#Question id: 1225
#XL - Q Biochemistry
The dissociation constant Kd for a receptor-ligand complex is
a. a measure of the affinity of the receptor for the ligand.
b. the concentration of the ligand at which half of the receptors contain bound ligand.
c. a measure of the time it takes for a ligand to be converted to a product.
d. equal to koff/kon
#Question id: 4605
#XL - S Microbiology
Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?
#Question id: 2063
#XL - S Microbiology
#Question id: 11582
#XL - T Zoology
Following a stressful stimulus, the fight-or-flight response will cause ________.
#Question id: 4126
#XL - T Zoology
Which one of the following is true about the genetic code?