Question 1

Which of the following best describes the principle of complementarity of structure and function in cells?

Accepted Answer

The structure of a cell determines its function, and its function can alter its structure.

Question 2

A red blood cell is placed in a hypertonic solution. What will happen to the cell and why?

Accepted Answer

It will shrink because water moves out of the cell by osmosis.

Question 3

Which organelle is responsible for ATP production and contains its own DNA and RNA?

Accepted Answer

Mitochondrion

Question 4

A patient has a genetic defect that prevents the formation of microtubules. Which cellular process would be most directly affected?

Accepted Answer

Cell division (mitotic spindle formation)

Question 5

Which of the following best explains why the Na+/K+ pump is considered an example of primary active transport?

Accepted Answer

It directly uses ATP to move ions against their concentration gradients.

Question 6

Which process is illustrated by the movement of water through aquaporins in the plasma membrane?

Accepted Answer

Osmosis

Question 7

A cell is observed to engulf a bacterium by extending its plasma membrane around the particle. Which process is this?

Accepted Answer

Phagocytosis

Question 8

Which of the following is a function of the Golgi apparatus?

Accepted Answer

Modifying, concentrating, and packaging proteins for secretion

Question 9

Which of the following best describes the role of tRNA during translation?

Accepted Answer

It brings specific amino acids to the ribosome based on the mRNA codon sequence.

Question 10

A mutation prevents the formation of tight junctions between epithelial cells. Which of the following is a likely consequence?

Accepted Answer

Increased permeability between cells, allowing molecules to pass freely.

Question 11

Which of the following equations correctly represents the calculation of osmolarity ($$O) $$for a solution containing $$n$$ moles of solute in $$V$$ liters of solution?

Accepted Answer

$$O = \frac{n}{V}$$

Question 12

Which of the following best describes the function of peroxisomes?

Accepted Answer

They detoxify harmful substances and neutralize free radicals.

Question 13

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 14

Which of the following is true regarding the resting membrane potential of a typical cell?

Accepted Answer

It is established mainly by the differential permeability of the membrane to K+ and Na+.

Question 15

A scientist observes that a cell is actively secreting large amounts of protein. Which organelles would you expect to be especially prominent in this cell?

Accepted Answer

Rough endoplasmic reticulum and Golgi apparatus

Question 16

Which of the following best describes the process of receptor-mediated endocytosis?

Accepted Answer

Specific extracellular molecules bind to receptors, triggering vesicle formation.

Question 17

Which of the following statements about the genetic code is correct?

Accepted Answer

Each codon consists of three nucleotides and specifies one amino acid.

Question 18

Which of the following is a real-life example of secondary active transport in the human body?

Accepted Answer

The Na+-glucose symport in the intestinal epithelium

Question 19

Which cytoskeletal element is primarily responsible for resisting pulling forces on the cell and is composed of tough, insoluble protein fibers?

Accepted Answer

Intermediate filaments

Question 20

A cell is exposed to a toxin that inhibits the function of ribosomes. Which process will be directly affected?

Accepted Answer

Protein synthesis

The Cell: Structure, Function, and Processes

Guida di studio - Domande di pratica

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