In the periodic table, the value that refers to the number of protons and neutrons is.
A. atomic molarity
B. atomic mass
C. molecular number
D. molecular molarity
Answer: B
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In the accompanying figure, why does the curve sharply drop after approximately 45°C instead of mirroring the slope
of the line going from 0-40°C?
a. At high temperatures, the reactions proceed so quickly that enzymes are no longer helpful or required. b. This is true of all catalysts and is not due to any special features of enzymes.
c. The kinetic energy of the reactants is so great that it destabilizes the enzyme and diminishes the enzyme's activity. d. The kinetic energy of the reactants is lower than that of the products, forcing a change in enzyme activity. e. The enzyme begins to denature above a certain temperature, eliminating all catalytic activity of the protein.
When does lactase production begin to decline in humans?
a. Age 55 b. Age 5 c. Age 25 d. Never e. Age 46
The use of vaginal inserts of Lactobacillus to restore a healthy acidic environment is an example of ________.
A. probiotics B. riboswitches C. phytobiotics D. prebiotics E. lantibiotics
Two modular elements that appear as consensus sequences upstream from RNA polymerase II transcription start sites are ________
A) enhancers and telomeres B) TATA and CAAT C) rDNA and nucleolar organizers D) TTAA and CCTT E) microsatellites and transposons