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HESI A2 BIOLOGY PRACTICE EXAM
2026 QUESTIONS AND CORRECT
DETAILED ANSWERS | RATED A+ |
NEW AND REVISED
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
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
What is the energy pyramid? - ANSWER- Producers>primary
consumers>secondary consumers>decomposers
Which is not a step in the water cycle? - ANSWER-
Nitrification(nitrogen cycle)
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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? - ANSWER- It fails to
absorb green light
Absorbs red and blue reflects green
Why are bacteria and blue green algae often classified together? -
ANSWER- Both are prokaryotes have no true nucleus
Which molecule contains glucose? - ANSWER- Carbohydrates
Simple carbohydrates are simple sugars, complex carbohydrates are
simple sugars linked with covalent bonds
What conducts water up through the stem of a plant? - ANSWER-
Xylem
What are the female parts of a plant? - ANSWER- Pistil (female
reproductive organ)
Stigma (top part of pistil)
Style (slender stalk below the stigma)
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Vascular plants whose seeds have no protective covering? - ANSWER-
Gymnosperms
Organisms that make their own food through photosynthesis example
blue-green algae - ANSWER- Autotrophs
Infectious organisms that spread disease - ANSWER- Pathogens
Which organelle is the site of energy production? - ANSWER-
Mitochondrion
What happens to glucose during glycolysis? - ANSWER- It splits into
molecules of pyruvic acid
What process do cells in the tip of a plants roots undergo to increase in
number? - ANSWER- Mitosis
How do RNA and DNA derive their names? - ANSWER- From the
sugar each contains
If a disease is carried on the dominant allele, only the aa combination of
recessive genes represents a disease free offspring. - ANSWER- 1 out of
4 or 25% are predicted to be disease free
If bacteria are placed in a strong solution of salt water, they will shrink
as water moves out of the bacteria. What is this process called? -
HESI A2 BIOLOGY PRACTICE EXAM
2026 QUESTIONS AND CORRECT
DETAILED ANSWERS | RATED A+ |
NEW AND REVISED
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
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
What is the energy pyramid? - ANSWER- Producers>primary
consumers>secondary consumers>decomposers
Which is not a step in the water cycle? - ANSWER-
Nitrification(nitrogen cycle)
,2|Page
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? - ANSWER- It fails to
absorb green light
Absorbs red and blue reflects green
Why are bacteria and blue green algae often classified together? -
ANSWER- Both are prokaryotes have no true nucleus
Which molecule contains glucose? - ANSWER- Carbohydrates
Simple carbohydrates are simple sugars, complex carbohydrates are
simple sugars linked with covalent bonds
What conducts water up through the stem of a plant? - ANSWER-
Xylem
What are the female parts of a plant? - ANSWER- Pistil (female
reproductive organ)
Stigma (top part of pistil)
Style (slender stalk below the stigma)
, 3|Page
Vascular plants whose seeds have no protective covering? - ANSWER-
Gymnosperms
Organisms that make their own food through photosynthesis example
blue-green algae - ANSWER- Autotrophs
Infectious organisms that spread disease - ANSWER- Pathogens
Which organelle is the site of energy production? - ANSWER-
Mitochondrion
What happens to glucose during glycolysis? - ANSWER- It splits into
molecules of pyruvic acid
What process do cells in the tip of a plants roots undergo to increase in
number? - ANSWER- Mitosis
How do RNA and DNA derive their names? - ANSWER- From the
sugar each contains
If a disease is carried on the dominant allele, only the aa combination of
recessive genes represents a disease free offspring. - ANSWER- 1 out of
4 or 25% are predicted to be disease free
If bacteria are placed in a strong solution of salt water, they will shrink
as water moves out of the bacteria. What is this process called? -
