13)what structures are involved in the formation of chromatin?
14)where is nucleus located in a cell?
15)what is the term used for subcellular structures having characteristic forms and functoins?
16)what is cytosal?
17)how is food vacuole formed?
18)what is the name of membrane surrounding sap vacuole of a plant cell?
19)what is the name of fluid contained in the vacuole of a plant cell?
20)what is dictyosome?
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13.In general terms, there are three levels of chromatin organization: DNA wraps around histone proteins forming nucleosomes; the "beads on a string" structure (euchromatin). Multiple histones wrap into a 30 nm fibre consisting of nucleosome arrays in their most compact form (heterochromatin).
14.The location of the nucleus can vary, depending on the type of the cell. The usual location of the nucleus is at the centre (animal cells), but it can also be at the periphery (plant cells). The reason for that is the vacuole that takes the central position in the plant cell.
15.An organelle is a subcellular structure that has a specific function. The activities of cells depends on the activities of subcellular structures within the cell (subcellular structures include organelles, the plasma membrane).
16.the aqueous component of the cytoplasm of a cell, within which various organelles and particles are suspended.
17.Food vacuoles form when the food is pushed toward the cell where the membrane bends inward. As the food pushes against the membrane, the membrane stretches inward until the food particle is completely in the cell, where the membrane then pinches off, forming a vacuole. This form of eating is called phagocytosis.
18. Gk plastós formed, molded) and filled with cell sap. Also called the vacuolar membrane, the tonoplast is the cytoplasmic membrane surrounding a vacuole, separating the vacuolar contents from the cell's cytoplasm.
19.A vacuole is a membrane-enclosed fluid filled sac. It is present inside the cells of plants. The name vacuole has originated from the Latin word vacuus meaning 'empty'. It serves as a storehouse for the plant cell to act as a storage place for excess nutrients.
20.Dictyosomes are stacks of flat, membrane-bound cavities (cisternae) that together comprise the Golgi apparatus. Within the dictyosomes, proteins are stored, modified, sorted, and packed into vesicles (which are then closed off as Golgi vesicles) for further transport.
14.The location of the nucleus can vary, depending on the type of the cell. The usual location of the nucleus is at the centre (animal cells), but it can also be at the periphery (plant cells). The reason for that is the vacuole that takes the central position in the plant cell.
15.An organelle is a subcellular structure that has a specific function. The activities of cells depends on the activities of subcellular structures within the cell (subcellular structures include organelles, the plasma membrane).
16.the aqueous component of the cytoplasm of a cell, within which various organelles and particles are suspended.
17.Food vacuoles form when the food is pushed toward the cell where the membrane bends inward. As the food pushes against the membrane, the membrane stretches inward until the food particle is completely in the cell, where the membrane then pinches off, forming a vacuole. This form of eating is called phagocytosis.
18. Gk plastós formed, molded) and filled with cell sap. Also called the vacuolar membrane, the tonoplast is the cytoplasmic membrane surrounding a vacuole, separating the vacuolar contents from the cell's cytoplasm.
19.A vacuole is a membrane-enclosed fluid filled sac. It is present inside the cells of plants. The name vacuole has originated from the Latin word vacuus meaning 'empty'. It serves as a storehouse for the plant cell to act as a storage place for excess nutrients.
20.Dictyosomes are stacks of flat, membrane-bound cavities (cisternae) that together comprise the Golgi apparatus. Within the dictyosomes, proteins are stored, modified, sorted, and packed into vesicles (which are then closed off as Golgi vesicles) for further transport.
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