Answer:
chaperone proteins
Explanation:
The chaperone protein blocks the DNA binding site until a hormone binds at the hormone binding site.
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Decompose and release to the nutrients to the sources.
The micro-organisms decompose the dead and decaying organic matters. The nutrients are absorbed from soil or atmosphere by the plants. During the absorption these nutrients are depleted from the sources.
From the plants, these nutrients are transferred to the animals at different tropic levels. After the death of plants and animals are decomposed by micro-organisms and release the nutrients to the sources which finally maintain the biogeochemical cycle of nitrogen, Sulphur etc.
Answer:
Inappropriate activation of telomerase can result in cellular immortality, one of the cellular changes implicated in the development of cancer.
Explanation:
Some studies show that when telomerase activity is stimulated and a tumor suppressor gene (the p16INK4a gene) is inactivated, cellular immortalization occurs, which constitutes an important step towards the formation of a tumor.
Answer:
Muscles at the microscopic level are made of actin (thin filament) and myosin (thick filament) fibers in alternation and parallel to each other. During contraction, the fibres seem to slip against each other in opposite directions. Technically, the myosin head ‘walks’ on the actin – in an engage and release motion – with the help of ATP. Several actin and myosin fibers make up a myofibril. Each contractile unit in the myofibril is called a sarcomere – viewed as Z-discs at the microscopic level.
