Question 34 Urea contains two -NH2 groups; in its formation from urea cycle, one

Question

Question 34 Urea contains two -NH2 groups; in its formation from urea cycle, one is originated from ammonium released from glutamate and glutamine and the other is originated from this amino acid: (alanine/arginine/aspartate/citruline). Question 35 The hormone epinephrine binds this type of plasma membrane receptors: Question 36 In adipose tissue, epinephrine signaling ultimately results in the activation of the following metabolic reaction or pathway (no options provided). Question 37 Name two key enzymes in the signaling of G-protein coupled receptors (spell out the names of the enzymes). Question 38 Give one reason, on molecular level, that explains the importance ofvitamin B7 (biotin) in metabolism

Explanation / Answer

34 . Cetruline.

35. beta-adrenergic receptors.

36.

37. adenylyl cyclase , phosphodiesterase.

38. normal macronutrient metabolism.
    normal energy yielding metabolism.
    the maintenance of normal skin and mucous membranes.
    the normal function of the nervous system.
    the maintenance of normal hair.
    normal psychological functions.

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