Free FTCE Biology 6-12 Practice Questions

Question 1

A student tests whether fertilizer concentration affects plant growth. She lines up four identical potted seedlings on a windowsill, gives each a different fertilizer concentration, and measures their heights after three weeks. The seedling closest to the window received the highest concentration and grew the tallest. Which factor provides the MOST likely alternative explanation for her results?

Accepted Answer

Light intensity varied along the row and was not controlled

Answer

The seedlings were measured by height rather than by dry mass

Answer

Three weeks is a short period for growth differences to appear

Answer

The seedlings were not weighed before the experiment began

Question 2

A student examining a specimen switches from the 10x objective to the 40x objective while using a 15x ocular lens. Which statement BEST describes the result of this change?

Accepted Answer

Total magnification becomes 600x, and the field of view becomes smaller

Answer

Total magnification becomes 600x, and the field of view becomes larger

Answer

Total magnification becomes 55x, and the field of view becomes smaller

Answer

Total magnification becomes 55x, and the field of view remains unchanged

Question 3

A student measures catalase activity at five temperatures and records the following results: 10 degrees C, 8 bubbles per minute; 25 degrees C, 22 bubbles per minute; 37 degrees C, 45 bubbles per minute; 50 degrees C, 12 bubbles per minute; 70 degrees C, 0 bubbles per minute. Which conclusion is BEST supported by these data?

Accepted Answer

The enzyme's optimum is near 37 degrees C, and it denatures above it

Answer

Enzyme activity increases in direct proportion to temperature

Answer

Cooling the 70 degrees C sample to 37 degrees C would restore full activity

Answer

The low activity at 10 degrees C shows the enzyme was permanently destroyed

Question 4

A student writes that the cell theory is 'only a theory' and will become a scientific law once it has been proven. Which statement BEST corrects this student's reasoning?

Accepted Answer

Theories explain, laws describe, and one never becomes the other

Answer

Laws apply to physical systems, while theories apply to living systems

Answer

A theory is promoted to a law once enough supporting evidence accumulates

Answer

Cell theory is still a theory because parts of it remain untested

Question 5

Students have cultured bacteria from classroom surfaces on sealed nutrient agar plates. At the conclusion of the activity, the teacher should direct students to:

Accepted Answer

sterilize the sealed plates by autoclaving or disinfecting them before disposal

Answer

open the plates to examine colony morphology before discarding them

Answer

place the sealed plates directly into the classroom wastebasket

Answer

refrigerate the sealed plates so the colonies can be observed the following week

Question 6

A plant is supplied with water containing the heavy oxygen isotope O-18 and with carbon dioxide containing only ordinary oxygen. In which molecule will O-18 FIRST appear?

Accepted Answer

The oxygen gas released from the leaf

Answer

The glucose formed by the Calvin cycle

Answer

The ATP produced during the light reactions

Answer

The carbon dioxide given off during respiration

Question 7

During intense exercise, muscle cells rely on lactic acid fermentation. What is the PRIMARY function of this pathway in those cells?

Accepted Answer

Regenerating NAD+ so that glycolysis can continue

Answer

Producing large amounts of ATP in the absence of oxygen

Answer

Delivering electrons to oxygen at the inner mitochondrial membrane

Answer

Converting lactic acid into carbon dioxide and water

Question 8

A hiker bitten by a venomous snake is treated with antivenom, a preparation of antibodies produced in horses. The protection this provides is BEST classified as:

Accepted Answer

artificial passive immunity, because ready-made antibodies were supplied

Answer

artificial active immunity, because the antibodies were introduced by injection

Answer

natural passive immunity, because the antibodies were made in another organism

Answer

artificial active immunity, because memory cells will now recognize the venom

Question 9

A plant cell is placed in a concentrated sucrose solution. Which outcome is expected?

Accepted Answer

Water leaves the cell, and the plasma membrane pulls away from the cell wall

Answer

Water enters the cell, and the central vacuole expands until the cell is turgid

Answer

Sucrose moves into the cell by osmosis until concentrations are equal

Answer

Water leaves the cell, and the rigid cell wall collapses, bursting the cell

Question 10

Red-green color blindness is an X-linked recessive trait. A woman who is a carrier has children with a man who has normal color vision. What is the probability that their next child will be a color-blind son?

Accepted Answer

1 in 4

Answer

1 in 8

Answer

1 in 2

Answer

3 in 4

Free FTCE Biology 6-12 Practice Questions

Domain 1: Knowledge of the investigative processes of science 18% of exam

Question 1

Question 2

Question 3

Question 4

Domain 2: Knowledge of the interactions between science, technology, and society 4% of exam

Question 5

Domain 3: Knowledge of the chemical processes of living things 14% of exam

Question 6

Question 7

Question 8

Domain 4: Knowledge of the interactions between cell structure and cell function 7% of exam

Question 9

Domain 5: Knowledge of genetic principles, processes, and applications 11% of exam

Question 10

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