Chemistry Of Life Quiz 2
This quiz will help you review concepts and vocabulary needed for success in unit 2 of the MCPS biology course.
- 1.
Which of the following is NOT an organic compound?
- A.
Protein
- B.
Water
- C.
Carbohydrate
- D.
Lipid
Correct Answer
B. WaterExplanation
All of the organic compounds (lipds, carbs, proteins, and nucleic acids) all contain carbon. Water does not.Rate this question:
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- 2.
The monomer for any carbohydrate is ________.
- A.
A monosaccharide
- B.
Sucrose
- C.
Starch
- D.
Cellulose
Correct Answer
A. A monosaccharideExplanation
All carbohydrates can be made from the basic monomer for a carbohydrate--a monosaccharide (like glucose) with the formula C(6) H (12) O(6)Rate this question:
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- 3.
A disaccharide, such as sucrose, is composed of ________ monosaccharide molecules.
- A.
One
- B.
Two
- C.
Three or more
- D.
Any number
Correct Answer
B. TwoExplanation
Remember, the prefix di- means "two."Rate this question:
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- 4.
What is the smallest unit of water that still keeps its basic properties?
- A.
A lot
- B.
A drop
- C.
A molecule
- D.
An atom
Correct Answer
C. A moleculeExplanation
A single molecule of water will display polarity. There is no such thing as an atom of water, since it is composed of both hydrogen and oxygen atoms.Rate this question:
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- 5.
What is a subatomic particle with a negative electrical charge?
- A.
Neutron
- B.
Nucleus
- C.
Proton
- D.
Electron
Correct Answer
D. ElectronExplanation
The electron has an negative charge.Rate this question:
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- 6.
Molecules that have opposite charged regions, such as a water molecule, are said to be _______.
- A.
Mixture
- B.
Polar
- C.
Tropical
- D.
Solution
Correct Answer
B. PolarExplanation
This is the basic definition of "polarity."Rate this question:
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- 7.
Which of these is NOT part of a carbohydrate?
- A.
Hydrogen
- B.
Carbon
- C.
Magnesium
- D.
Oxygen
Correct Answer
C. MagnesiumExplanation
All carbohydrates contain carbon, hydrogen, and oxygenRate this question:
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- 8.
The total number of atoms in the molecule glucose, C6H12O6 is __________.
- A.
1
- B.
3
- C.
12
- D.
24
Correct Answer
D. 24Explanation
To determine the total number of atoms in a molecule, you must add the subscripts.Rate this question:
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- 9.
Cells use __________ for energy.
- A.
Carbohydrates
- B.
Water
- C.
Monomers
- D.
Polymers
Correct Answer
A. CarbohydratesExplanation
Carbohydrates supply energy. Water is important, but it doesn't provide energy. Although SOME monomers, like monosaccharides, and some polymers, such as starches, supply energy, not ALL do. These terms are too general.Rate this question:
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- 10.
Carbohydrates are best obtained from food sources such as _________.
- A.
Butter, peanut butter, and olive oil
- B.
Bread, pasta, oranges
- C.
Cheese, margarine, and nuts
- D.
Fish, beef, and chicken
Correct Answer
B. Bread, pasta, orangesExplanation
Recall the picture of carbohydrates from the flashcards that you studied.Rate this question:
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Mar 21, 2023Quiz Edited by
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Oct 20, 2009Quiz Created by
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