HESI A2 Biology Practice Questions 2025 | Complete Exam
Prep with Correct Verified Answers
Which organelle is responsible for protein synthesis? - correct answerRibosome
Why is yeast used to make bread rise? - correct answerYeast carries out fermentation,
producing ethanol and carbon dioxide
How is mitosis different from meiosis? - correct answerMeiosis creates sex cells with
half the # of chromosomes of the parent cell where as mitosis creates cells that are
exact copies of each other, down to the number of chromosomes
What can be altered? - correct answerDNA
What is single stranded? - correct answerRNA
What contains uracil? - correct answerRNA
What codes for proteins? - correct answerDNA
Imagine that two parents both carry the recessive gene for cystic fibrosis. Any
homozygous recessive offspring will manifest the disease. What percentage of the
offspring is predicted to be carriers but not manifest the disease? - correct answer50
percent
A cell is in a solution in which the concentration of solutes is higher inside the cell than
outside the cell. What would you expect to happen to the cell? - correct answerIt will
swell and probably burst/hypotonic situation
What is the purpose of phloem tissue in plant stems? - correct answerIt conducts food
throughout the plant, it is the system of narrow tubes that transports sugars and other
nutrients
Physical factors such as temperature and pH can alter enzyme activity because they
have an effect on the enzyme's - correct answerShape, the shape of an enzyme
controls it's fit with its substrate.
Which part of a plants reproductive system is of a different gender than others? - correct
answerStamen (male reproductive organ)
What kind of symbiosis exists between a pneumonia bacterium and a human? - correct
answerParasitism, one organism benefits off another
, The scientific name for a house cat is Felis catus. This indicates the house cats what? -
correct answerGenus; species
Kingdom/animalia
Phylum/Chordata
Class/mammalia
Order/carnivora
Family/felidae
Genus/ Felis
Species/catus
Beeswax is an example of what kind of molecule? - correct answerLipid, waxes oils and
fats are lipids
What takes place in a lysosome? - correct answerFood is digested, the lysosome
contains digestive enzymes. The job of a lysosome is to digest food for cells and break
down cells waste products
Which organism reproduces via binary fission? - correct answerSalmonella
In which phase of cell division do the chromosomes replicate? - correct
answerInterphase-active phase of a cells reproductive life, the cell produces nucleic
acids and proteins and doubled its # of chromosomes
In a strand of DNA, you would expect to see adenine paired with? - correct
answerThymine/adenine
Cytosine/guanine
Hemophilia is a sex linked trait carried on the X chromosome. In an example of a male
with hemophilia and a female carrier, what ratio of the offspring is predicted to have the
disease? - correct answer1 female: 0 male
What is represented by this formula 6CO2+6H2O=>C6H12O6+6O2 - correct
answerPhotosynthesis, carbon dioxide pairing with water to form a simple sugar and
oxygen
3 students measured the mass of a product of combustion. They recorded
measurements of 5.14g 5.16g and 5.17g if the known mass of the product is 5.30g how
would you describe the students measurements? - correct answerPrecise
What is the energy pyramid? - correct answerProducers>primary
consumers>secondary consumers>decomposers
Which is not a step in the water cycle? - correct answerNitrification(nitrogen cycle)
Steps
Condensation(gas to liquid)
Prep with Correct Verified Answers
Which organelle is responsible for protein synthesis? - correct answerRibosome
Why is yeast used to make bread rise? - correct answerYeast carries out fermentation,
producing ethanol and carbon dioxide
How is mitosis different from meiosis? - correct answerMeiosis creates sex cells with
half the # of chromosomes of the parent cell where as mitosis creates cells that are
exact copies of each other, down to the number of chromosomes
What can be altered? - correct answerDNA
What is single stranded? - correct answerRNA
What contains uracil? - correct answerRNA
What codes for proteins? - correct answerDNA
Imagine that two parents both carry the recessive gene for cystic fibrosis. Any
homozygous recessive offspring will manifest the disease. What percentage of the
offspring is predicted to be carriers but not manifest the disease? - correct answer50
percent
A cell is in a solution in which the concentration of solutes is higher inside the cell than
outside the cell. What would you expect to happen to the cell? - correct answerIt will
swell and probably burst/hypotonic situation
What is the purpose of phloem tissue in plant stems? - correct answerIt conducts food
throughout the plant, it is the system of narrow tubes that transports sugars and other
nutrients
Physical factors such as temperature and pH can alter enzyme activity because they
have an effect on the enzyme's - correct answerShape, the shape of an enzyme
controls it's fit with its substrate.
Which part of a plants reproductive system is of a different gender than others? - correct
answerStamen (male reproductive organ)
What kind of symbiosis exists between a pneumonia bacterium and a human? - correct
answerParasitism, one organism benefits off another
, The scientific name for a house cat is Felis catus. This indicates the house cats what? -
correct answerGenus; species
Kingdom/animalia
Phylum/Chordata
Class/mammalia
Order/carnivora
Family/felidae
Genus/ Felis
Species/catus
Beeswax is an example of what kind of molecule? - correct answerLipid, waxes oils and
fats are lipids
What takes place in a lysosome? - correct answerFood is digested, the lysosome
contains digestive enzymes. The job of a lysosome is to digest food for cells and break
down cells waste products
Which organism reproduces via binary fission? - correct answerSalmonella
In which phase of cell division do the chromosomes replicate? - correct
answerInterphase-active phase of a cells reproductive life, the cell produces nucleic
acids and proteins and doubled its # of chromosomes
In a strand of DNA, you would expect to see adenine paired with? - correct
answerThymine/adenine
Cytosine/guanine
Hemophilia is a sex linked trait carried on the X chromosome. In an example of a male
with hemophilia and a female carrier, what ratio of the offspring is predicted to have the
disease? - correct answer1 female: 0 male
What is represented by this formula 6CO2+6H2O=>C6H12O6+6O2 - correct
answerPhotosynthesis, carbon dioxide pairing with water to form a simple sugar and
oxygen
3 students measured the mass of a product of combustion. They recorded
measurements of 5.14g 5.16g and 5.17g if the known mass of the product is 5.30g how
would you describe the students measurements? - correct answerPrecise
What is the energy pyramid? - correct answerProducers>primary
consumers>secondary consumers>decomposers
Which is not a step in the water cycle? - correct answerNitrification(nitrogen cycle)
Steps
Condensation(gas to liquid)
