An anabolic reaction usually
A) yields energy.
B) requires energy.
C) involves no change in energy.
D) is degradative, regardless of energy change.
E) decreases molecular order.
Answer: B
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A deletion of a particular stretch of chromosome 15 can cause either Prader-Willi syndrome or Angelman syndrome, depending on
A. the parental origin of the normal and deleted chromosome. B. whether or not the region is methylated properly. C. whether a translocation event has occurred. D. whether a nondisjunction event has occurred.
The hydrogen-bond lattice causes water to have an unusually ____ specific heat, an unusually ____ heat of
vaporization and an unusually ____ density in solid form.
a. high; high; high b. low; low; low c. high; low; high d. high; high; low e. low; low; high
A pregnant mouse is exposed to high levels of a chemical. many of the mice in her little are deformed, but when they are interbred with each other, all their offspring are normal. Which TWO of the following statements could explain these results?
(a) In the deformed mice, somatic cells but not germ cells were mutated. (b) The original mouse's germ cells were mutated. (c) In the deformed mice, germ cells but not somatic cells were mutated. (d) The toxic chemical affects development but is not mutagenic.
How can the same first messenger evoke different responses in different target cells?
a) it depends on the tissue cAMP binds to b) it depends on the specific proteins phosphorylated by PKA c) none of the choices is correct d) it depends on the ligand cAMP binds to