OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ribosomes, nucleoid and Golgi apparatus
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Ribosomes, mitochondria and pili
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Cell wall, plasma membrane and nuclear membrane
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Pili, flagella and cytoplasm
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Detailed explanation-1: -A typical Escherichia coli cell is propelled by a bundle composed of multiple flagella. Each flagellum is controlled by a rotary motor that can switch between clockwise (CW) and counter-clockwise (CCW) rotation. When flagella on a cell rotate CCW, the cell swims along an approximately straight path called a ‘run’.
Detailed explanation-2: -The E. coli flagellum consists of six components: a basal body (including MS ring, P ring, and L ring), a reversible rotary motor, a switch, a short proximal hook, a long helical filament, and a type III flagellar secretion system (T3FSS) as the export apparatus (Fig.
Detailed explanation-3: -The rate of protein diffusion in bacterial cytoplasm may constrain a variety of cellular functions and limit the rates of many biochemical reactions in vivo. In this paper, we report noninvasive measurements of the apparent diffusion coefficient of green fluorescent protein (GFP) in the cytoplasm of Escherichia coli.