Enzymes work with at least three mechanisms. Which of the following is not a mechanism by which enzymes function?
a. putting reactants in close proximity to each other
b. altering the free energy (?G) of the reaction
c. altering the immediate environment of the reactants to promote reactant interactions
d. orienting the reactants so they are positioned to favor the transition state
B
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The different seasons of the year are due to the
A. tilt of Earth's axis as it travels around the sun. B. distance from Earth to the sun. C. rotation of Earth on its axis. D. rotation of the moon around Earth. E. gravitational pull of the moon as it travels around Earth.
A second-site mutation that compensates for the mutation in one gene by mutating a second gene and restoring the wild-type phenotype is also known as a ________ mutation
Fill in the blank(s) with correct word
Not every piece of DNA is used in a cell to make proteins because
A. some of the DNA is used for regulation of gene expression. B. not all genes are needed in every cell. C. some sequences are needed to stabilize the end of the chromosomes. D. All of the choices are correct.
Match the letter of each example from childbirth to the appropriate component of a positive feedback loop.A. Pituitary gland secretes oxytocin, which acts on the uterusB. Uterine contractions increaseC. Fetus is pushed against uterine openingD. Receptors detect stretchE. Brain receives and compares stretch informationIntegrating Center
What will be an ideal response?