Biology ยท Science General

Cell Biology and Structure

3,062 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 type of cancer is characterized by the uncontrolled growth of cells in the lining of the colon or rectum?

  1. Lung Cancer

  2. Breast Cancer

  3. Colon Cancer

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

Colon cancer arises from the abnormal growth of cells in the colon or rectum, leading to the formation of malignant tumors.

Multiple choice

How are exosomes isolated and purified?

  1. Ultracentrifugation

  2. Size-exclusion chromatography

  3. Immunoaffinity capture

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

Exosomes can be isolated and purified using various techniques, including ultracentrifugation, size-exclusion chromatography, and immunoaffinity capture.

Multiple choice

Which theory suggests that aging is a result of the accumulation of cellular damage over time?

  1. Wear-and-Tear Theory

  2. Free Radical Theory

  3. Programmed Aging Theory

  4. Telomere Shortening Theory
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Wear-and-Tear Theory proposes that aging is caused by the gradual deterioration of cells and tissues due to everyday wear and tear.

Multiple choice

What is the term used to describe the phenomenon where transplanted tissues or cells are recognized as self by the recipient's immune system?

  1. Immune tolerance

  2. Immunosuppression

  3. Immune privilege

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

Immune tolerance refers to the phenomenon where the immune system recognizes and accepts transplanted tissues or cells as self, preventing immune rejection.

Multiple choice

Which organelle is responsible for producing energy in a cell?

  1. Mitochondria

  2. Chloroplasts

  3. Ribosomes

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

Mitochondria are responsible for producing energy in a cell through the process of cellular respiration.

Multiple choice

Which organelle is responsible for packaging and distributing proteins in a cell?

  1. Golgi apparatus

  2. Endoplasmic reticulum

  3. Lysosomes

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

The Golgi apparatus is responsible for packaging and distributing proteins in a cell.

Multiple choice

Which organelle is responsible for digesting cellular waste and foreign materials?

  1. Lysosomes

  2. Peroxisomes

  3. Endosomes

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

Lysosomes are responsible for digesting cellular waste and foreign materials.

Multiple choice

Which of the following is NOT a type of cell junction?

  1. Tight junctions

  2. Gap junctions

  3. Desmosomes

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

Plasmodesmata are not a type of cell junction. Tight junctions, gap junctions, and desmosomes are all types of cell junctions.

Multiple choice

Which of the following is NOT a type of cell death?

  1. Apoptosis

  2. Necrosis

  3. Autophagy

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

Mitotic catastrophe is not a type of cell death. Apoptosis, necrosis, and autophagy are all types of cell death.

Multiple choice

Which of the following is NOT a type of stem cell?

  1. Embryonic stem cells

  2. Adult stem cells

  3. Induced pluripotent stem cells

  4. Cancer stem cells
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cancer stem cells are not a type of stem cell. Embryonic stem cells, adult stem cells, and induced pluripotent stem cells are all types of stem cells.

Multiple choice

Which of the following is NOT a type of cell differentiation?

  1. Terminal differentiation

  2. Dedifferentiation

  3. Transdifferentiation

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

Dedifferentiation is not a type of cell differentiation. Terminal differentiation, transdifferentiation, and metaplasia are all types of cell differentiation.

Multiple choice

Which of the following is NOT a type of cell migration?

  1. Chemotaxis

  2. Haptotaxis

  3. Contact inhibition

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

Anoikis is not a type of cell migration. Chemotaxis, haptotaxis, and contact inhibition are all types of cell migration.

Multiple choice

Where does the electron transport chain take place in a eukaryotic cell?

  1. Cytoplasm

  2. Mitochondria

  3. Nucleus

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

The electron transport chain is located in the inner mitochondrial membrane of eukaryotic cells.

Multiple choice

Which of the following is NOT a type of cell signaling?

  1. Autocrine signaling

  2. Paracrine signaling

  3. Endocrine signaling

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

Synaptic signaling is not a type of cell signaling. It is a type of communication between neurons.

Multiple choice

Which of the following is NOT a type of tissue?

  1. Epithelial tissue

  2. Connective tissue

  3. Muscle tissue

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

Nervous tissue is not a type of tissue. It is a type of organ system.