Exam(s) MCQ Deck Flashcards
In coordination chemistry the donor atom of a ligand is___________
the atom in the ligand that shares an electron pair with the metal
The biological functions of carbonic anhydrase and alcohol dehydrogenase, respectively are__________.
Hydration of CO2 to bicarbonates, alcohols, and aldehydes
The active sites of carboxypeptidase A contain _______ and catalyze ________ .
Zn(II); the hydrolysis peptide bonds
Which of the following represents the correct set of essential elements?
Fe, Na, K, Zn
The amino acid side chain with high affinity for Ca2+ and Cu2+ in metallo-proteins is __________.
Carboxylate from glutamate for Ca2+ and imidazole from histidine for Cu2+
Which biologically active species control important cellular processes such as hydrolysis?
Metallo-proteins
How is acid-base catalysis accomplished in biological processes?
Through metal ion built-in protein structures
The magnesium-containing 1,5-biphosphate enzyme (ribusco enzyme) is of great interest because_________.
It removes CO2 gas in the atmosphere and fixing it into other products
What are Arginases?
Arginases are Mn(II) containing metalloenzymes that catalyze the hydrolysis of nitrogen-containing proteins to produce urea as the byproduct.
Zinc finger motifs are particular characteristics of proteins that function as
Gene regulators
Metallothioneins are _________
cysteine-containing ligands that bind mainly soft metal ions
In biological systems, the metal ion involved in O2 transport besides Fe is___________.
Cu (copper)
Which biomolecules are prone to the irreversible oxidative damage caused by reactive oxygen species (ROS)_________.
DNA, Lipids, Proteins, Carbohydrates
The number of O2 molecules that hemoglobin can transport is ___________.
Four
The amino acid side chains that act as ligands for the binding of Fe3+ in transferrin are ___________.
Tyrosine, histidine, and aspartate
