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30 terms

Biology 201

Liberty University's Dr. Sphon's EXAM 1 study tool.
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hydrophilic
A polar molecule can be described as being
fill electron shells that are occupied but not full
Atoms form chemical bonds in an effort to
When an electron moves to a shell further from the nucleus, it loses energy.
Which of the following statements concerning electrons is false?.
monosaccharide
Glucose is an example of a:
It has 100 times more hydroxide ions.
How does the H+ concentration of a solution with a pH of 5 compare to a solution with a pH of 3?
oppositely charged regions of polar molecules that contain covalently bonded hydrogen
Hydrogen bonds occur between:
Water comprises 30% of blood.
Which of the following statements describing water is false?
occur between atoms sharing 1 pair of electrons
Single bonds:
6 protons and 6 neutrons
The atomic number of carbon is 6, and the atomic mass is This indicates that one atom of carbon will contain:
an atom
The smallest functional unit of matter is:
a double bond
What type of bond is found in the fatty acid tail of an unsaturated fat that is not found in the fatty acid tail of a saturated fat?
13
Which of the following is the pH of a strong base?
the placement of polar and charged groups in the chain of amino acids
What determines the way a protein will fold up to form the tertiary structure?
denaturation
Which term refers to permanent changes that occur to a protein if for example it is exposed to high temperatures?
cholesterol
Which of the following is an example of a steroid?
False
Cellulose is a polysaccharide synthesized by plants and digested by humans for energy. T/F
False
A molecule that can donate H+ to solution is called a base. T/F
True
An enzyme is a protein that functions as a biological catalyst. T/F
False
A subatomic particle that has one positive charge and is located in the nucleus is a neutron.T/F
True
An isotope contains more or fewer neutrons than found normally in an atom of a particular element.T/F
True
DNA is double stranded and RNA is single stranded.T/F
False
Proteins are macromolecules composed of long strings of single units called nucleic acids T/F
True
The structure of phospholipids includes a water-soluble phosphate group and water-insoluble fatty acid tails. T/F
True
Organic compounds are broken down during the chemical process of hydrolysis. T/F
True
The primary level of protein structure is represented by the sequence of amino acids. T/F
True
A buffer is a substance which minimizes potential changes in pH. T/F
False
A solute is a liquid in which other substances will dissolve. T/F
False
Once an ATP molecule is used by a cell, the ADP that is left must be removed from the cell since it cannot be recycled. T/F
False
Triglycerides are polar and thus are soluble in water. T/F
False
Oligosaccharides are composed of thousands of monosaccharides arranged in straight or branched chains. T/F