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

What is the basic unit of life?

  1. Cell

  2. Tissue

  3. Organ

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

The cell is the basic unit of life because it is the smallest unit that can carry out all of the functions of life.

Multiple choice

What is the function of the Golgi apparatus in a cell?

  1. Packages and distributes proteins

  2. Stores the cell's DNA

  3. Produces ribosomes

  4. Controls the cell's activities
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Golgi apparatus packages and distributes proteins.

Multiple choice

What is the function of the cytoplasm in a cell?

  1. Contains the cell's organelles

  2. Stores the cell's DNA

  3. Produces ribosomes

  4. Controls the cell's activities
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The cytoplasm contains the cell's organelles.

Multiple choice

Which cells are responsible for forming the blood-brain barrier?

  1. Astrocytes

  2. Neurons

  3. Oligodendrocytes

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

The blood-brain barrier is formed by a layer of endothelial cells that line the blood vessels in the brain. These cells are tightly connected to each other, forming a barrier that prevents harmful substances from entering the brain.

Multiple choice

Which type of lung cancer is characterized by the presence of small, round cells?

  1. Squamous Cell Carcinoma

  2. Adenocarcinoma

  3. Small Cell Lung Cancer

  4. Large Cell Carcinoma
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Small cell lung cancer is characterized by the presence of small, round cells.

Multiple choice

Which type of lung cancer is characterized by the presence of large, polygonal cells?

  1. Squamous Cell Carcinoma

  2. Adenocarcinoma

  3. Small Cell Lung Cancer

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

Large cell carcinoma is characterized by the presence of large, polygonal cells.

Multiple choice

Which of the following is NOT a type of animal 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 animal tissue, but rather a type of specialized tissue that makes up the nervous system.

Multiple choice

Where does the Calvin cycle take place?

  1. Stroma

  2. Thylakoid membranes

  3. Cytoplasm

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

The Calvin cycle takes place in the stroma of chloroplasts. This is where carbon dioxide is converted into glucose using ATP and NADPH generated in the light-dependent reaction.

Multiple choice

In biology, topology is used to study the structure and properties of which biological objects?

  1. Cells

  2. Proteins

  3. DNA

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

Topology is used in biology to study the structure and properties of proteins, including their folding patterns and interactions with other molecules.

Multiple choice

What is the term used to describe meat produced from animal cells grown in a laboratory setting?

  1. Cellular Meat

  2. Cultured Meat

  3. In Vitro Meat

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

Cellular meat, also known as cultured meat or in vitro meat, refers to meat produced by growing animal cells in a controlled environment, without the need for raising and slaughtering animals.

Multiple choice

Which of the following is NOT a hallmark of cancer?

  1. Uncontrolled cell growth

  2. Invasion and metastasis

  3. Angiogenesis

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

Differentiation is the process by which cells become specialized in their function. It is not a hallmark of cancer, which is characterized by uncontrolled cell growth and invasion.

Multiple choice

What is angiogenesis?

  1. The formation of new blood vessels

  2. The breakdown of blood vessels

  3. The migration of cells from one location to another

  4. The differentiation of cells into specialized cell types
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Angiogenesis is the formation of new blood vessels. It is essential for tumor growth and metastasis, as it provides the tumor with nutrients and oxygen.

Multiple choice

What is metastasis?

  1. The spread of cancer cells from one location to another

  2. The growth of new tumors in the same location

  3. The shrinkage of tumors

  4. The differentiation of tumors into benign tumors
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Metastasis is the spread of cancer cells from one location to another. It is the most common cause of death from cancer.

Multiple choice

Which of the following is NOT a type of cancer 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
A Correct answer
Explanation

Embryonic stem cells are not a type of cancer stem cell. Cancer stem cells are a small population of cells within a tumor that have the ability to self-renew and differentiate into different types of cancer cells.

Multiple choice

How are proteins made?

  1. They are synthesized in the ribosomes.

  2. They are synthesized in the nucleus.

  3. They are synthesized in the mitochondria.

  4. They are synthesized in the Golgi apparatus.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Proteins are synthesized in the ribosomes. The ribosomes read the genetic code in messenger RNA (mRNA) and assemble amino acids into a protein chain.