9th Grade Biology EOC Practice Test
Questions with All 100% Correct
Answers 2025-2026 Edition.
Which molecule is paired with its correct role in protein synthesis?
-nucleus-forms peptide bonds
-ribosome-carries DNA instructions
-mRNA-joins amino acids
-tRNA-transfers amino acids - Answer tRNA-transfers amino acids
Which cellular process converts solar energy into chemical energy? - Answer photosynthesis
Which best explains why a bacterial cell is classified as a prokaryote?
-the presence of a nucleus
-the absence of a nucleus
-the presence of a cell wall
-the absence of a cell wall - Answer the absence of a nucleus
In certain species of roses, white roses and red roses are incompletely dominant to each other.
When a red rose and a white rose are crossed, a pink rose is produced. What is the probability
of producing a white rose when a red rose is crossed with a pink rose? - Answer 0%
Humans sometimes kill giant tritons in order to collect their attractive spiral shells. If humans kill
most of the giant tritons in a coral reef, the coral population will most likely _________ - Answer
decrease due to an increase in the crown-of-thorns sea star population
In the late 1800s Christiaan Eijkman studied a disease called beriberi which is caused by a
vitamin deficiency. A disease similar to beriberi occurred in chickens that were fed polished rice,
which is a rice that has had the bran layer removed. Chickens that ate unpolished rice did not
get the disease.
Elijkman convinced officials of a prison experiencing an outbreak of the disease to start feeding
the prisoners unpolished rice. The rate of beriberi decreased dramatically. Which procedure
would best convince other scientists who questioned the results? - Answer provide the same
number of prisoners with polished rice as with unpolished rice
, The roots of some plant species have a special coating to help resist rotting in extremely wet
weather. In which environment is it most beneficial for plants to have rot-resistant roots? -
Answer a tropical environment
Which piece of equipment is best for measuring the change in the mass of potato slices after
placing them in different concentrations of salt water? - Answer triple beam balance
How do enzymes function in the body? - Answer they lower the activation energy of
reactions
Which molecules store and transmit genetic material? - Answer nucleic acids
A student notices that the lettuce in a salad wilts soon after salt is added. Wilting most likely
occurs because the lettuce cells ______________ - Answer release water in the presence of
salt
In active transport, carrier proteins_____________ - Answer move substances from a low
concentration to high concentration through the use of energy
An isolated population of termites lives in a forest surrounded by mountains. These termites
feed on dead wood, grasses, and seeds. This food is broken down by a species of microorganism
that lives inside the intestines of the termites. Without the microorganisms, these termites
cannot obtain the nutrients they need to survive. One winter, a virus causes most of these
microorganisms to die. As a result of the microorganism's absence, these termites will most
likely ______________ - Answer decrease to a level near extinction
A researcher is studying the damage that predators cause to the wings of butterflies. Which
tools are best to use to determine the percentage of butterflies with damaged wings?
-triple beam balance and microscope
-hand lens and triple beam balance
-catch net and hands lens
-microscope and graduated cylinder - Answer catch net and hand lens
If 2 people who are both heterozygous for the trait of a bent pinky finger have a child, what is
the percent probability that the child will have straight pinky fingers? - Answer 25%
Questions with All 100% Correct
Answers 2025-2026 Edition.
Which molecule is paired with its correct role in protein synthesis?
-nucleus-forms peptide bonds
-ribosome-carries DNA instructions
-mRNA-joins amino acids
-tRNA-transfers amino acids - Answer tRNA-transfers amino acids
Which cellular process converts solar energy into chemical energy? - Answer photosynthesis
Which best explains why a bacterial cell is classified as a prokaryote?
-the presence of a nucleus
-the absence of a nucleus
-the presence of a cell wall
-the absence of a cell wall - Answer the absence of a nucleus
In certain species of roses, white roses and red roses are incompletely dominant to each other.
When a red rose and a white rose are crossed, a pink rose is produced. What is the probability
of producing a white rose when a red rose is crossed with a pink rose? - Answer 0%
Humans sometimes kill giant tritons in order to collect their attractive spiral shells. If humans kill
most of the giant tritons in a coral reef, the coral population will most likely _________ - Answer
decrease due to an increase in the crown-of-thorns sea star population
In the late 1800s Christiaan Eijkman studied a disease called beriberi which is caused by a
vitamin deficiency. A disease similar to beriberi occurred in chickens that were fed polished rice,
which is a rice that has had the bran layer removed. Chickens that ate unpolished rice did not
get the disease.
Elijkman convinced officials of a prison experiencing an outbreak of the disease to start feeding
the prisoners unpolished rice. The rate of beriberi decreased dramatically. Which procedure
would best convince other scientists who questioned the results? - Answer provide the same
number of prisoners with polished rice as with unpolished rice
, The roots of some plant species have a special coating to help resist rotting in extremely wet
weather. In which environment is it most beneficial for plants to have rot-resistant roots? -
Answer a tropical environment
Which piece of equipment is best for measuring the change in the mass of potato slices after
placing them in different concentrations of salt water? - Answer triple beam balance
How do enzymes function in the body? - Answer they lower the activation energy of
reactions
Which molecules store and transmit genetic material? - Answer nucleic acids
A student notices that the lettuce in a salad wilts soon after salt is added. Wilting most likely
occurs because the lettuce cells ______________ - Answer release water in the presence of
salt
In active transport, carrier proteins_____________ - Answer move substances from a low
concentration to high concentration through the use of energy
An isolated population of termites lives in a forest surrounded by mountains. These termites
feed on dead wood, grasses, and seeds. This food is broken down by a species of microorganism
that lives inside the intestines of the termites. Without the microorganisms, these termites
cannot obtain the nutrients they need to survive. One winter, a virus causes most of these
microorganisms to die. As a result of the microorganism's absence, these termites will most
likely ______________ - Answer decrease to a level near extinction
A researcher is studying the damage that predators cause to the wings of butterflies. Which
tools are best to use to determine the percentage of butterflies with damaged wings?
-triple beam balance and microscope
-hand lens and triple beam balance
-catch net and hands lens
-microscope and graduated cylinder - Answer catch net and hand lens
If 2 people who are both heterozygous for the trait of a bent pinky finger have a child, what is
the percent probability that the child will have straight pinky fingers? - Answer 25%
