I believe option B would be the correct choice because, without a catalyst, the reaction will be either too slow or will not happen at all as it would not acquire a fitting activation energy for the reaction.
If you would like to know why the other options are incorrect, please read on:
Option A is incorrect because since proteins are specific in nature, so other protein cannot be replaced, for some other chemical reaction.
Option C is not correct it is a genetic defect that the protein does not form, and all cells are genetically identical, a reaction cannot take place in any parts of the body.
And finally, option D would be wrong because if a forward reaction does not take place, a backwards reaction will not occur.
I hope this answer has helped, and I apologise if somehow this answer finds itself to be incorrect. Good luck on your quiz or homework. :)
Explanation:
Surprisingly, until recently, not much was known about the genes that control melanin production. 6 were known (MC1R, TYR, OCA2, SLC24A5, MATP and ASIP) and 17 more have been recently identified (DTNBP1, GPR143, HPS3, KITGL, MLPH, MYO5A, MYO7A, SLC45A2, TYRP1, ERCC6, GNAS, HERC2, IRF4, OBSCN, SKC24A5, TPNC2 and MITF), all of them directly or indirectly related to the process of melanin formation and distribution. Since there are so many different genes, if we count all the possible alterations, many different color variants can be produced.
Answer:
Quadrupedal refers to organisms that walk or move using four limbs. The word quadrupedal has the Latin roots "quad" meaning four and "ped" meaning foot. Bipedal refers to organisms that walk or move using two limbs. Bipedal has the Latin root "bi" meaning two, and again "ped" meaning foot.
Terrestrial and Aquatic refers to the type of organisms and their environment. Terrestrial organisms are organisms that live on dry land. Aquatic organisms are organisms that live in bodies of water, such as oceans, rivers, and lakes.
Sessile and Motile refers to mobility of organisms. Sessile organisms are organisms that aren't mobile and are fixed in place. Sessile organisms include barnacles and mature sea sponges. They attach to objects in the sea and do not move by themselves. Motile organisms are organisms that are capable of moving. Motile organisms include humans, fish, birds, etc. All these organisms have body structures (bones, muscles, nerves) that allow them to move using energy (ATP from food).
