Light suppresses secretion of __________ by the pineal gland in the brain. Fill in the blank(s) with the appropriate word(s)
melatonin
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Which of the following statements about enzymes is FALSE?
A. The active site of the enzyme is where the chemical reaction takes place. B. The substrate binds to the enzyme with low affinity. C. The enzyme undergoes a conformational change that brings substrates closer together in an induced fit. D. The optimal activity of an enzyme occurs over a narrow temperature range. E. The optimal activity of an enzyme occurs within a narrow pH range.
If a eukaryotic organism does not depend on fatty acids as an energy source, one would expect to find ?-oxidation activity associated with which of the following organelles?
A) cytoplasm B) mitochondrion C) peroxisome D) ribosome E) cell membrane
Hydrological alterations threaten freshwater biodiversity in many ways. Select the exception
a. changes in flow rates b. changes in life histories of aquatic species c. changes in connectivity d. changes in habitat that facilitate the introduction and success of non-native species e. changes in salinity
What is the probability that two lizards that are heterozygous for stripes on their tails (Ss) will produce
an offspring that is homozygous for no stripes (ss)? a. 1 b. 1/2 c. 1/4 d. 1/8 e. 0