HESI A2 BIOLOGY EXAM 2025 WITH
ACCURATE SOLUTIONS
Which organelle is responsible for protein synthesis? - correct answers ✔✔Ribosome
Why is yeast used to make bread rise? - correct answers ✔✔Yeast carries out fermentation,
producing ethanol and carbon dioxide
How is mitosis different from meiosis? - correct answers ✔✔Meiosis 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 answers ✔✔DNA
What is single stranded? - correct answers ✔✔RNA
What contains uracil? - correct answers ✔✔RNA
What codes for proteins? - correct answers ✔✔DNA
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 answers ✔✔50 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 answers ✔✔It will swell and
probably burst/hypotonic situation
What is the purpose of phloem tissue in plant stems? - correct answers ✔✔It 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 answers ✔✔Shape, 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
answers ✔✔Stamen (male reproductive organ)
What kind of symbiosis exists between a pneumonia bacterium and a human? - correct answers
✔✔Parasitism, one organism benefits off another
The scientific name for a house cat is Felis catus. This indicates the house cats what? - correct
answers ✔✔Genus; 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 answers ✔✔Lipid, waxes oils and
fats are lipids
ACCURATE SOLUTIONS
Which organelle is responsible for protein synthesis? - correct answers ✔✔Ribosome
Why is yeast used to make bread rise? - correct answers ✔✔Yeast carries out fermentation,
producing ethanol and carbon dioxide
How is mitosis different from meiosis? - correct answers ✔✔Meiosis 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 answers ✔✔DNA
What is single stranded? - correct answers ✔✔RNA
What contains uracil? - correct answers ✔✔RNA
What codes for proteins? - correct answers ✔✔DNA
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 answers ✔✔50 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 answers ✔✔It will swell and
probably burst/hypotonic situation
What is the purpose of phloem tissue in plant stems? - correct answers ✔✔It 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 answers ✔✔Shape, 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
answers ✔✔Stamen (male reproductive organ)
What kind of symbiosis exists between a pneumonia bacterium and a human? - correct answers
✔✔Parasitism, one organism benefits off another
The scientific name for a house cat is Felis catus. This indicates the house cats what? - correct
answers ✔✔Genus; 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 answers ✔✔Lipid, waxes oils and
fats are lipids
