Biology - HESI A2 Questions With
Answers
Hierarchic system of organization - CORRECT ANSWER-King Phillip Came Over For
Good Soup (mnemonic for taxonomy order: Kingdom, Phylum, Class, Order, Family,
Genus, Species)
Process of science - CORRECT ANSWER-hypothesis, experiment, conclusion
What is the substance that makes life possible? - CORRECT ANSWER-Water
What is the most significant aspect of water? - CORRECT ANSWER-the polarity of it's
bonds
It is the polar nature of water that allows what to happen between molecules? -
CORRECT ANSWER-hydrogen bonding
Due to water's high specific heat value, it resists shifts in - CORRECT ANSWER-
temperature
cohesion is the ability of a molecule to - CORRECT ANSWER-stay bonded or attracted
to another molecule of the same substance
Adhesion is the ability of - CORRECT ANSWER-water to bond or attract other
molecules or substances
Why does water float when in solid form? - CORRECT ANSWER-the molecules form a
lattice, which causes the molecules to spread apart, resulting in floating
what is it called when water is said to be used to dissolve a number of different
substances? - CORRECT ANSWER-versatile solvent
What are the most important functions of carbohydrates? - CORRECT ANSWER-
storage, structure and energy
Carbohydrates are made of - CORRECT ANSWER-long chains, or polymers, of sugar
fatty acids, phospholipids, and steroids are also known as - CORRECT ANSWER-lipids
saturated fats contain - CORRECT ANSWER-no double bond in thier hydrocarbon tail
, unsaturated fats contain - CORRECT ANSWER-one or more double bonds
__________ are solid at room temperature - CORRECT ANSWER-saturated fats
__________ are liquid at room temperature - CORRECT ANSWER-unsaturated fats
What type fat contributes to cardiovascular problems? - CORRECT ANSWER-saturated
fats
Phospholipids consist of 2 fatty acids of varying length bondes to a - CORRECT
ANSWER-phosphate group
Which type of lipid is a precursor to significant hormones? - CORRECT ANSWER-
steroids
What biological molecule is the most significant contributor to cellular function? -
CORRECT ANSWER-proteins
What are the largest of biological molecules; made up of polymers of 20 molecules
called amino acids? - CORRECT ANSWER-proteins
What is the function of an enzyme? - CORRECT ANSWER-to catalyze different
reactions or processes
two nucleic acids - CORRECT ANSWER-DNA & RNA
DNA - CORRECT ANSWER-Deoxyribonucleic acid, a self-replicating material present
in nearly all living organisms as the main element of chromosomes. It is the carrier of
genetic information
RNA - CORRECT ANSWER-Ribonucleic acid, a nucleic acid present in all living cells.
Its principal role is to act as a messenger carrying instructions from DNA for controlling
the synthesis of proteins
What is the sum of all chemical reactions that occur in an organism? - CORRECT
ANSWER-metabolism
In a cell, reactions take place in a series of steps called - CORRECT ANSWER-
metabolic pathways (progressing from a standpoint of high energy to low energy)
What are tiny structures that carry out functions necessary for the cell to stay alive -
CORRECT ANSWER-organelles
organisms that lack a defined nucleus and membrane bound organelles - CORRECT
ANSWER-procaryotic cells
Answers
Hierarchic system of organization - CORRECT ANSWER-King Phillip Came Over For
Good Soup (mnemonic for taxonomy order: Kingdom, Phylum, Class, Order, Family,
Genus, Species)
Process of science - CORRECT ANSWER-hypothesis, experiment, conclusion
What is the substance that makes life possible? - CORRECT ANSWER-Water
What is the most significant aspect of water? - CORRECT ANSWER-the polarity of it's
bonds
It is the polar nature of water that allows what to happen between molecules? -
CORRECT ANSWER-hydrogen bonding
Due to water's high specific heat value, it resists shifts in - CORRECT ANSWER-
temperature
cohesion is the ability of a molecule to - CORRECT ANSWER-stay bonded or attracted
to another molecule of the same substance
Adhesion is the ability of - CORRECT ANSWER-water to bond or attract other
molecules or substances
Why does water float when in solid form? - CORRECT ANSWER-the molecules form a
lattice, which causes the molecules to spread apart, resulting in floating
what is it called when water is said to be used to dissolve a number of different
substances? - CORRECT ANSWER-versatile solvent
What are the most important functions of carbohydrates? - CORRECT ANSWER-
storage, structure and energy
Carbohydrates are made of - CORRECT ANSWER-long chains, or polymers, of sugar
fatty acids, phospholipids, and steroids are also known as - CORRECT ANSWER-lipids
saturated fats contain - CORRECT ANSWER-no double bond in thier hydrocarbon tail
, unsaturated fats contain - CORRECT ANSWER-one or more double bonds
__________ are solid at room temperature - CORRECT ANSWER-saturated fats
__________ are liquid at room temperature - CORRECT ANSWER-unsaturated fats
What type fat contributes to cardiovascular problems? - CORRECT ANSWER-saturated
fats
Phospholipids consist of 2 fatty acids of varying length bondes to a - CORRECT
ANSWER-phosphate group
Which type of lipid is a precursor to significant hormones? - CORRECT ANSWER-
steroids
What biological molecule is the most significant contributor to cellular function? -
CORRECT ANSWER-proteins
What are the largest of biological molecules; made up of polymers of 20 molecules
called amino acids? - CORRECT ANSWER-proteins
What is the function of an enzyme? - CORRECT ANSWER-to catalyze different
reactions or processes
two nucleic acids - CORRECT ANSWER-DNA & RNA
DNA - CORRECT ANSWER-Deoxyribonucleic acid, a self-replicating material present
in nearly all living organisms as the main element of chromosomes. It is the carrier of
genetic information
RNA - CORRECT ANSWER-Ribonucleic acid, a nucleic acid present in all living cells.
Its principal role is to act as a messenger carrying instructions from DNA for controlling
the synthesis of proteins
What is the sum of all chemical reactions that occur in an organism? - CORRECT
ANSWER-metabolism
In a cell, reactions take place in a series of steps called - CORRECT ANSWER-
metabolic pathways (progressing from a standpoint of high energy to low energy)
What are tiny structures that carry out functions necessary for the cell to stay alive -
CORRECT ANSWER-organelles
organisms that lack a defined nucleus and membrane bound organelles - CORRECT
ANSWER-procaryotic cells
