Maintaining the fluidity of membrane D. Red blood cells in the blood repel each other due to: A. Mutation in band 3 protein C. Maintain the position of trans-membrane proteins in the membrane 14. Cryo-sectioning and electron microscopy B. Consider the following statements: A.
Plasma membrane is composed of equal numbers of phospholipids, proteins, and carbohydrates. Plasma membrane is bilayers of phospholipids with associated proteins and carbohydrates 5. Karyotheca is Nucleus Nucleolus Nuclear membrane Nuclear pore 9. Cholesterol is absent in bacterial plasma membrane Which of the above statements are correct? Surface tension of plasma membrane is less than pure lipid structures This observation leads to the discovery of proteins in the membrane. The nucleus is composed of a nuclear membrane, nucleolus and chromosomes.
Plasma membrane is composed of two layers—one layer of phospholipids and one layer of proteins. Adhesion of cells to each other and to the extracellular matrix 3. Which of the following is possessed only by some bacteria, not by eukaryotes? Increase in phospholipid content in the membrane D. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. The flip-flop of phospholipids to the opposite leaflet 9. Integral proteins of plasma membrane C.
It is the control centre of the activities of the cell. A person having the enzyme which adds N-acetylgalactosamine to the end of glycolipids which determine the blood group. Outer leaflet of plasma membrane They forms the glycocalyx of the cell 8. Mitochondrial outer membrane The only other place where cardiolipin can be found is the plasma membrane of bacteria. The cell was first discovered by Robert Hooke, until then very little was known about the cell. Anchoring of the cytoskeleton; 5. Freeze fracture analysis and electron microscopy 19.
Cannot be predicted, it varies according to cell types 8. Plasma membrane is bilayers of proteins with associated lipids and carbohydrates. Presence of cardiolipin in the outer membrane of mitochondria is one of the strongest evidence for endosymbiont theory for the origin of mitochondria in eukaryotes. A major function of Golgi bodies or Dictyosomes is in modification of proteins in fermentation in light independent photosynthesis for isolation of electron transport systems 4. Surface tension of plasma membrane is less than pure lipid structures C.
Which of the following does not occur within mitochondria? Humans have inhabited this planet for only the last 2. Cholesterol provide stiffness to membrane D. All of these methods 19. Surface tension of plasma membrane and pure lipid structures are same D. Enzymes such as desaturase, phospholipase and acetyltransferase are very essential for maintaining the integrity of plasma membranes.
Cilia Flagella Capsule Centriole 3. Maintains the semi-permeability of membrane C. Plasma membrane do not have surface tension 4. Cells are assembled to make the body of an organism. Peripheral proteins of plasma membrane 20. Cell and nuclear division; 8.
Cell wall of plant cell contains pit fields known as Mitochondria Golgi bodies Plasma membrane Plasmodesmata 6. They lack nucleus and other membrane structures C. Always face to the lumen of cells D. Which of the following statements best describes the chemical composition of plasma membrane? The reduction in the surface tension of membrane than pure lipid structures is due the presence of proteins in the plasma membrane. A single-celled organism like the amoeba respires, captures and digests food, grows, excretes and reproduces.
Always face inward to the non-polar portion of membrane B. Plant cells have a big central vacuole while animal cells have small vacuoles. Which of the following statement is true regarding the surface tension of plasma membrane? Cell - Structure and Function Class 8 Notes A cell is the basic structural unit of an organism. Maintaining the fluidity of membrane 14. Cholesterol is absent in plasma membrane of plants E.
Which of the following does not surrounded by a double membrane in eukaryotes? Increase in unsaturated fatty acids in the membrane C. The blood group of the person will be A. In class 8 science chapter 8, the various parts of a cell and their functions along with the comparison of plant and animal cells are discussed. Mutation in glycophorin A D. Outer leaflet of plasma membrane B. Assisting in chromosome segregation Functions of plasma membrane: 1. Directed to all sides in the membrane randomly 12.