Hesi A2 Biology Exam 2026|2027 Questions
and Answers
Which is not a step in the water cycle? - ANSWER-Nitrification(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)
Which gives the order of four taxonomic categories from least to most specific? -
ANSWER-Kingdom phylum class order family genus species
Why is yeast used to make bread rise? - ANSWER-Yeast carries out fermentation,
producing ethanol and carbon dioxide
How is mitosis different from meiosis? - ANSWER-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? - ANSWER-DNA
What is single stranded? - ANSWER-RNA
What contains uracil? - ANSWER-RNA
What codes for proteins? - ANSWER-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? - ANSWER-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? - ANSWER-It
will swell and probably burst/hypotonic situation
What is the purpose of phloem tissue in plant stems? - ANSWER-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 - ANSWER-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? -
ANSWER-Stamen (male reproductive organ)
What kind of symbiosis exists between a pneumonia bacterium and a human? -
ANSWER-Parasitism, one organism benefits off another
The scientific name for a house cat is Felis catus. This indicates the house cats
what? - ANSWER-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? - ANSWER-Lipid, waxes oils and
fats are lipids
What takes place in a lysosome? - ANSWER-Food 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? - ANSWER-Salmonella
In which phase of cell division do the chromosomes replicate? - ANSWER-
Interphase-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? - ANSWER-
Thymine/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? - ANSWER-1 female: 0 male
Which organelle is responsible for protein synthesis? - ANSWER-Ribosome
What is represented by this formula 6CO2+6H2O=>C6H12O6+6O2 - ANSWER-
Photosynthesis, 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? - ANSWER-Precise
and Answers
Which is not a step in the water cycle? - ANSWER-Nitrification(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)
Which gives the order of four taxonomic categories from least to most specific? -
ANSWER-Kingdom phylum class order family genus species
Why is yeast used to make bread rise? - ANSWER-Yeast carries out fermentation,
producing ethanol and carbon dioxide
How is mitosis different from meiosis? - ANSWER-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? - ANSWER-DNA
What is single stranded? - ANSWER-RNA
What contains uracil? - ANSWER-RNA
What codes for proteins? - ANSWER-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? - ANSWER-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? - ANSWER-It
will swell and probably burst/hypotonic situation
What is the purpose of phloem tissue in plant stems? - ANSWER-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 - ANSWER-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? -
ANSWER-Stamen (male reproductive organ)
What kind of symbiosis exists between a pneumonia bacterium and a human? -
ANSWER-Parasitism, one organism benefits off another
The scientific name for a house cat is Felis catus. This indicates the house cats
what? - ANSWER-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? - ANSWER-Lipid, waxes oils and
fats are lipids
What takes place in a lysosome? - ANSWER-Food 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? - ANSWER-Salmonella
In which phase of cell division do the chromosomes replicate? - ANSWER-
Interphase-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? - ANSWER-
Thymine/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? - ANSWER-1 female: 0 male
Which organelle is responsible for protein synthesis? - ANSWER-Ribosome
What is represented by this formula 6CO2+6H2O=>C6H12O6+6O2 - ANSWER-
Photosynthesis, 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? - ANSWER-Precise
