In metabolic pathways that are regulated by feedback inhibition, the _____ inhibits the activity of the _____
a. product; first enzyme
b. first enzyme; product
c. second enzyme; first enzyme
d. last enzyme; first enzyme
e. reactant; product
a
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How does an accretion disk around a neutron star differ from an accretion disk around a white dwarf?
A) The accretion disk around a neutron star is made mostly of helium while the accretion disk around a white dwarf is made mostly of hydrogen. B) The accretion disk around a neutron star is more likely to give birth to planets. C) The accretion disk around a neutron star is much hotter and emits higher-energy radiation. D) The accretion disk around a neutron star always contains much more mass.
Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Angular momentum is conserved
a. True b. False Indicate whether the statement is true or false
A 15-?F capacitor is charged to 40 V and then connected across an initially uncharged 25-?F capacitor. What is the final potential difference across the 25-?F capacitor?
a. 12 V b. 18 V c. 15 V d. 21 V e. 24 V
The type of detector that uses liquid hydrogen is a
A) Geiger tube. B) spark chamber. C) scintillation counter. D) cloud chamber. E) bubble chamber.