Biology ยท Science General

Cell Biology and Structure

3,221 Questions

Cell biology focuses on the structure and function of cellular organelles. Key topics include cellular respiration, DNA inheritance, and energy production. These fundamental biology concepts are crucial for medical entrance and state service examinations.

Cell organelles functionsCellular respiration sitesDNA and ribosomesAnimal cell structurePlant cell components

Cell Biology and Structure Questions

Multiple choice

What is the term for the process by which a cell changes its behavior in response to a signal from another cell?

  1. Cell Division

  2. Cell Differentiation

  3. Cell Migration

  4. Cell Signaling
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cell signaling is the process by which a cell changes its behavior in response to a signal from another cell.

Multiple choice

Which of the following is a hallmark of cancer cells?

  1. Uncontrolled cell growth

  2. Loss of contact inhibition

  3. Increased angiogenesis

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cancer cells exhibit a number of hallmarks, including uncontrolled cell growth, loss of contact inhibition, increased angiogenesis, and evasion of apoptosis.

Multiple choice

What is the process by which cancer cells metastasize?

  1. Invasion

  2. Angiogenesis

  3. Intravasation

  4. Extravasation
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Metastasis is the process by which cancer cells spread from the primary tumor to other parts of the body. This process involves invasion, angiogenesis, intravasation, and extravasation.

Multiple choice

Which of the following is a type of cancer stem cell?

  1. CD133+ cancer stem cells

  2. CD44+/CD24- cancer stem cells

  3. ALDH+ cancer stem cells

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cancer stem cells are a small population of cells within a tumor that have the ability to self-renew and differentiate into other types of cancer cells. There are a number of different types of cancer stem cells, including CD133+ cancer stem cells, CD44+/CD24- cancer stem cells, and ALDH+ cancer stem cells.

Multiple choice

What is the term for the process by which a lost or damaged body part is restored to its original state?

  1. Metamorphosis

  2. Differentiation

  3. Regeneration

  4. Embryogenesis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Regeneration is the process by which a lost or damaged body part is restored to its original state.

Multiple choice

Which of the following is a type of stem cell that can differentiate into any type of cell in the body?

  1. Totipotent

  2. Pluripotent

  3. Multipotent

  4. Unipotent
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Totipotent stem cells are a type of stem cell that can differentiate into any type of cell in the body.

Multiple choice

What is the term for the process by which a cell undergoes a series of changes in form and function?

  1. Differentiation

  2. Metamorphosis

  3. Regeneration

  4. Embryogenesis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Differentiation is the process by which a cell undergoes a series of changes in form and function.

Multiple choice

Which of the following is a type of stem cell that is found in the umbilical cord?

  1. Hematopoietic Stem Cells

  2. Neural Stem Cells

  3. Mesenchymal Stem Cells

  4. Adipose Stem Cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mesenchymal stem cells are a type of stem cell that is found in the umbilical cord.

Multiple choice

Which of the following is a type of stem cell that is found in the bone marrow?

  1. Hematopoietic Stem Cells

  2. Neural Stem Cells

  3. Mesenchymal Stem Cells

  4. Adipose Stem Cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hematopoietic stem cells are a type of stem cell that is found in the bone marrow.

Multiple choice

Which of the following is a type of light microscopy that uses a series of lenses to focus light on a specimen?

  1. Confocal microscopy

  2. Electron microscopy

  3. Fluorescence microscopy

  4. Brightfield microscopy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Brightfield microscopy is a type of light microscopy that uses a series of lenses to focus light on a specimen, allowing for the visualization of cellular structures and components based on their light-absorbing properties.

Multiple choice

Which microscopy technique is commonly used to study the surface topography and mechanical properties of cells?

  1. Scanning electron microscopy (SEM)

  2. Transmission electron microscopy (TEM)

  3. Atomic force microscopy (AFM)

  4. Confocal microscopy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Atomic force microscopy (AFM) is a technique that uses a sharp probe to scan the surface of a specimen, providing information about its topography, mechanical properties, and local interactions.

Multiple choice

Which microscopy technique is commonly used to study the dynamics of cellular processes in real-time?

  1. Time-lapse microscopy

  2. Super-resolution microscopy

  3. Cryo-electron microscopy

  4. Scanning probe microscopy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Time-lapse microscopy involves capturing a series of images over time, allowing for the visualization and analysis of dynamic cellular processes, such as cell division, migration, and interactions.

Multiple choice

Which microscopy technique is commonly used to study the electrical properties of cells?

  1. Patch-clamp electrophysiology

  2. Atomic force microscopy (AFM)

  3. Fluorescence microscopy

  4. Scanning electron microscopy (SEM)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Patch-clamp electrophysiology is a technique used to study the electrical properties of cells by recording ionic currents through ion channels and transporters in the cell membrane.

Multiple choice

Which microscopy technique is commonly used to study the mechanical properties of cells and tissues?

  1. Atomic force microscopy (AFM)

  2. Scanning electron microscopy (SEM)

  3. Transmission electron microscopy (TEM)

  4. Confocal microscopy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Atomic force microscopy (AFM) is commonly used to study the mechanical properties of cells and tissues by measuring forces and interactions at the nanoscale, providing insights into cellular mechanics and tissue stiffness.

Multiple choice

Which of the following is an example of a cell signaling network?

  1. MAPK pathway

  2. PI3K pathway

  3. JAK-STAT pathway

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

MAPK pathway, PI3K pathway, and JAK-STAT pathway are all examples of cell signaling networks that are involved in various cellular processes.