Two chains of DNA must run in __________ direction(s) and must be __________ if they are to bond
with each other.
a. the same; uncomplementary
b. opposite; uncomplementary
c. parallel; uncomplementary
d. parallel; complementary
e. antiparallel; complementary
E
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The role of an interneuron is to:
A. relay information from sensory to motor neurons. B. convey information from the internal environment of an organism. C. stimulate a muscle to contract. D. maintain homeostasis.
Activated Ras ____
a. activates MAP kinase (MAP K) b. opens a calcium channel c. triggers gene transcription d. binds DNA e. triggers the secretion of growth factors
The seed plants became dominant during the late ___ when the climate became ___
a. Cambrian; wetter b. Carboniferous; drier c. Carboniferous; wetter d. Cretaceous; drier e. Cretaceous; wetter
Even if you quit smoking, the damage to your lungs is already done and they will not return to normal.
Answer the following statement true (T) or false (F)