A cluster of functionally-related genes that are regulated together and encoded into a single mRNA molecule is called a(n)
A. operon.
B. repressor.
C. promoter.
D. operator.
E. CAP.
A. operon.
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Answer the following statements true (T) or false (F)
1.During development, bone becomes progressively more calcified and hardened. 2.An individual skeletal muscle is separated from others by the connective tissue sheath which wraps it. 3.The basic job of skeletal muscle is to pump blood through the body. 4.When a motor neuron stimulates a muscle fiber, the fiber contracts. 5.The membrane of a muscle cell makes a deeply indented set of B tubules where a motor neuron contacts it.
Dasypeltis scabra is one of the best studied species of egg-eating snakes. Which of its following characteristics would strongly suggest that it has a built-in egg-cracker?
a. pushing the egg against the rim of the bird's nest b. pushing the egg against ventral hypophyses c. pushing the egg out of the mouth d. pushing the egg against a ribbed trachea
ETC of a prokaryote is found across the
Isopropyl alcohol wiped across a skin site can sterilize it.
Answer the following statement true (T) or false (F)