LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the role of protein kinase in a signal transduction pathway?
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activates a molecule by adding a phosphate to the target molecule
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activates a molecule by removing a phosphate from the target molecule
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deactivate a molecule by removing a phosphate from the target molecule
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deactivate a molecule by adding a phosphate to the target molecule
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Explanation:
Detailed explanation-1: -Protein kinases and phosphatases are enzymes catalysing the transfer of phosphate between their substrates. A protein kinase catalyses the transfer of -phosphate from ATP (or GTP) to its protein substrates while a protein phosphatase catalyses the transfer of the phosphate from a phosphoprotein to a water molecule.
Detailed explanation-2: -Protein kinases are an important class of intracellular enzymes that play a crucial role in most signal transduction cascades, from controlling cell growth and proliferation to the initiation and regulation of immunological responses.
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