What is the correct dental formula for an adult human?
A. 2133 / 2133
B. 2123 / 2123
C. 2103 / 2103
D. 2122 / 2122
Answer: Option B
Solution (By JKSSB Mock Tests)
The dental formula represents the number of each type of tooth in one half of the upper and lower jaws. For an adult human, it is 2123 / 2123. This means: 2 Incisors, 1 Canine, 2 Premolars, and 3 Molars in each quadrant (upper right, upper left, lower right, lower left), totaling 32 teeth.
Explanation:
Alexander Fleming discovered penicillin in 1928 from the mold Penicillium notatum (later renamed P. chrysogenum). Aspergillus niger is used for citric acid production, Saccharomyces is yeast, Rhizopus is a bread mold. Penicillin was the first true antibiotic and its mass production during WWII saved countless lives. It inhibits bacterial cell wall synthesis.
Explanation:
Guttation is the exudation of water droplets containing dissolved minerals from hydathodes at leaf margins, driven by root pressure when transpiration is low. Transpiration is vapor loss, bleeding is sap from cut tissue.
Explanation:
Phagocytosis, or 'cell eating', is a type of endocytosis where the cell membrane engulfs large solid particles, such as bacteria or cellular debris, forming a vesicle called a phagosome. This phagosome then fuses with a lysosome for digestion. It is primarily performed by specialized cells like macrophages and neutrophils.
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