HESI A2 Biology Exams Versions 1 & 2 (Latest
2024 Updates STUDY BUNDLE WITH COMPLETE
SOLUTIONS) Questions and Verified Answers|
100% correct| Grade A
kingdom - ANSWERlargest and most inclusive category
species - ANSWERmost restrictive category
hierarchic organizational system - ANSWERkingdom, phylum, class, order, family,
genius, species
steps to an experiment - ANSWER1. observation
2. hypothesis
3. experiment
4. conclusion
observation - ANSWERdata is observed and recorded/ previous data is studied
hypothesis - ANSWERa statement or explanation of certain events or happenings
experiment - ANSWERrepeatable procedure of gathering data to support or refute
the hypothesis
conclusion - ANSWERwhere the data and its significance are fully explained
aqueous - ANSWERwater based
water molecule consists of - ANSWERtwo hydrogen atoms covalently bonded to one
oxygen atom
most significant aspect of water is - ANSWERthe polarity of its bonds that allows for
hydrogen bonding between molecules
specific heat - ANSWERthe amount of heat necessary to raise the temperature of 1
gram of that molecule 1 degree celsius
water has high specific heat due to - ANSWERthe extent of hydrogen bonding
between water molecules, which allows waters to resist shifts in temperature (ability
of oceans or large bodies of water to stabilize climates)
cohesion - ANSWERthe ability of a molecule to stay bonded or attracted to another
molecule of the same substance (water running together on a newly waxed car)
, adhesion - ANSWERthe ability of water to bond to or attract other molecules or
substances (when water is sprayed onto the wall, some of it sticks to the wall)
when water freezes it forms - ANSWERlattice crystals; causing the molecules to
spread apart, resulting in the phenomenon of ice floating
polarity of water allows it to act as an - ANSWERversatile solvent (used to dissolve a
number of different solvents)
carbohydrates - ANSWERlongs chains, or polymers of sugar
-used for storage, structure, and energy
-the backbone of important molecules such as DNA and RNA
lipids - ANSWERknown as fats, but specifically they are fatty acids, phospholipids,
and steroids
fatty acids - ANSWERVary greatly but simply are grouped into two categories:
saturated and unsaturated
saturated fats - ANSWERcontain no double bonds in their hydrogen tail
-solids at room temp
-lead to cardiovascular problems associated with diets
unsaturated fats - ANSWERhave one or more double bonds
-liquid at room temperature
phospholipids - ANSWER-consist of two fatty acids of varying length bonded to a
phosphate group
-phosphate group is charged and therefore polar and soluble in water
steroids - ANSWER-component of membranes
-precursors to significant hormones and drugs
proteins - ANSWER-most significant contributor to cellular function
-polymeres of 20 molecules called amino acids
-complex, consist of several structural types and are the largest biological molecule
enzymes - ANSWERparticular types of proteins that are used to catalyze different
reactions or processes
(physical factors such as temperature and pH can alter the activity because they
have an effect on the shape)
*enzymes speed up reactions
Nucleic Acids - ANSWER-components of the molecules of inheritance
-DNA and RNA
2024 Updates STUDY BUNDLE WITH COMPLETE
SOLUTIONS) Questions and Verified Answers|
100% correct| Grade A
kingdom - ANSWERlargest and most inclusive category
species - ANSWERmost restrictive category
hierarchic organizational system - ANSWERkingdom, phylum, class, order, family,
genius, species
steps to an experiment - ANSWER1. observation
2. hypothesis
3. experiment
4. conclusion
observation - ANSWERdata is observed and recorded/ previous data is studied
hypothesis - ANSWERa statement or explanation of certain events or happenings
experiment - ANSWERrepeatable procedure of gathering data to support or refute
the hypothesis
conclusion - ANSWERwhere the data and its significance are fully explained
aqueous - ANSWERwater based
water molecule consists of - ANSWERtwo hydrogen atoms covalently bonded to one
oxygen atom
most significant aspect of water is - ANSWERthe polarity of its bonds that allows for
hydrogen bonding between molecules
specific heat - ANSWERthe amount of heat necessary to raise the temperature of 1
gram of that molecule 1 degree celsius
water has high specific heat due to - ANSWERthe extent of hydrogen bonding
between water molecules, which allows waters to resist shifts in temperature (ability
of oceans or large bodies of water to stabilize climates)
cohesion - ANSWERthe ability of a molecule to stay bonded or attracted to another
molecule of the same substance (water running together on a newly waxed car)
, adhesion - ANSWERthe ability of water to bond to or attract other molecules or
substances (when water is sprayed onto the wall, some of it sticks to the wall)
when water freezes it forms - ANSWERlattice crystals; causing the molecules to
spread apart, resulting in the phenomenon of ice floating
polarity of water allows it to act as an - ANSWERversatile solvent (used to dissolve a
number of different solvents)
carbohydrates - ANSWERlongs chains, or polymers of sugar
-used for storage, structure, and energy
-the backbone of important molecules such as DNA and RNA
lipids - ANSWERknown as fats, but specifically they are fatty acids, phospholipids,
and steroids
fatty acids - ANSWERVary greatly but simply are grouped into two categories:
saturated and unsaturated
saturated fats - ANSWERcontain no double bonds in their hydrogen tail
-solids at room temp
-lead to cardiovascular problems associated with diets
unsaturated fats - ANSWERhave one or more double bonds
-liquid at room temperature
phospholipids - ANSWER-consist of two fatty acids of varying length bonded to a
phosphate group
-phosphate group is charged and therefore polar and soluble in water
steroids - ANSWER-component of membranes
-precursors to significant hormones and drugs
proteins - ANSWER-most significant contributor to cellular function
-polymeres of 20 molecules called amino acids
-complex, consist of several structural types and are the largest biological molecule
enzymes - ANSWERparticular types of proteins that are used to catalyze different
reactions or processes
(physical factors such as temperature and pH can alter the activity because they
have an effect on the shape)
*enzymes speed up reactions
Nucleic Acids - ANSWER-components of the molecules of inheritance
-DNA and RNA
