Important Questions and Answers related to Cell || Cell (Koshika) questions and answers | Biology Quiz | Cell Biology Topics | Information related to cytology.

Important Cell Related Questions – Biology Quiz | Cell Biology Topics – In this article, we have included some important questions related to cells along with their answers. In the article, we have added Koshika – important questions and answers from the point of view of all the examinations related to cell. Also important cell related questions – biology quiz. Cell Biology Topics, important questions of cytology (cell biology topics) – important questions and answers (biology gk questions) on cytology or cell biology general science questions that are frequently asked in competitive exams etc. It has been included in this.

What do you understand by cell?

Cell is the structural and functional unit of living organisms. Cells usually have the ability to reproduce on their own. It is that smallest organized form of various substances in which all those activities take place which collectively we call life. All the biological activities of living things take place within the cells. The life of every living organism begins with a single cell. If it continues its life with the help of this single cell, then it is called a unicellular organism, but in most of the organisms this cell divides and eventually becomes a multicellular organism.

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How many cells are there?

The body of some organisms like bacteria is made up of a single cell, they are called unicellular organisms while some organisms like human body is made up of many cells, they are called multicellular organisms. The human body is made up of about 60-90 trillion cells.

Who discovered the cell and when?

The cell was first discovered by Robert Hooke in 1665. In a fine piece of cork he found beehive-like cells, which he named the cell. This discovery of Hooke led to the understanding of cells as the smallest units of life and laid the foundation of the cell theory. In 1939, Schleiden and Schwann presented the cell theory, according to which the body of all living beings is made up of one or more cells and all cells originate from a pre-existing cell.

Who presented the cell theory?

In 1939, Schleiden and Schwann presented the cell theory, according to which the body of all living beings is made up of one or more cells and all cells originate from a pre-existing cell.

Why are cells usually small?

The surface to volume ratio becomes smaller as the cell grows. Thus, if the cell grows beyond a certain threshold, not enough material will be able to cross the cell membrane, which is why cells are generally smaller in size.

What is the function of the cell?

All the biological activities of living things take place within the cells. Within the cells are the necessary genetic information that controls the functions of the cell and the information is transferred to the next generation of cells. Cell is the structural and functional unit of living organisms. Cells usually have the ability to reproduce on their own. It is that smallest organized form of various substances in which all those activities take place which collectively we call life.

Which is the largest organelle of the cell?

The nucleus is the largest organelle of the cell. The structure located in the cytoplasm which controls the activities of the protoplasm, that is, controls the cell, is called the nucleus. The nucleus is the most important part of the cell which plays an important role as the manager of the cell. The nucleus contains the hereditary information of the cell and also controls the growth and reproduction of the cell.

What do you understand by eukaryotic?

In this type of cells, fully developed nucleus i.e. nuclear artefact and nucleated and fully developed cell organelles are found. The nucleosome, a unit made up of DNA and histone proteins, is found in the chromosomes of these types of cells. These cells i.e. eukaryotic cells with true nucleus are found in most of the algae, higher plants and animals.

What is a prokaryotic cell?

Prokaryotic cells do not have a nucleus. Thus the nuclear material is dispersed in the cytoplasm. In place of chromosomes, histones are threads of protein-free DNA. Such cells lack fully developed organelles. These cells i.e. prokaryotic cells without true nucleus are found in blue-green algae, mycoplasma and bacteria.

Which is the smallest cell in the human body?

Sperm is the smallest cell in the human body. It is a male germ cell.

Where is cell art found?

The nucleus is a circular or elliptical structure located approximately in the middle of the cell. Generally only one nucleus is found in a cell. The nucleus is a structure surrounded by a double layered covering called the nucleus. Cell membrane or cell membrane The outermost layer of the cell, which separates its various components from the external environment.

What is the name of the smallest cell?

Mycoplasma is known as the smallest living cell but it does not have a cell wall. These are unicellular organisms that can survive without oxygen.

How did Robert Hooke discover the cell?

The cell was first discovered by “Robert Hooke” in 1665. Robert Hooke, with the help of a compound microscope, observed beehive-like cells in fine pieces of bottle cork, which he named “cell”. That’s why he is called the discoverer of the cell.

What is cell cycle?

The cell cycle, or cell-division cycle, is the chain of events occurring in a cell that causes it to divide into two daughter cells.

What is the sequence of the cell cycle?

A cell cycle is a series of events that occurs as a cell grows and divides, that is, the sequence of events in which the cell doubles its genome and synthesizes other components, and then divides to form two new daughter cells. It is called the cell cycle. There are two basic phases of the cell cycle, that is, the whole process is completed in two phases, in the first phase the division of the nucleus of the cell takes place. This process is called karyokinesis. The second stage of division is the division of the cytoplasm. This process is called cytoplasmic division.

How long is the cell cycle in humans?

The cell cycle in humans is of 24 hours.

Which is the longest phase of the cell cycle?

The whole process of the cell cycle is completed in two phases, in the first phase the division of the nucleus of the cell takes place. This process is called karyokinesis. The second stage of division is the division of the cytoplasm. This process is called cytoplasmic division.

What is the pacific phase of the cell cycle?

Cells that do not divide further and enter a dormant state called the pacific phase (G0) of the cell cycle. Cells in this stage are metabolically active, but do not divide, dividing according to the needs of the organism.

How long does it take for yeast to complete the cell cycle?

It takes about ninety minutes for the yeast cell cycle to complete.

What is protoplasm?

A large part of the cell, which is a fluid surrounded by the cell membrane or plasma membrane. It consists of many cell components, called cell organelles, that perform specific functions for the cell. The cytoplasm and nucleus together are called protoplasm. This cytoplasm is viscous, colorless and granular. Enzymes are abundant here.

When was the Golgi body discovered?

The Golgi apparatus (also known as the Golgi complex, Golgi body) was identified by the Italian scientist Camillo Golgi in 1897 and renamed the Golgi body in 1898. Camillo Golgi was an Italian neuroscientist who detected it in the neurons of the Barn Owl, which is famous by its name. Its shape is flat and they have been fixed one after the other in parallel. Golgi bodies are also called lipochondria or dictyosome.

Who is called the traffic police of the cell?

The cell to the Golgi body is also called the ‘traffic police’.

Which part of the cell is known as the suicide sac?

The lysosome is called the suicide sac or suicide sac of the cell. It is the waste disposal system of the cell.

The cell to the Golgi body is also called the ‘traffic police’.

Which part of the cell is known as the suicide sac?

The lysosome is called the suicide sac or suicide sac of the cell. It is the waste disposal system of the cell. Lysosomes contain very powerful digestive enzymes that break down organic matter. When a cell is damaged or dies due to an interruption in cellular metabolism, the lysosomes rupture and digest or eat or perish on their own. Basically lysosomes are the stomach (stomach) of the cell. When these acid-filled sacs burst, their acid elements destroy the cell itself.

Why are lysosomes called suicide bags?

Lysosomes are called suicide bags because they are the waste disposal system of the cell. Lysosomes contain very powerful digestive enzymes that break down organic matter. When a cell is damaged or dies due to an interruption in cellular metabolism, the lysosomes rupture and digest or eat or perish on their own. Basically lysosomes are the stomach (stomach) of the cell. When these acid-filled sacs burst, their acid elements destroy the cell itself.

Which part of the cell is called the powerhouse and why?

Since mitochondria provide energy in the form of ATP to perform all the necessary chemical reactions, therefore mitochondria is called the energy plant or power house of the cell. The enzymes contained in the mitochondria oxidize food substances to produce energy, which is ATP. as collected.

Draw a diagram of a human nerve cell. , What is the function of nerve cells?

The nerve cell receives and transfers messages, through which it performs the function of control and coordination in the body. The function of this cell is to exchange and analyze information with the brain, when something is touched, sound or light, these nerve cells react and they send their signals to the spinal cord and brain. Motor nerve cells receive signals from the brain and spinal cord. The contractility of muscles and glands is affected by this. A normal and simple nerve cell consists of a cell i.e. soma, dendrites and action. The main part of the nerve cell is the soma.

Why are mitochondria called the energy of the cell?

Mitochondria are found inside any cell whose main job is to transport energy to every part of the cell. The enzymes contained in the mitochondria oxidize food substances to produce energy, which is ATP. as collected. For this reason mitochondria are also called the power house of the cell.

What is called a semi-autonomous organelle?

The enzymes of the Krebs cycle, DNA, ribosomes and RNA are located in the matrix of the mitochondria, so mitochondria are called semi-autonomous organelles.

What is a semi-autonomous cell organelle?

Mitochondria and chloroplasts are called semi-autonomous organelles.

What is the difference between plant cell and animal cell?

plant cell

• The cytoplasm is surrounded by a wall called the cell wall, which is usually made of a material called cellulose.
• There are large vacuoles, which surround a large part of the cell.
• Plastids are found (green chloroplasts, colorless leucoplasts and colored chromoplasts).
• Centrosomes are not found in most plant cells.
• Lysosomes are not found in most plant cells.

animal cell

There is no wall outside the cell membrane. The cell art itself is the boundary of the cell.
The vacuoles are absent or very small. Hence the cytoplasm remains evenly distributed throughout the cell.
Lovers are not found.
Centrosomes are found in most animal cells.
Lysosomes are found.

Which organisms are included in prokaryotic?

Prokaryotic cells These cells are found in blue-green algae and bacteria. In prokaryotic cell, chloroplast, Golgibari, stellate body, microchondria and endoplasmic reticulum (E.R.) are not found. However, 70S type ribosomes are found and DNA is not associated with histone proteins.

Which is a prokaryotic organism?

Mycoplasma is the smallest known prokaryotic organism. Mycoplasmas are the smallest free-living organisms and are considered the simplest of bacteria. They belong to the bacterial class Mollicutes, whose members are distinguished by their lack of a cell wall and their plasma-like appearance.

What is mycoplasma?

Mycoplasmas are the smallest free-living organisms and are considered the simplest of bacteria. They belong to the bacterial class Mollicutes, whose members are distinguished by their lack of a cell wall and their plasma-like appearance. Mycoplasma is the smallest known prokaryotic organism.

What is the name of the longest cell?

The longest cell in humans are neurons, which are also called nerve cells. Neurons or nerve cells can be up to 3 feet long. These are the basic units of the brain and nervous system. A typical neuron has a cell morphology called a soma, their hair-like structures called dendrites, and an axon. Neurons are capable of transmitting knowledge through the brain throughout the body. In neurons also, especially the motor neuron (motor neuron) is the largest cell. The human egg in women’s bodies, which is an exception, is actually the largest cell in the body.

Which is the largest cell in the female body?

The human egg or scrotum, which is an exception, is actually the largest cell in the body and can be seen without a microscope. Compared to other human cells, egg cells are very large. They are 100 microns in diameter (that’s one-millionth of a meter) and the width of a strand of hair.

Which is the smallest human cell?

The granule cell of the cerebellum is the smallest cell in the human body, which is 4 micrometers to 4.5 micrometers long. The size of RBC has also been found to be about 5 micrometers.

Which is the longest and largest cell in the human body?

The human egg or scrotum is the largest cell in the human body (in females). The nerve cell is the longest cell in the body.

What are the functions of cell membrane?

The cell membrane is flexible and contains organic molecules; For example, it is made up of glycoproteins and glycolipids. The flexibility of the cell membrane helps in taking up food and other substances from the cell’s external environment in unicellular organisms. This process is called endocytosis. Amoeba consumes food by this process. The cell membrane forms the shape of the cell and protects the organism. Along with controlling the action of cell membrane, intercellular diffusion and osmosis, it also helps in the formation of various structures. The cell membrane was called cytoplasmic art by C. Kramer and Naegeli (1855) and protoplasm by Plow.

What is cell art?

Cell membrane or cell membrane The outermost layer of the cell, which separates its various components from the external environment. All the components of the cell are surrounded by a thin membrane. This membrane allows essential substances to pass in or out. This is called selective permeability. From this point of view O2 and CO2 are carried in and out of the cell by the process of diffusion across the cell membrane and the process of water osmosis.

Who makes lysosomes?

Lysosomes are round single membrane sacs found mainly in animal cells, containing 50 hydrolytic enzymes. They are surrounded by a single membrane that is up to 100 nm in thickness. They are made by the Golgi apparatus and contain about 60 different types of acid hydrolases that help in the digestion of various materials. , it operates at around 5 pH. It is the waste disposal system of the cell. Digestive enzymes present in lysosomes break down organic matter. Lysosomes are also called suicide bags.

When did Robert Hooke discover the cell?

The cell was discovered by Robert Hooke in 1665. Cell is the structural and functional unit of living organisms. The cell usually has the ability to reproduce itself. It is that smallest organized form of various substances in which all those activities take place which collectively we call life.

What is the difference between prokaryotic and eukaryotic cell?

Prokaryotic cells do not have a nucleus. Thus the nuclear material is dispersed in the cytoplasm. In place of chromosomes, histones are threads of protein-free DNA. Such
Cells lack fully developed organelles. These cells i.e. prokaryotic cells without true nucleus are found in blue-green algae, mycoplasma and bacteria.

Eukaryotic Cell Cells have a fully developed nucleus ie nuclear artefact and nucleated and fully developed cell organelles. The nucleosome, a unit made up of DNA and histone proteins, is found in the chromosomes of these types of cells. These cells i.e. eukaryotic cells with true nucleus are found in most of the algae, higher plants and animals.

What are found in common in plant and animal cells?

Structurally, plant and animal cells are very similar as they are both eukaryotic cells. Both contain membrane-bound organelles such as nucleus, mitochondria, endoplasmic reticulum, golgi body, lysosome and peroxisome. Both also have similar membrane, cytosol and cytoskeletal elements. The cell theory was presented by botanist Schleiden and zoologist Schwann, according to which, all plants and animals are made of cells and they are the basic unit of life. The body of living organisms (animals and plants) is made up of one or more cells, which is the structural and functional unit of the body and its physical basis is the protoplasm. The cell theory was presented by botanist Schleiden and zoologist Schwann, according to which, all plants and animals are made of cells and they are the basic unit of life. The body of living organisms (animals and plants) is made up of one or more cells, which is the structural and functional unit of the body and its physical basis is the protoplasm.

What is the difference between plant cell and animal cell?

In a plant cell, the cytoplasm is surrounded by a wall called the cell wall, which is usually made of a material called cellulose.
Plant cells have large vacuoles, which enclose a large part of the cell. Plant cells contain fungi (green chloroplasts, colorless leucoplasts and colored chromoplasts). Centrosomes are not found in most plant cells. Lysosomes are not found in most plant cells.

Whereas in animal cell there is no wall outside the cell membrane. The cell art itself is the boundary of the cell. In animal cells, vacuoles are absent or very small. Therefore, the cytoplasm remains evenly distributed in the cell. Activators are not found in animal cells. Centrosomes are found in most animal cells. Lysosomes are found in animal cells.

How are lysosomes produced?

Lysosomes are formed by the endoplasmic reticulum and the Golgi body. The enzymes of lysosome are produced by the endoplasmic reticulum. Lysosomes are round single membrane sacs found mainly in animal cells, containing 50 hydrolytic enzymes, which function at approximately 5 pH. It is the waste disposal system of the cell. Digestive enzymes present in lysosomes break down organic matter. Lysosomes are also called suicide bags.

What are the three functions of mitochondria?

Where the mitochondria go to the power house of the cell, the energy released during oxygen is stored in the form of adenosine triphosphate (ATP) and the mitochondria provide energy in the form of ATP to perform all the necessary chemical reactions. The enzymes of the Krebs cycle, DNA, ribosomes and RNA are located in the matrix of the mitochondria, so mitochondria are called semi-autonomous organelles.

Where are Lavaks found?

Fungi are round or oval structures found in the cytoplasm of plant cells, in which chemicals important to plants are made. Fungi are located only in plant cells. These are of three types i.e. haritlavak, achromatic lacquer and varni lacquer. In the green pigment called chloroplast, the most important biochemical process of the organism is photosynthesis.

Which cell organelle is the active respiratory site?

The site of respiration in the cell is called mitochondria. Respiration is the process during which the production of adenosine triphosphate (ATP) necessary for the supply of energy to the cell for the needs of the body at its level is produced through the action of respiration. Where the mitochondria go to the power house of the cell, the energy released during oxygen is stored in the form of adenosine triphosphate (ATP) and the mitochondria provide energy in the form of ATP to perform all the necessary chemical reactions.

What is located in the endoplasm of mitochondria?

The succinic dehydrogenase enzyme of the Krebs cycle is located in the interior of the mitochondria.

Which part of the cell is the basis of life?

Huxley said that protoplasm is the physical basis of life.

What is the function of Golgi body?

Golgi bodies participate in the formation of the cell plate in plant cells, so the number increases during cell division.

Who is called Lomasome?

In fungi, a special structure found between the cell wall and plasmalema is called lomasome.

What type of ribosomes are there in the cytoplasm, chloroplast and mitochondria of a eukaryotic cell?

80S type ribosomes are present in the cytoplasm of eukaryotic cell and 70S type ribosomes are present in chloroplast and mitochondria.

How are ribosomes attached to the endoplasmic reticulum?

Ribosomes are attached to the endoplasmic reticulum by a glycoprotein ribophorin.

What is synthesized on the flat endoplasmic reticulum?

The synthesis of lipids takes place on the flat endoplasmic reticulum.

chloroplast size in different organisms

In Chlorella and Chlamydomonas the chloroplasts are cup-shaped, in Eulothrix they are helical, in Jignema the stars are reticulated, in Cladophora and Oudogonium are reticulate and in Spirogyra are annular.

What is grana not found in?

Granules are not found in the chloroplasts of algae and bundle sheath cells.

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