HSA Review: Lessons 1 - 4: Question Preview (ID: 1646)

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A dog gets many nutrients from its food including amino acids. Which of these can be built directly using the amino acids?
a) proteins
b) carbohydrates
c) lipids
d) minerals

The cell wall of a plant helps the plant cell maintain its shape. What is the main structural component of the cell wall of a plant?
a) lipid
b) cellulose
c) amino acid
d) nucleic acid

When the cells of most organisms freeze, they burst. Which property of water causes this to occur?
a) Water is a universal solvent.
b) Water changes temperature rapidly.
c) Water is less dense as a solid than as a liquid.
d) Water is a nonpolar molecule.

The major role of carbohydrates in the human diet is to
a) form cell membranes
b) catalyze cellular reactions
c) supply energy for the body
d) provide building blocks for proteins

Vitamins have important functions in the human body and are necessary for maintaining good health. Which of these is necessary for proper bone formation?
a) Vitamin A
b) Vitamin C
c) Vitamin D
d) Vitamin K

In circulatory systems, a large part of the fluid is water. For example, human blood plasma is approximately 90% water. Which of these properties of water makes it an ideal material for dissolving necessary chemical substances?
a) Water freezes at 0В°C.
b) Water evaporates at 100В°C.
c) Water molcules are polar.
d) Water molecules are stable.

Plants such as the Venus flytrap and the sundew attract and consume insects. These plants are able to produce substances which break down the insect into compounds that are usable by the plant. One element obtained from these compounds is nitrogen.
a) lipids
b) minerals
c) enzymes
d) nucleic acids

Venus flytraps and other carnivorous plants obtain much of their nitrogen from amino acids found in the insects. Which of these chemical compounds are the source of the amino acids?
a) lipids
b) proteins
c) nucleic acids
d) carbohydrates

Meat tenderizer is made with pepsin, an enzyme. A cook usually puts tenderizer on meat and then cooks the meat. If meat coated with tenderizer is placed in a refrigerator for a short time prior to cooking, how will the enzyme pepsin be affected?
a) Pepsin will be broken down.
b) Pepsin activity will slow down.
c) Pepsin molecules will change shape.
d) Pepsin will no longer behave as an enzyme.

Starch from food is a source of energy for organisms. Starch is a type of
a) protein
b) vitamin
c) nucleotide
d) carbohydrate

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