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Biology Semester Exam
36 cards·by LCsoccer3
When diluting an acid always pour: a. water into acid, b. acid into water, c. the base into
water, d. water into the base
b. Acid into water
When is approved eye protection worn in the laboratory?
Any time chemicals, heat, or glassware are used.
A gram is about the same as the mass of a(n): a. apple, b. dime, c. science textbook, b. beaker
b. Dime
What is a graduated cylinder used to measure?
Volume
What is a triple-beam balance used to measure?
Mass
What is mass best defined as?
Amount of matter in an object
What should you do if you get a chemical in your eye?
Immediately flush with water and continue flushing for 15 minutes
In which units would the length of a river most likely be measured?
Kilometers
What is the independent variable?
A variable that you purposely manipulate
The liter is the standard unit in the metric system used to measure_______.
Volume
The amount of space an object takes up is ______.
Volume
The _____ is the standard unit in the metric system used to measure mass.
Gram
The curved surface of the liquid in a graduated cylinder is called the _____.
Meniscus
The prefix "kilo" means _______.
Thousand
In the scientific method, the _____ variable is the one being measured.
Dependent
Which element occurs in proteins but not carbohydrates or lipids?
Nitrogen
Triglycerides are so named because they are formed by a reaction between three fatty acid
molecules and one _______.
Glycerol
What enzyme in saliva helps breakdown starch?
Amylase
The attraction of unlike substances is called _____.
Adhesion
Surface tension involves ____.
Cohesion
The partial charges on a water molecule occur because of _________.
The unequal sharing of electrons between hydrogen and oxygen
Sweating has a cooling effect because of water's high ______.
Heat of vaporization
What is the alcohol found in triglyceride?
Glycerol
Monosaccharides are ______ sugars.
Simple
What are the two functional groups in amino acids?
The amino group and the carboxyl group
What is water's net charge?
0
Charged atoms are called _____.
Ions
Proteins also act as _____ in cells to control reactions.
Enzymes
What are macromolecules also known as?
Polymers
The 3 parts of a nucleotide are a 5 carbon ____, a phosphate, and a nitrogen base.
Sugar
In a covalent bond electrons are ____.
Shared
Inhibitors like poisons can _____ active sites.
Block
In order to evaporate, water must break it's _______ bonds.
Hydrogen
Ionic bonds always form between metals and _____.
Nonmetals
Sexual reproduction requires ___ parents.
2
What is required for all living things?
Sunlight