made up microtubules and protein tubulin (Figure . ). Figure . : Structure of Eukaryotic flagellum Movement Outer microtubule doublet is associated with axonemal dynein which generates force for movement.
The movement is ATP driven. The interaction between tubulin and dynein is the mechanism for the contraction of cilia and flagella. Dynein molecules uses energy from ATP to shift the adjacent microtubules. This movement bends the cilium or flagellum.
. . Cilia Figure . : Structure of Cilia & flagella Cilia (plural) are short cellular, numerous microtubule bound projections of plasma membrane.
Cilium (singular) is membrane bound structure made up of basal body, Concept Map Cell (The basic unit of life) Cell wall & Plasmamembrane Protoplasm Cell organelles Cytoplasmic inclusions Endoplasmic Reticulum transport substance synthesis lipoprotein & glycogen Chloroplast Photosynthesis Mitochondria generation of ATP Ribosomes Protein Synthesis Centrosomes give rise spindle fiber in animal cells Vacuoles facilitate transport of ions & materials in plant cell Microbodies Peroxisomes Glyoxysomes Golgi bodies Packaging & Secretion Excretory substance glycosides, tannins & gums Storage Substance carbohydrates, fats & proteins Secretory substance Pigments & Enzymes Cytoplasm Nucleus DNA RNA Proteins of DNA and associated proteins. Bacterial flagella are made up of helical polymers of a protein called flagellin . Proton motive force are involved in flagellar rotation. In Eukaryotes Evaluation .
The two subunits of ribosomes remain united at critical ion level of a. Magnesium b. Calcium c. Sodium d.
Ferrous . Sequences of which of the following is used to know the phylogeny. a. mRNA b.
rRNA c. tRNA d. Hn RNA . Many cells function properly and divide mitotically even though they do not have.
a. Plasma membrane b. cytoskeleton c. mitochondria d.
Plastids . Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other. a. Neither lipid nor proteins can flip-flop b.
Both lipid and proteins can flip flop c. While lipids can rarely flip-flop proteins cannot d. While proteins can flip-flop lipids