Q: During protein synthesis, which sequence correctly describes the flow of genetic information?

$$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$$

Question 1

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

Accepted Answer

It defines the cell boundary and regulates the movement of substances between intracellular and extracellular fluids.

Question 2

The fluid mosaic model of the plasma membrane is characterized by which structural feature?

Accepted Answer

A phospholipid bilayer with embedded proteins that move laterally.

Question 3

Which component of the plasma membrane is primarily responsible for cell-to-cell recognition?

Accepted Answer

Glycolipids

Question 4

A mutation causes a cell to lose its ability to synthesize ribosomal RNA (rRNA). Which organelle is most likely affected?

Accepted Answer

Nucleolus

Question 5

During protein synthesis, which sequence correctly describes the flow of genetic information?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$$

Question 6

Which organelle is responsible for packaging proteins and sending them to their proper destination within or outside the cell?

Accepted Answer

Golgi apparatus

Question 7

A patient is diagnosed with a disorder affecting the detoxification of drugs and alcohol in liver cells. Which organelle is most likely malfunctioning?

Accepted Answer

Smooth endoplasmic reticulum

Question 8

Which of the following best explains why red blood cells lack most organelles, including a nucleus?

Accepted Answer

To increase their surface area for gas exchange and flexibility for movement through capillaries.

Question 9

Which cytoskeletal element is primarily responsible for maintaining and changing cell shape through contraction?

Accepted Answer

Microfilaments (actin)

Question 10

A cell is observed to have an abundance of mitochondria. What is the most likely function of this cell?

Accepted Answer

Energy production through ATP synthesis

Question 11

Which organelle contains digestive enzymes and is involved in apoptosis (programmed cell death)?

Accepted Answer

Lysosome

Question 12

A cell is found to have many microvilli on its surface. What is the primary function of these structures?

Accepted Answer

Increase surface area for absorption

Question 13

Which of the following is TRUE regarding gene expression and cell differentiation?

Accepted Answer

Cells differentiate by expressing specific genes that produce proteins unique to their function.

Question 14

Which organelle is directly involved in the neutralization of free radicals and removal of toxic waste?

Accepted Answer

Peroxisome

Question 15

During cell division, which structure organizes the mitotic spindle?

Accepted Answer

Centrosome and centrioles

Question 16

Which of the following is the only human cell type that possesses a flagellum?

Accepted Answer

Sperm cell

Question 17

A cell is observed to have a large number of rough endoplasmic reticulum. What is its most likely function?

Accepted Answer

Protein synthesis for export or membrane insertion

Question 18

If a cell's plasma membrane lost its cholesterol content, which property would be most affected?

Accepted Answer

Fluidity of the membrane

Question 19

Which of the following best describes the role of integral proteins in the plasma membrane?

Accepted Answer

They are embedded within the lipid bilayer and function as channels, carriers, or receptors.

Question 20

A cell is found to have many melanin inclusions. What is the most likely function of this cell?

Accepted Answer

Protection against ultraviolet radiation

The Cell: Structure and Function in Anatomy & Physiology

Guida di studio - Domande di pratica

Study guide - Flashcard