Question 1

Which of the following best describes the function of the plasma membrane in a typical human cell?

Accepted Answer

It controls what enters and leaves the cell, acting as a selectively permeable barrier.

Question 2

A patient is given an intravenous solution that is hypertonic relative to their red blood cells. What is the most likely outcome for the red blood cells?

Accepted Answer

They will shrink as water leaves the cells.

Question 3

Which organelle is primarily responsible for modifying, packaging, and secreting proteins in the cell?

Accepted Answer

Golgi apparatus

Question 4

A scientist observes a tissue sample under a microscope and notes that the cells are specialized for rapid internal communication by transmitting electrical impulses. Which tissue type is being observed?

Accepted Answer

Nervous tissue

Question 5

Which of the following best explains why water is considered the 'universal solvent' in biological systems?

Accepted Answer

Water is polar, allowing it to dissolve many ionic and polar substances.

Question 6

Which of the following is a correct example of a negative feedback mechanism in the human body?

Accepted Answer

Sweating to reduce body temperature when overheated.

Question 7

A cell is placed in a solution and water moves into the cell, causing it to swell. Which equation best represents the osmotic movement, and what type of solution is this?

Accepted Answer

Water moves from low to high solute concentration; the solution is hypotonic.

Question 8

Which of the following statements about DNA and RNA is correct?

Accepted Answer

RNA is single-stranded, contains ribose, and uses uracil instead of thymine.

Question 9

A patient has a genetic disorder affecting the function of sodium-potassium pumps in their cell membranes. Which type of membrane transport is directly impaired?

Accepted Answer

Active transport

Question 10

Which of the following best describes the relationship between structure and function at the organ system level?

Accepted Answer

Organ systems consist of organs working together to accomplish a common purpose.

Question 11

Which of the following is a function of the skeletal system?

Accepted Answer

Blood cell formation within bones

Question 12

A researcher is studying a molecule with the following structure: four interlocking rings. This molecule is most likely:

Accepted Answer

A steroid

Question 13

Which of the following best describes the process of transcription?

Accepted Answer

The copying of DNA information into mRNA in the nucleus

Question 14

A cell is observed to have an abundance of rough endoplasmic reticulum. Which function is this cell most likely specialized for?

Accepted Answer

Protein synthesis and transport

Question 15

Which of the following best explains why CO$$_2 is $$considered an inorganic compound, despite containing carbon?

Accepted Answer

CO$$_2 is a $$small molecule and does not contain hydrogen.

Question 16

Which of the following is the correct sequence of events during mitosis?

Accepted Answer

Prophase → Metaphase → Anaphase → Telophase

Question 17

A solution has a pH of 4. Which of the following statements is true regarding this solution?

Accepted Answer

It is acidic and has a high concentration of H$$^+$$ ions.

Question 18

Which of the following best describes the role of buffers in the human body?

Accepted Answer

They prevent dramatic changes in pH by absorbing or releasing H$$^+$$ ions.

Question 19

A muscle cell is observed to have a high number of mitochondria. What is the most likely reason for this observation?

Accepted Answer

The cell requires large amounts of ATP for contraction.

Question 20

Which of the following best describes the function of tRNA during protein synthesis?

Accepted Answer

It brings amino acids to the ribosome for assembly into proteins.

ANP Study Guide: The Human Body, Chemistry of Life, and Cells

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