Answer the following questions
1. How do a stain colour's a cell ?
2. If an egg is a single complete cell, why can't we see cell organelles in it ?
3. Can cells be made in a laboratory?
4. What are cells made of?
5. A blood cell doesn't has a nucleus. Then how is it able to perform the functions necessary for life?
Answer the following questions
1. How do a stain colour's a cell ?
2. If an egg is a single complete cell, why can't we see cell organelles in it ?
3. Can cells be made in a laboratory?
4. What are cells made of?
5. A blood cell doesn't has a nucleus. Then how is it able to perform the functions necessary for life?
1)
Staining usually works by using a dye, that stains some of the cells components a bright colour, together with a counterstain that stains the rest of the cell a different colour.
2) In an unfertilized egg (the kind you buy at the grocery store), there is a small, whitish disk on one side of the yolk. This little structure is called the germinal disc, and it contains the nucleus and most of the cytoplasm of the egg cell. The yolk, however, is actually part of the cytoplasm of that cell, so that one could say that the yolk is actually a single huge cell.
You teacher is correct, however, in pointing out that the yolk itself doesn't contain the structures and organelles that we expect to find in living cells. In fact, it's little more than a mass of stored nutrition waiting for embryonic development.
Here's why your teacher's opinion is correct in an important way. If the cell is fertilized by a sperm, which happens inside the body of the hen before the shell is completely formed, the whole yolk doesn't divide. Instead, cell division is limited to the germinal disc, so that little cluster of cells known as the embryonic disc forms on top of the yolk. The embryo develops from this disk, and gradually sends blood vessels into the yolk to use it for nutrition as the embryo develops.
3)
Yes,An artificial cell or minimal cell is an engineered particle that mimics one or many functions of a biological cell. The term does not refer to a specific physical entity, but rather to the idea that certain functions or structures of biological cells can be replaced or supplemented with a synthetic entity.
4)
Two-thirds of a cell is water, which means that two-thirds of your whole body is water. The rest is a mixture of molecules, mainly proteins, lipids and carbohydrates. Your cells turn the raw materials in the food you eat into the molecules your body needs, using thousands of different chemical reactions.
5)It is not surprising that the cell doesn't have a nucleus. The loss of a nucleus renders it better oxygen carrying capability. Even platelets donot have a nucleus. There too, enzymes are prepared and stored beforehand.
Staining usually works by using a dye, that stains some of the cells components a bright colour, together with a counterstain that stains the rest of the cell a different colour.
2)
In an unfertilized egg (the kind you buy at the grocery store), there is a small, whitish disk on one side of the yolk. This little structure is called the germinal disc, and it contains the nucleus and most of the cytoplasm of the egg cell. The yolk, however, is actually part of the cytoplasm of that cell, so that one could say that the yolk is actually a single huge cell.
You teacher is correct, however, in pointing out that the yolk itself doesn't contain the structures and organelles that we expect to find in living cells. In fact, it's little more than a mass of stored nutrition waiting for embryonic development.
Here's why your teacher's opinion is correct in an important way. If the cell is fertilized by a sperm, which happens inside the body of the hen before the shell is completely formed, the whole yolk doesn't divide. Instead, cell division is limited to the germinal disc, so that little cluster of cells known as the embryonic disc forms on top of the yolk. The embryo develops from this disk, and gradually sends blood vessels into the yolk to use it for nutrition as the embryo develops.
3)Yes,An artificial cell or minimal cell is an engineered particle that mimics one or many functions of a biological cell. The term does not refer to a specific physical entity, but rather to the idea that certain functions or structures of biological cells can be replaced or supplemented with a synthetic entity.
4)
Two-thirds of a cell is water, which means that two-thirds of your whole body is water. The rest is a mixture of molecules, mainly proteins, lipids and carbohydrates. Your cells turn the raw materials in the food you eat into the molecules your body needs, using thousands of different chemical reactions.
5)It is not surprising that the cell doesn't have a nucleus. The loss of a nucleus renders it better oxygen carrying capability. Even platelets donot have a nucleus. There too, enzymes are prepared and stored beforehand.
