A small calcium binding protein that modifies the activity of many enzymes and other proteins in response to changes of Ca2+ concentration, is known as: A. Cycline B.
Which of the following substances acts to increase the release of Ca2+ from endoplasmic reticulum ? A. Inositol triphosphate B. Parathyroid hormone C. 1,25 dihydroxy cholecalciferol D. Diacylglycerol
Which of the following is a membrane bound enzyme that catalyzes the formation of cyclic AMP from ATP? A. Tyrosine Kinase B. Polymerase C. ATP synthase D. Adenylate
Proteins targeted for destruction in eukaryotes are covalently linked to : A. Clathrin B. Pepsin c. Laminin D. Ubiquitin Correct answer : D. Ubiquitin Ubiquitin targets proteins (newly
Which of the following group of proteins assist in the folding of other proteins? A. Proteases B. Proteosomes C. Templates D. Chaperones Correct answer : D. Chaperones Chaperones
The transmembrane region of protein is likely to have A. A stretch of hydrophilic amino acids B. A stretch of hydrophobic amino acids C. A disulphide loop D.
Which of the following can be a homologous substitution for valine in hemoglobin? A. Isoleucine B. Glutamic acid C. Phenylalanine D. Lysine Correct answer : B. Glutamic acid
An enzyme that makes a double stranded DNA copy from a single stranded RNA template molecule is known as: A. DNA polymerase B. RNA polymerase C. Reverse transcriptase
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