Hesi A2 Biology Practice Questions With Accurate Answers
100% Guarantee pass 2026-2027
1. Describe the inheritance pattern of hemophilia in the context of a male with
hemophilia and a female carrier.
Hemophilia is a Y-linked disorder, affecting only males and passed
from father to son.
Hemophilia is a mitochondrial disorder inherited from the mother only.
Hemophilia is an autosomal dominant disorder, where both parents
must have the disease for it to be passed on.
Hemophilia is an X-linked recessive disorder, meaning that the male
inherits the affected X chromosome from his mother, while the
female carrier has one affected X chromosome and one normal X
chromosome.
2. Which type of plant is classified as a gymnosperm?
Rose bush
Sunflower
Pine tree
Oak tree
3. Describe the significance of the S phase in the cell cycle.
The S phase is crucial because it is when DNA is replicated,
ensuring that each daughter cell receives an identical set of
chromosomes.
The S phase is when the cell prepares for protein synthesis.
The S phase is when the cell undergoes apoptosis.
, The S phase is important for cell division to occur.
4. Describe the significance of the reactants and products in the equation
6CO2 + 6H2O => C6H12O6 + 6O2.
The reactants are oxygen and water, which are converted into
glucose and carbon dioxide.
The reactants are glucose and oxygen, which are converted into
carbon dioxide and water during cellular respiration.
The reactants are carbon dioxide and water, which are converted
into glucose and oxygen during photosynthesis.
The reactants are glucose and carbon dioxide, which are converted
into water and energy.
5. Describe how changes in temperature can impact the activity of enzymes.
Higher temperatures always increase enzyme activity.
Changes in temperature can alter the shape of the enzyme,
affecting its ability to bind to substrates.
Temperature only affects the substrate, not the enzyme.
Temperature changes have no effect on enzyme activity.
6. If the energy efficiency of a coyote is lower than that of a cow, what
implications does this have for the population dynamics of these species in an
ecosystem?
The coyote population may be smaller due to lower energy
availability from its food sources.
The cow population will be larger because it consumes more energy
efficiently.
, Coyotes will outcompete cows for resources due to their higher
position in the food chain.
Both populations will remain stable regardless of energy efficiency
differences.
7. What is necessary for active transport through a membrane to take place?
Sodium
Oxygen
Glucose
ATP
8. Describe the role of ribosomes in the process of protein synthesis.
Ribosomes translate messenger RNA into polypeptide chains,
forming proteins.
Ribosomes store genetic information for protein synthesis.
Ribosomes break down proteins into amino acids.
Ribosomes transport proteins to different parts of the cell.
9. Describe the significance of uracil in RNA compared to thymine in DNA.
Uracil and thymine are interchangeable in both RNA and DNA.
Uracil is found in DNA and pairs with cytosine, while thymine is in RNA.
Uracil is a nitrogenous base found in RNA, whereas thymine is found
in DNA, and they both pair with adenine.
Uracil is a sugar component of RNA, while thymine is a base in DNA.
, 10. Describe how the absorption of nitrates by green plants contributes to their
growth and development.
The absorption of nitrates allows plants to produce essential amino
acids, which are necessary for protein synthesis and overall growth.
Nitrates are primarily used for respiration in plants.
Nitrates provide energy directly to plants for photosynthesis.
Nitrates help in the formation of plant cell walls.
11. What organelle is typically found in animal cells but absent in plant cells?
Vacuoles
Centrioles
Chloroplasts
Cell wall
12. What does the energy pyramid illustrate in an ecosystem?
The types of organisms in a food web.
The distribution of energy among trophic levels.
The process of photosynthesis.
The structure of a cell.
13. What is the main event that occurs during anaphase in mitosis?
Cytoplasm divides into two daughter cells.
Chromosomes align at the cell's equator.
Chromatids are pulled apart to opposite poles of the cell.
Nuclear envelope begins to reform.
100% Guarantee pass 2026-2027
1. Describe the inheritance pattern of hemophilia in the context of a male with
hemophilia and a female carrier.
Hemophilia is a Y-linked disorder, affecting only males and passed
from father to son.
Hemophilia is a mitochondrial disorder inherited from the mother only.
Hemophilia is an autosomal dominant disorder, where both parents
must have the disease for it to be passed on.
Hemophilia is an X-linked recessive disorder, meaning that the male
inherits the affected X chromosome from his mother, while the
female carrier has one affected X chromosome and one normal X
chromosome.
2. Which type of plant is classified as a gymnosperm?
Rose bush
Sunflower
Pine tree
Oak tree
3. Describe the significance of the S phase in the cell cycle.
The S phase is crucial because it is when DNA is replicated,
ensuring that each daughter cell receives an identical set of
chromosomes.
The S phase is when the cell prepares for protein synthesis.
The S phase is when the cell undergoes apoptosis.
, The S phase is important for cell division to occur.
4. Describe the significance of the reactants and products in the equation
6CO2 + 6H2O => C6H12O6 + 6O2.
The reactants are oxygen and water, which are converted into
glucose and carbon dioxide.
The reactants are glucose and oxygen, which are converted into
carbon dioxide and water during cellular respiration.
The reactants are carbon dioxide and water, which are converted
into glucose and oxygen during photosynthesis.
The reactants are glucose and carbon dioxide, which are converted
into water and energy.
5. Describe how changes in temperature can impact the activity of enzymes.
Higher temperatures always increase enzyme activity.
Changes in temperature can alter the shape of the enzyme,
affecting its ability to bind to substrates.
Temperature only affects the substrate, not the enzyme.
Temperature changes have no effect on enzyme activity.
6. If the energy efficiency of a coyote is lower than that of a cow, what
implications does this have for the population dynamics of these species in an
ecosystem?
The coyote population may be smaller due to lower energy
availability from its food sources.
The cow population will be larger because it consumes more energy
efficiently.
, Coyotes will outcompete cows for resources due to their higher
position in the food chain.
Both populations will remain stable regardless of energy efficiency
differences.
7. What is necessary for active transport through a membrane to take place?
Sodium
Oxygen
Glucose
ATP
8. Describe the role of ribosomes in the process of protein synthesis.
Ribosomes translate messenger RNA into polypeptide chains,
forming proteins.
Ribosomes store genetic information for protein synthesis.
Ribosomes break down proteins into amino acids.
Ribosomes transport proteins to different parts of the cell.
9. Describe the significance of uracil in RNA compared to thymine in DNA.
Uracil and thymine are interchangeable in both RNA and DNA.
Uracil is found in DNA and pairs with cytosine, while thymine is in RNA.
Uracil is a nitrogenous base found in RNA, whereas thymine is found
in DNA, and they both pair with adenine.
Uracil is a sugar component of RNA, while thymine is a base in DNA.
, 10. Describe how the absorption of nitrates by green plants contributes to their
growth and development.
The absorption of nitrates allows plants to produce essential amino
acids, which are necessary for protein synthesis and overall growth.
Nitrates are primarily used for respiration in plants.
Nitrates provide energy directly to plants for photosynthesis.
Nitrates help in the formation of plant cell walls.
11. What organelle is typically found in animal cells but absent in plant cells?
Vacuoles
Centrioles
Chloroplasts
Cell wall
12. What does the energy pyramid illustrate in an ecosystem?
The types of organisms in a food web.
The distribution of energy among trophic levels.
The process of photosynthesis.
The structure of a cell.
13. What is the main event that occurs during anaphase in mitosis?
Cytoplasm divides into two daughter cells.
Chromosomes align at the cell's equator.
Chromatids are pulled apart to opposite poles of the cell.
Nuclear envelope begins to reform.
