The catabolite repression system in E. coli essentially represses the lac operon when glucose is present. What evolutionary advantage would favor evolution of such a system?
What will be an ideal response?
Glucose can enter glycolysis "as is," whereas lactose must first be split into glucose and galactose. To do so, the energy-requiring synthesis of ?-galactosidase is required. It is more energy efficient to burn glucose than lactose.
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Camptodactyly causes ____
a. bent, immobile little fingers b. breathing difficulties c. loose joints d. muscle deterioration e. near-sightedness
Which blood type is the universal donor?
1.A+ 2.B 3.AB+ 4.AB 5.O
Meiosis and germination of spores is indicated
by letter a. A. b. B. c. C. d. D. e. E.
What might happen if a protein has a change in one amino acid?
A) The amino acid chain folds incorrectly. B) The protein can no longer function properly. C) The protein has a new shape. D) All of these happen.