Quiz 2 Flashcards
The class of lipids forming a major part of cell membranes is \_\_\_\_\_\_\_\_\_. steroids nucleic acids polysaccharides triglycerides phospholipids
phospholipids
A long chain of simple sugars would be a(n) protein nucleic acid polysaccharide monosaccharide
polysaccharide
RNA plays a role in which of the following?
Transferring hereditary information from cell to cell when cells divide
Copying instructions from DNA
Transferring hereditary information from cell to cell when cells divide
Synthesizing proteins and copying instructions from DNA
Synthesizing lipids
Synthesizing proteins and copying instructions from DNA
Triglycerides consist of a 3-carbon compound called __________ bound to three __________.
glycerol; fatty acids
The breakdown of glucose to yield carbon dioxide, oxygen, and ATP can be described as __________.
catabolic and exergonic
Choose the correct statement regarding mixtures and compounds.
Most mixtures in our bodies consist of compounds dissolved or suspended in water.
In a mixture, each substance takes on new chemical properties.
A compound has properties much different from the properties of its elements.
All mixtures are also compounds.
A compound has properties much different from the properties of its elements.
When table salt, sodium chloride (NaCl), is placed in water __________.
Ionic bonds between Na+ and Cl- are broken
Na+ and Cl- form ionic bonds with each other
Na+ and Cl- form hydrogen bonds with water
Ionic bonds between Na+ and Cl- are broken
Chemical reactions in which larger molecules are broken down into smaller ones are called catabolic reactions.
True
False
True
AB → A + B
Catabolic reaction
A + B → AB
Anabolic reaction
AB+CD → AC + BD
Exchange reaction
Glucose + galactose => lactose is an example of _______.
an anabolic reaction
Identify the factors that govern the speed and direction of a reaction.
Reaction rates increase when the reactants are more concentrated.
Reaction rates increase when the products are more concentrated.
Reaction rates increase as the temperature rises.
Reaction rates decrease when catalysts are present.
Reaction rates increase when the reactants are more concentrated.
Reaction rates increase as the temperature rises.
ATP + glucose => glucose-6-phosphate + ADP is an example of _________.
an exchange reaction
Anabolism consists of energy-releasing reactions, such as the production of protein or fat.
True
False
False