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Cell Biology (cytology)

Cells are the building blocks of all life. Humans are multicellular beings. The study of cells in called cytology. Ask questions here about the structure and function of cells.

500 Questions

What are ribosomes made up of?

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Asked by Wiki User

Ribosomes are primarily responsible for biological synthesis of proteins. They are made up of ribosomal RNA and a variety of proteins.

Edit : RNA & Proteins

Sites where ribosomes are made?

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Asked by Wiki User

Nucleus

They are made in the nucleolus.Nucleolus is in the nucleus

Explain why a virus might exist for years and only become active once it comes into contact with a living cell?

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Asked by Wiki User

Viruses are non living entities and to get activated it requires to get attached with a living entity to perform the active processes .

Are there any cell phone accessories made in America?

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Asked by Wiki User

Yes, there are cell phone accessories made in America. Several companies, such as OtterBox, ZAGG, and Incipio, manufacture cell phone accessories domestically. These accessories include phone cases, screen protectors, chargers, and more. Additionally, some smaller businesses and artisans in the USA create handmade or custom cell phone accessories. Search FashionTIY in Google.

What is the function of ribosomes in cells?

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Asked by Curtis Strite

A ribosome is a molecular machine that coordinates protein assembly. Ribosomes are composed of several proteins with tightly coiled RNA (called ribosomal RNA or rRNA) wrapped around them. Ribosomes consist of two parts, the large and small subunits, which clamp around the mRNA that needs to be translated.

A ribosome brings together correctly the mRNA, which needs to be translated, and the tRNA, which assists in the translation process, to come together correctly. During translation, tRNA molecules carrying amino acids are positioned in the ribosome’s two docking sites. Afterwards, this machinery can disassemble and be reused many times. In the upcoming animation, you will see a ribosome assembling a polypeptide chain, a future protein.

What household item represent the ribosome?

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Asked by Wiki User

Some examples of household items that represent ribosomes functions are a see through plastic bowl represents a cell wall and small mittens represent ribosomes. Peas could also represent ribosomes.

What is iron overload protein?

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Asked by Wiki User

A side effect of frequent blood transfusions in which the body accumulates abnormally high levels of iron

Why do plants have cell walls and animals don't?

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Asked by Wiki User

Plants have cell walls, while animals do not, due to differences in their evolutionary history, structure, and the functions of their cells.

Plants:

  1. **Structural Support:**

    • The primary function of plant cell walls is to provide structural support to plant cells. Plant cells have a rigid cell wall composed mainly of cellulose, a complex carbohydrate. This rigid structure helps plants maintain their shape and withstand the pressure generated by the influx of water during osmosis.
  2. **Protection:**

    • Cell walls protect plant cells from external mechanical damage and pathogens. The tough and rigid cell wall acts as a barrier, preventing physical damage and helping to resist the entry of pathogens.
  3. **Water Regulation:**

    • The cell wall also plays a role in regulating water balance. It allows water to pass through while preventing the cell from bursting due to excessive water uptake. This is crucial for turgor pressure, which helps maintain cell and plant rigidity.
  4. **Support for Growth:**

    • As plants grow, new cells are continuously added. The cell walls allow for the elongation of cells while maintaining structural integrity.

Animals:

  1. **Extracellular Matrix:**

    • Instead of cell walls, animal cells are surrounded by an extracellular matrix (ECM) made up of proteins and other molecules. The ECM provides structural support to animal tissues, but it is more flexible than the rigid cell walls of plants.
  2. **Cell-to-Cell Communication:**

    • Animal cells rely on direct cell-to-cell communication through tight junctions, desmosomes, and gap junctions. The absence of rigid cell walls allows for greater flexibility and mobility in animal tissues.
  3. **Adaptation to Environment:**

    • Animals have evolved a wide range of adaptations for mobility, and the absence of a rigid cell wall allows for more flexibility and the ability to change shape. This is crucial for processes like muscle contraction and the movement of cells during development.
  4. **Phagocytosis:**

    • Animal cells, particularly certain immune cells, use a process called phagocytosis to engulf and digest particles. The flexibility of the cell membrane is essential for this process.

In summary, the presence of cell walls in plants and their absence in animals are adaptations that have evolved to suit the specific needs and lifestyles of each group of organisms. The rigid cell walls of plants provide structural support and protection, while the absence of cell walls in animals allows for greater flexibility, mobility, and adaptability to diverse environmental conditions.

What might Jones look like if drix hadn't saved his cytoplasm?

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Asked by Wiki User

What might Jones look like if Drix hadn't "saved his cytoplas

Are plant cells prokaryotic?

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Asked by Wiki User

Plant cells are Eukaryotic. Eukaryotic cells have a nuclei and membrane bound organelles. Prokaryotic cells are cells without a nuclei or membrane bound organelles. A bacteria cell is an example of a Prokaryotic cell. Plant and animal cell are examples for eukaryotic cells

Which accumulates in the inter membrane space of the mitochondrion during electron transport?

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Asked by Wiki User

During electron transport in the mitochondrion, protons (H+) accumulate in the intermembrane space. This happens as electrons are transferred through the electron transport chain, creating a proton gradient across the inner mitochondrial membrane. This gradient of protons is later utilized by ATP synthase to generate ATP through oxidative phosphorylation.

Is mitochondria known as the powerhouse cell?

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Asked by Wiki User

Yes, mitochondria are often called the "powerhouse of the cell" because they generate most of the cell's energy in the form of adenosine triphosphate (ATP). They carry out cellular respiration, which is a metabolic process that converts nutrients into ATP. This energy is essential for the cell to perform its functions.

What Cellular division causes organisms to grow primarily by increasing?

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Asked by Wiki User

The cellular division responsible for increasing the size of organisms is called mitosis. During mitosis, a single cell divides into two identical daughter cells, ensuring the growth and replenishment of cells in the body. This process occurs in most cells of the body, except for reproductive cells, which undergo a different type of division called meiosis.

How Harper cytoskeleton?

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Asked by Hedmundson

The Harper cytoskeleton is a fictional concept or term that does not have a specific meaning or definition. It does not exist in scientific literature or in the field of cell biology. Without further information or context, it is not possible to provide a specific answer about the Harper cytoskeleton.

Is heat carried to or away from blood cells?

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Asked by Wiki User

Heat is carried away from blood cells. The blood acts as a carrier of heat from the body's core to the skin, where heat can be released to the environment. This helps regulate body temperature and prevent overheating.

What cell structures are in yogurt cells?

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Asked by Wiki User

Yogurt cells contain various cell structures, including the cell membrane, cytoplasm, nucleus, and organelles such as mitochondria and ribosomes. Additionally, yogurt cells may also contain bacterial structures, such as the cell wall, nucleoid (bacterial equivalent of a nucleus), and plasmids (small circular pieces of DNA).

What is a flattened membrane that packages proteins?

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Asked by Wiki User

The endoplasmic reticulum (ER) is a flattened membrane that packages proteins. It plays a critical role in the synthesis, folding, and sorting of proteins. The ER consists of two main regions: the rough ER, which is studded with ribosomes and involved in protein synthesis, and the smooth ER, which lacks ribosomes and is involved in lipid metabolism and detoxification.

Where can you find information on upcoming cell phones?

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Asked by Wiki User

You can find information on upcoming cell phones by visiting the websites of mobile phone manufacturers, reading technology news websites, following tech influencers on social media, or joining online forums and communities dedicated to mobile phones and technology.

What travels from your brain to your skeletal muscle cells when you move?

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Asked by Wiki User

When you decide to move, an electrical signal called an action potential is generated in your brain. This signal travels along your neurons and reaches the skeletal muscle cells via motor neurons. At the neuromuscular junction, a chemical called acetylcholine is released, which stimulates the muscle fibers to contract and initiate movement.

What is the main function of the Golf apparatus?

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Asked by Wiki User

The main function of the golf apparatus, typically referring to golf clubs and balls, is to enable players to accurately hit and propel the ball towards the desired target. Golf clubs are designed to provide different levels of control, distance, and loft, while golf balls are designed for optimal flight and distance. The combination of these apparatus allows players to play the game of golf.

What is the functional relationship between lysosomes and mitochondria?

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Asked by Wiki User

Lysosomes and mitochondria have distinct functions in a cell, but they may indirectly interact with each other. Lysosomes primarily function in intracellular digestion and waste removal, breaking down cellular waste and debris. In contrast, mitochondria are responsible for energy production through cellular respiration. While there may not be a direct functional relationship between the two organelles, lysosomes can play a role in removing damaged or dysfunctional mitochondria through a process called autophagy.

What organelles do the guard cells contain that the surrounding epidermal cells do not?

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Asked by Wiki User

Guard cells contain specialized organelles called chloroplasts, which are responsible for photosynthesis. These chloroplasts enable guard cells to produce sugars and other molecules needed for energy. The surrounding epidermal cells, on the other hand, do not typically contain chloroplasts as they are not directly involved in photosynthesis.

Which of the vitamin will not be synthesized in a person confined to a dark cell for a long time?

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Asked by Wiki User

Vitamin D is not synthesized in the body when a person is confined to a dark cell for a long time. However, it can be obtained through diet or supplements. Vitamin D is primarily synthesized in the skin in response to sunlight exposure, so lack of sunlight would hinder its natural production in the body.

What is protesta?

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Asked by Wiki User

Protesta is a Spanish word that translates to "protest" in English. It refers to a public display of disagreement or objection to a particular issue, often accompanied by rallies, marches, or demonstrations. Protesta is a form of civil expression commonly used to advocate for social, political, or economic change.

What is the average number of cells In telophase?

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Asked by Wiki User

The average number of cells in telophase depends on the specific biological system or organism being studied. In general, telophase is the final stage of cell division and leads to the formation of two daughter cells. Therefore, if a single parent cell is undergoing division, the average number of cells in telophase would be two.