What does it mean to say a system has a ?G equal to zero?
A) The system does not release or absorb heat.
B) The system is perfectly ordered (no entropy).
C) The total amount of potential energy in the system is zero.
D) The system is at equilibrium.
Answer: D
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Enzymes don't change the ?G of a reaction
Indicate whether the statement is true or false.
A paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive
isotope potassium-40, which has a half-life of 1.3 billion years. The rock now contains 3 mg of the isotope. About how old is the rock?
a. 2.6 billion years b. 5.2 billion years c. 1.3 billion years d. 0.3 billion years e. 0.4 billion years
What type of cells respond to a particular hormone?
A) glandular B) target C) receptive D) endocrine
Which component of the influenza virus is required for the initial attachment to human respiratory epithelial cells?
a. capsid protein b. hemagglutinin c. phospholipid d. matrix protein