Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other

Kinases refer to the group of enzymes which catalyze the transfer of phosphate group to their substrate. The phosphate group is usually transferred from high energy phosphate donating molecules such as ATP and GTP.

Addition of phosphate group may activate some proteins or enzymes while it may deactivate other enzymes.

For example, CDK-activating kinase adds phosphate groups to the CDK in order to activate them.

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.