Cell Biology and Structure

It consists of nucleoplasm surrounded by a nuclear membrane. The nuclear membrance is perforated and the pores are called nuclear pores or nucleopores. The nucleoplasm possesses chromatin reticulum and 1 or 2 darkly stained bodies called nucleoli (sing-nucleolus). The chromatin reticulum is made up of DNA which is the genetic material and associated histone proteins. The nucleus contains genes in the form of DNA which are responsible for inheritance of characters.

It consists of nucleoplasm surrounded by a nuclear membrane. The nuclear membrance is perforated and the pores are called nuclear pores or nucleopores. The nucleoplasm possesses chromatin reticulum and 1 or 2 darkly stained bodies called nucleoli. The nucleoplasm consists of more than 90% proteins, RNA and phospholipids. The nuclear membrance separates the nucleoplasm from the cytoplasm but at the same time it allows the exchange of necessary materials through nuclear pores.

It consists of nucleoplasm surrounded by a nuclear membrane. The nuclear membrance is perforated and the pores are called nuclear pores or nucleopores. The nuclear membrance is a double unit membrane enclosing a perinuclear space. The nucleoplasm possesses chromatin reticulum and 1 or 2 darkly stained bodies called nucleoli (sing-nucleolus). The chromatin reticulum is made up of DNA which is the genetic material and associated histone proteins. The nucleoplasm consists of more than 90% proteins, RNA and phospholipids.

It consists of nucleoplasm surrounded by a nuclear membrane. The nuclear membrance is perforated and the pores are called nuclear pores or nucleopores. The nucleoplasm possesses chromatin reticulum and 1 or 2 darkly stained bodies called nucleoli (sing-nucleolus). The chromatin reticulum is made up of DNA which is the genetic material and associated histone proteins. The nucleus contains genes in the form of DNA which are responsible for inheritance of characters.

It consists of nucleoplasm surrounded by a nuclear membrane. The nuclear membrance is perforated and the pores are called nuclear pores or nucleopores. The nuclear membrance is a double unit membrane enclosing a perinuclear space. The nucleoplasm possesses chromatin reticulum and 1 or 2 darkly stained bodies called nucleoli (sing-nucleolus). The chromatin reticulum is made up of DNA which is the genetic material and associated histone proteins. The nucleoplasm consists of more than 90% proteins, RNA and phospholipids.

It consists of nucleoplasm surrounded by a nuclear membrane. The nuclear membrance is perforated and the pores are called nuclear pores or nucleopores.The nucleoplasm possesses chromatin reticulum and 1 or 2 darkly stained bodies called nucleoli (sing-nucleolus). The nucleoplasm consists of more than 90% proteins, RNA and phospholipids. The nucleolus is concerned with the formation of ribosomes.

It consists of nucleoplasm surrounded by a nuclear membrane. The nuclear membrance is perforated and the pores are called nuclear pores or nucleopores. The nucleoplasm possesses chromatin reticulum and 1 or 2 darkly stained bodies called nucleoli (sing-nucleolus). The chromatin reticulum is made up of DNA which is the genetic material and associated histone proteins. The nucleoplasm consists of more than 90% proteins, RNA and phospholipids.

These are cylindrical or filamentous structures found in all aerobic eukaryotic cells except the mature and old mammalian RBCs. Each mitochondrion is a double membrane-bound structure enclosing a dense fluid called matrix. The inner membrane is folded inwards to form cristae which increase the surface area. The matrix contains proteins, lipids, few ribosomes, enzymes and DNA. The cristae bear numerous stalked particles called the oxysomes.

These are cylindrical or filamentous structures found in all aerobic eukaryotic cells except the mature and old mammalian RBCs. Each mitochondrion is a double membrane bound structure enclosing a dense fluid called matrix. The inner membrane is folded inwards to form cristae which increase the surface area. The matrix contains proteins, lipids, few ribosomes, enzymes and DNA. The cristae bear numerous stalked particles called the oxysomes. Mitochondria provide site for cellular respiration resulting in the formation of energy. Hence they are termed as the storage batteries of the cells.

These are cylindrical or filamentous structures found in all aerobic eukaryotic cells except the mature and old mammalian RBCs. Each mitochondrion is a double membrane bound structure enclosing a dense fluid called matrix. The inner membrane is folded inwards to form cristae which increase the surface area. The matrix contains proteins, lipids, few ribosomes, enzymes and DNA. The cristae bear numerous stalked particles called the oxysomes. Mitochondria provide site for cellular respiration resulting in the formation of energy. Hence they are termed as the power house or storage batteries or ATP mills.

These are cylindrical or filamentous structures found in all aerobic eukaryotic cells except the mature and old mammalian RBCs. Each mitochondrion is a double membrane-bound structure enclosing a dense fluid called matrix. The inner membrane is folded inwards to form cristae which increase the surface area. The matrix contains proteins, lipids, few ribosomes, enzymes and DNA. The cristae bear numerous stalked particles called the oxysomes. Mitochondria provide site for cellular respiration resulting in the formation of energy. Hence, they are termed as the power house of the cell.

These are cylindrical or filamentous structures found in all aerobic eukaryotic cells except the mature and old mammalian RBCs. Each mitochondrion is a double membrane-bound structure enclosing a dense fluid called matrix. The inner membrane is folded inwards to form cristae which increase the surface area. The matrix contains proteins, lipids, few ribosomes, enzymes and DNA. The cristae bear numerous stalked particles called the oxysomes. Mitochondria provide site for cellular respiration resulting in the formation of energy. Hence they are termed as the power house or storage batteries or ATP mills.

These are found only in plant cells and in certain protists (e.g. Euglena). They are of two main types - chromoplasts and leucoplasts. The chromoplasts contain coloured pigment and occur in the cells exposed to sunlight. The leucoplasts are colourless and occur in the cells which are not exposed to light. They act as storage organelles and are classified on the basis of the material stored in them. Amyloplasts store carbohydrates while the aleuroplasts store proteins. The fat-storing leucoplasts are termed as elaioplasts.

These are cylindrical or filamentous structures found in all aerobic eukaryotic cells except the mature and old mammalian RBCs. Each mitochondrion is a double membrane-bound structure enclosing a dense fluid called matrix. The inner membrane is folded inwards to form cristae which increase the surface area.  Mitochondria provide site for cellular respiration resulting in the formation of energy. Hence, they are termed as the power house or storage batteries or ATP mills. The respiratory pathways in the mitochondria (i.e. TCA cycle) provides substrates for the synthesis of important biomolecules such as chlorophyll, cytochromes and steroids.

These are found only in plant cells and in certain protists (e.g. Euglena). They are of two main types - chromoplasts and leucoplasts. The chromoplasts contain coloured pigment and occur in the cells exposed to sunlight. The leucoplasts are colourless and occur in the cells not exposed to light. They act as storage organelles and are classified on the basis of the material stored in them. Amyloplasts store carbohydrates while the aleuroplasts store proteins. The fat-storing leucoplasts are termed as elaioplasts.