In sickle cell anemia, the defective hemoglobin differs from the normal hemoglobin by
A. the color of the pigment.
B. the size of the molecule.
C. a single amino acid substitution.
D. the total number of amino acids.
E. the type of blood cell it is found in.
C. a single amino acid substitution.
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If one were to double the amount of enzyme in a reaction with an initial ?G of -5 kcal/mole, what would the ?G be?
A. -5 kcal/mole B. -10 kcal/mole C. -20 kcal/mole D. +5 kcal/mole E. +10 kcal/mole
Which of the following is NOT true of asexual
reproduction? a. It is more suitable for reproduction in animals in stable environments. b. It results in offspring that are identical to each other. c. It promotes genetic variation in successive generations. d. Fission is a type of asexual reproduction. e. The offspring are essentially genetically identical to the parents.
Which of the following proteins is found only in the RNA polymerase holoenzyme?
A) Alpha B) Beta C) Epsilon D) Sigma E) Rho
Which of the following statements concerning unsaturated fats is true?
a. they are more common in animals than plants b. they have double bonds in the carbon chains of their fatty acids c. They generally solidify at room temperature d. They contain more hydrogen than saturated fats having the same number of carbon atoms e. they have fewer fatty acid molecules per fat molecule