BIO 141 EXAM 1 STUDY QUESTIONS
What are the four most common elements? - CORRECT ANSWER-Hydrogen,
oxygen, carbon, nitrogen
What is the difference between and atom and a molecule? - CORRECT
ANSWER-An atom is composed of subatomic particles and the smallest unit of
an element
A molecule is 2 or more atoms combing to form a distinctive particle
What does it mean that water is polar? - CORRECT ANSWER-There is an
uneven distribution of electrical density
Partial (-) charge near oxygen atom and (+) charge near hydrogen atom
What are the bonds that are reorganized when water changes from gas to liquid?
- CORRECT ANSWER-Hydrogen Bonds
What is the definition of an electrolyte? - CORRECT ANSWER-Substances that
release ions in water
What is pH a measure of? - CORRECT ANSWER-H+ concentration in solution
What is the definition of an acid? What pH values are acidic? - CORRECT
ANSWER-Substances that ionizes water to release hydrogen ions
Acidic pH values are 0-6
In a solution containing a buffer that is a pH 7.4. What would happen if you add a
few drops of base? - CORRECT ANSWER-It would stay the same because a
buffer is present in the solution
What feature defines all carbohydrates? - CORRECT ANSWER-Sugars
, How are glucose and glycogen related? Which is a monosaccharide and a
polysaccharide? - CORRECT ANSWER-Glucose makes up glycogen. Glucose is
a monosaccharide and glycogen is a polysaccharide.
How are monosaccharides and polysaccharides related? - CORRECT
ANSWER-Monosaccharides are made up of simple sugars and polysaccharides
are larger, longer chains of those simple sugars.
What is on characteristic of all lipids? - CORRECT ANSWER-They are insoluble
3 differences between saturated and unsaturated fatty acids - CORRECT
ANSWER-1. Saturated fatty acids have a single carbon-carbon bond that link all
the carbon atoms: Unsaturated fatty acids have 1 more double bond more than
between carbon atoms
2. Saturated: Solid (EXAMPLE: ANIMAL FAT)
Unsaturated: Liquid (EXAMPLE: OIL)
3. Rigid molecule: saturated
Kinked molecule: unsaturated
What is a triglyceride? - CORRECT ANSWER-A lipid composed of 3 fatty acids
and a glycerol molecule
The bodies most common lipid, stored in fat tissue as energy supply.
Insulation beneath the skin.
What is the function of phospholipid? - CORRECT ANSWER-Form membrane
that surround cell and intracellular organelles like the mitochondria.
Membrane is fluid, semi-permeable bilayer that separates cells contents from the
environment.
What are proteins composed of? - CORRECT ANSWER-Amino acids
What are the four most common elements? - CORRECT ANSWER-Hydrogen,
oxygen, carbon, nitrogen
What is the difference between and atom and a molecule? - CORRECT
ANSWER-An atom is composed of subatomic particles and the smallest unit of
an element
A molecule is 2 or more atoms combing to form a distinctive particle
What does it mean that water is polar? - CORRECT ANSWER-There is an
uneven distribution of electrical density
Partial (-) charge near oxygen atom and (+) charge near hydrogen atom
What are the bonds that are reorganized when water changes from gas to liquid?
- CORRECT ANSWER-Hydrogen Bonds
What is the definition of an electrolyte? - CORRECT ANSWER-Substances that
release ions in water
What is pH a measure of? - CORRECT ANSWER-H+ concentration in solution
What is the definition of an acid? What pH values are acidic? - CORRECT
ANSWER-Substances that ionizes water to release hydrogen ions
Acidic pH values are 0-6
In a solution containing a buffer that is a pH 7.4. What would happen if you add a
few drops of base? - CORRECT ANSWER-It would stay the same because a
buffer is present in the solution
What feature defines all carbohydrates? - CORRECT ANSWER-Sugars
, How are glucose and glycogen related? Which is a monosaccharide and a
polysaccharide? - CORRECT ANSWER-Glucose makes up glycogen. Glucose is
a monosaccharide and glycogen is a polysaccharide.
How are monosaccharides and polysaccharides related? - CORRECT
ANSWER-Monosaccharides are made up of simple sugars and polysaccharides
are larger, longer chains of those simple sugars.
What is on characteristic of all lipids? - CORRECT ANSWER-They are insoluble
3 differences between saturated and unsaturated fatty acids - CORRECT
ANSWER-1. Saturated fatty acids have a single carbon-carbon bond that link all
the carbon atoms: Unsaturated fatty acids have 1 more double bond more than
between carbon atoms
2. Saturated: Solid (EXAMPLE: ANIMAL FAT)
Unsaturated: Liquid (EXAMPLE: OIL)
3. Rigid molecule: saturated
Kinked molecule: unsaturated
What is a triglyceride? - CORRECT ANSWER-A lipid composed of 3 fatty acids
and a glycerol molecule
The bodies most common lipid, stored in fat tissue as energy supply.
Insulation beneath the skin.
What is the function of phospholipid? - CORRECT ANSWER-Form membrane
that surround cell and intracellular organelles like the mitochondria.
Membrane is fluid, semi-permeable bilayer that separates cells contents from the
environment.
What are proteins composed of? - CORRECT ANSWER-Amino acids
