electrons are shared in order to become stable is called
- A.
  
  A hydrogen bond
- B.
  
  A covalent bond
- C.
  
  An ionic bond.
- D.
  
  James bond.
- E.
  
  Polar bond.
Correct Answer
B. A covalent bond
9.

A hydrogen bond is the strongest of all bonds.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False
10.

A bond between a cation and an anion is called a
- A.
  
  Ionic bond
- B.
  
  Covalent bond.
- C.
  
  Hydrogen bond
- D.
  
  Polar bond
Correct Answer
A. Ionic bond

Explanation
An ionic bond occurs as a result of attraction between ions of opposite charges. Since a cation has lost an electron (giving it an overall positive charge) and an anion has gained an electron (making it a negative charge) the result is a bond of opposite charges also called an ionic bond.

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11.

Hydrogen bonds bind atoms into molecules.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False
12.

The attraction between oppositely charged regions of different molecules is called a ________ bond.
- A.
  
  Hydrogen
- B.
  
  Ionic
- C.
  
  Polar
- D.
  
  Covalent
Correct Answer
A. Hydrogen
13.

There are 4 main reasons that water is highly useful for living things, select all correct answers.
- A.
  
  Every molecule can form 4 hydrogen bonds with other water molecules.
- B.
  
  Water changes temperature very easily.
- C.
  
  The polarity of water makes it an excellent solvent
- D.
  
  Since water is extremely combustible it has many uses for living things.
- E.
  
  None of the above are correct.
Correct Answer(s)
A. Every molecule can form 4 hydrogen bonds with other water molecules.
C. The polarity of water makes it an excellent solvent
14.

In order for a compound to be considered organic it must contain these two elements.
- A.
  
  Sulfur and nitrogen
- B.
  
  Hydrogen and water
- C.
  
  Carbon and oxygen
- D.
  
  Hydrogen and carbon
- E.
  
  Proteins and carbohydrates.
Correct Answer
D. Hydrogen and carbon
15.

Monosaccharides, Disaccharides and Polysaccharides are the major groups of _________.
- A.
  
  Nucleic acids
- B.
  
  Proteins
- C.
  
  Lipids
- D.
  
  Carbohydrates
Correct Answer
D. Carbohydrates
16.

Starch is an example of a
- A.
  
  Polysaccharide
- B.
  
  Monosaccharide
- C.
  
  Protein
- D.
  
  Nucleic acid
Correct Answer
A. Polysaccharide
17.

Hundreds of monosaccharides joined together is called a __________.
- A.
  
  Microorganism
- B.
  
  Polysaccharide
- C.
  
  Bacteria
- D.
  
  Protein
- E.
  
  Two of the above
Correct Answer
B. Polysaccharide
18.

In order to be called a carbohydrate, the compound must include these three elements.
- A.
  
  C, H, and O
- B.
  
  N, H, and O
- C.
  
  S, N and Na
- D.
  
  None of the above are correct.
Correct Answer
A. C, H, and O

Explanation
all carbohydrates contain C, H, and O. Usually in a 1, 2, 1 ratio.

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19.

______ are essential to the structure and function of membranes.
- A.
  
  Proteins
- B.
  
  Monosaccharides
- C.
  
  Lipids
- D.
  
  Nucleic Acids
- E.
  
  Chuck Norris
Correct Answer
C. Lipids

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Jan 09, 2013

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Microbiology Chapter 2

Which is the smallest chemical unit of matter?

CO2 is an example of a

How many electrons can fit on the 2nd shell of an element?

If an atom looses an electron it has an overall __________ charge.

Which ring of electrons would have the highest energy level?

The nucleus of every atom bears a net _______ charge.

An atom that looses an electron is called a ________, while an atom that gains an electron is called a _______.

A bond where pairs of electrons are shared in order to become stable is called

A hydrogen bond is the strongest of all bonds.

A bond between a cation and an anion is called a

Hydrogen bonds bind atoms into molecules.

The attraction between oppositely charged regions of different molecules is called a ________ bond.

There are 4 main reasons that water is highly useful for living things, select all correct answers.

In order for a compound to be considered organic it must contain these two elements.

Monosaccharides, Disaccharides and Polysaccharides are the major groups of _________.

Starch is an example of a

Hundreds of monosaccharides joined together is called a __________.

In order to be called a carbohydrate, the compound must include these three elements.

______ are essential to the structure and function of membranes.

An atom that looses an electron is called a __, while an atom that gains an electron is called a _.