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

Which of the following is a type of cancer that originates in the cells of the breast?

  1. Lung cancer

  2. Breast cancer

  3. Leukemia

  4. Colon cancer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Breast cancer is a type of cancer that originates in the cells of the breast.

Multiple choice

Which of the following is NOT a type of biological macromolecule?

  1. Carbohydrates

  2. Lipids

  3. Proteins

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

Nucleotides are not macromolecules but are building blocks of nucleic acids.

Multiple choice

Which of the following is NOT a type of biological buffer?

  1. Carbonic acid-bicarbonate buffer

  2. Phosphate buffer

  3. Protein buffer

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

Proteins can act as buffers, but they are not typically referred to as biological buffers.

Multiple choice

Which of the following is NOT a type of biological membrane?

  1. Plasma membrane

  2. Nuclear membrane

  3. Mitochondrial membrane

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

Cell walls are not biological membranes but are found in plant cells.

Multiple choice

What is the primary characteristic of stem cells?

  1. Ability to differentiate into various cell types

  2. Rapid cell division

  3. Long lifespan

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

Stem cells are characterized by their ability to differentiate into various specialized cell types, contributing to the development and repair of tissues and organs.

Multiple choice

Which type of stem cells is found in adult tissues?

  1. Embryonic stem cells

  2. Induced pluripotent stem cells

  3. Mesenchymal stem cells

  4. Hematopoietic stem cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mesenchymal stem cells are multipotent stem cells found in adult tissues, including bone marrow, adipose tissue, and umbilical cord blood.

Multiple choice

Which of the following is the process by which cells become specialized?

  1. Differentiation

  2. Metamorphosis

  3. Regeneration

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

Differentiation is the process by which cells become specialized.

Multiple choice

Which of the following is the process by which an organism repairs damaged tissue?

  1. Regeneration

  2. Apoptosis

  3. Senescence

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

Regeneration is the process by which an organism repairs damaged tissue.

Multiple choice

Which of the following is the process by which cells die?

  1. Apoptosis

  2. Senescence

  3. Necrosis

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

Apoptosis is the process by which cells die.

Multiple choice

Which of the following is the process by which cells age?

  1. Senescence

  2. Necrosis

  3. Autophagy

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

Senescence is the process by which cells age.

Multiple choice

Which of the following is the process by which cells die in a non-apoptotic manner?

  1. Necrosis

  2. Autophagy

  3. Mitotic catastrophe

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

Necrosis is the process by which cells die in a non-apoptotic manner.

Multiple choice

Which of the following is the process by which cells self-digest?

  1. Autophagy

  2. Mitotic catastrophe

  3. Anoikis

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

Autophagy is the process by which cells self-digest.

Multiple choice

Which of the following is the process by which cells die due to a lack of attachment to the extracellular matrix?

  1. Mitotic catastrophe

  2. Anoikis

  3. Pyroptosis

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

Anoikis is the process by which cells die due to a lack of attachment to the extracellular matrix.

Multiple choice

What is the term for the process by which a cell degrades and recycles its own components?

  1. Apoptosis

  2. Autophagy

  3. Necrosis

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

Autophagy is the process by which a cell degrades and recycles its own components, including damaged proteins and organelles.

Multiple choice

Which theory of aging proposes that aging is caused by the accumulation of damaged molecules and cellular components?

  1. Telomere Theory

  2. Free Radical Theory

  3. Mitochondrial Theory

  4. DNA Damage Theory
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Free Radical Theory suggests that aging is caused by the accumulation of reactive oxygen species (ROS) and other free radicals, which can damage cellular components and lead to cellular dysfunction.