Hesi A2 Biology Practice Questions and
answers 2025/2025 latest update
Which organelle is responsible for protein synthesis? - answerRibosome
Why is yeast used to make bread rise? - answerYeast carries out fermentation, producing ethanol and
carbon dioxide
How is mitosis different from meiosis? - 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? - answerDNA
What is single stranded? - answerRNA
What contains uracil? - answerRNA
What codes for proteins? - 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? - 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? - answerIt will swell and probably burst/hypotonic
situation
What is the purpose of phloem tissue in plant stems? - 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 - 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? - answerStamen (male
reproductive organ)
What kind of symbiosis exists between a pneumonia bacterium and a human? - answerParasitism, one
organism benefits off another
The scientific name for a house cat is Felis catus. This indicates the house cats what? - 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? - answerLipid, waxes oils and fats are lipids
What takes place in a lysosome? - 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? - answerSalmonella
In which phase of cell division do the chromosomes replicate? - 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? - 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? - answer1 female: 0
male
What is represented by this formula 6CO2+6H2O=>C6H12O6+6O2 - 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? - answerPrecise
What is the energy pyramid? - answerProducers>primary consumers>secondary
consumers>decomposers
Which is not a step in the water cycle? - answerNitrification(nitrogen cycle)
Steps
Condensation(gas to liquid)
Transpiration(loss of water through a plants stomata)
Absorption(intake of water from the water table by plant roots)
Why do we perceive chlorophyll as green? - answerIt fails to absorb green light
Absorbs red and blue reflects green
Why are bacteria and blue green algae often classified together? - answerBoth are prokaryotes have no
true nucleus
Which molecule contains glucose? - answerCarbohydrates
Simple carbohydrates are simple sugars, complex carbohydrates are simple sugars linked with covalent
bonds
answers 2025/2025 latest update
Which organelle is responsible for protein synthesis? - answerRibosome
Why is yeast used to make bread rise? - answerYeast carries out fermentation, producing ethanol and
carbon dioxide
How is mitosis different from meiosis? - 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? - answerDNA
What is single stranded? - answerRNA
What contains uracil? - answerRNA
What codes for proteins? - 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? - 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? - answerIt will swell and probably burst/hypotonic
situation
What is the purpose of phloem tissue in plant stems? - 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 - 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? - answerStamen (male
reproductive organ)
What kind of symbiosis exists between a pneumonia bacterium and a human? - answerParasitism, one
organism benefits off another
The scientific name for a house cat is Felis catus. This indicates the house cats what? - 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? - answerLipid, waxes oils and fats are lipids
What takes place in a lysosome? - 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? - answerSalmonella
In which phase of cell division do the chromosomes replicate? - 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? - 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? - answer1 female: 0
male
What is represented by this formula 6CO2+6H2O=>C6H12O6+6O2 - 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? - answerPrecise
What is the energy pyramid? - answerProducers>primary consumers>secondary
consumers>decomposers
Which is not a step in the water cycle? - answerNitrification(nitrogen cycle)
Steps
Condensation(gas to liquid)
Transpiration(loss of water through a plants stomata)
Absorption(intake of water from the water table by plant roots)
Why do we perceive chlorophyll as green? - answerIt fails to absorb green light
Absorbs red and blue reflects green
Why are bacteria and blue green algae often classified together? - answerBoth are prokaryotes have no
true nucleus
Which molecule contains glucose? - answerCarbohydrates
Simple carbohydrates are simple sugars, complex carbohydrates are simple sugars linked with covalent
bonds
