Which of the following statements is true?
a. Enzymes bond to macromolecules during condensation and detach during hydrolysis.
b. Enzymes may act on any macromolecule within the same class as its primary reactant.
c. Each type of enzyme serves as a catalyst for only one specific macromolecule.
d. Enzymes only act during dehydration synthesis, never during hydrolysis.
c. Each type of enzyme serves as a catalyst for only one specific macromolecule.
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LUCA is
A) the last universal common ancestor. B) the individual ancestor of each of the three domains. C) actually somewhat of a misnomer because it is now believed that each of the domains arose independently. D) All of the answers are correct.
Trace the flow of urine through the following structures
1) bladder 2) renal papilla 3) ureter 4) renal pelvis 5) urethra a. 4 ? 2 ? 5 ? 1 ? 3 b. 1 ? 2 ? 4 ? 3 ? 5 c. 2 ? 4 ? 3 ? 1 ? 5 d. 2 ? 1 ? 4 ? 3 ? 5 e. 4 ? 1 ? 2 ? 3 ? 5
Which statement best describes extracellular digestion?
a. Extracellular digestion is seen in sponges. b. Extracellular digestion occurs in most animals. c. Extracellular digestion must involve choanocytes. d. Extracellular digestion may take place in a tube contained inside the body.
The yeast infection (candidiasis/trichomoniasis/vaginosis) can become systemic in AIDS patients
What will be an ideal response?