Microbiology Chapter 2
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Quiz on Chapter 2 Microbio
- 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
- 2.CO2 is an example of a
- A.
Atom.
- B.
Compound.
- C.
electron.
- D.
Element.
- E.
None of the above.
- 3.How many electrons can fit on the 2nd shell of an element?
- A.
2
- B.
4
- C.
6
- D.
8
- E.
18
- 4.If an atom looses an electron it has an overall __________ charge.
- A.
Negative
- B.
Neutral
- C.
Positive
- D.
None of the above.
- 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.
- 6.The nucleus of every atom bears a net _______ charge.
- A.
Positive
- B.
Negative
- C.
Neutral
- D.
None of the above.
- 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
- 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.
- 9.A hydrogen bond is the strongest of all bonds.
- A.
True
- 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
- 11.Hydrogen bonds bind atoms into molecules.
- A.
True
- B.
False
- 12.The attraction between oppositely charged regions of different molecules is called a ________ bond.
- A.
Hydrogen
- B.
Ionic
- C.
Polar
- D.
Covalent
- 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.
- 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.
- 15.Monosaccharides, Disaccharides and Polysaccharides are the major groups of _________.
- A.
Nucleic acids
- B.
Proteins
- C.
Lipids
- D.
Carbohydrates
- 16.Starch is an example of a
- A.
Polysaccharide
- B.
Monosaccharide
- C.
Protein
- D.
Nucleic acid
- 17.Hundreds of monosaccharides joined together is called a __________.
- A.
Microorganism
- B.
Polysaccharide
- C.
Bacteria
- D.
Protein
- E.
Two of the above
- 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.
- 19.______ are essential to the structure and function of membranes.
- A.
Proteins
- B.
Monosaccharides
- C.
Lipids
- D.
Nucleic Acids
- E.
Chuck Norris
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