A helpful, meaningful string of 3 nucleotides in mRNA that depicts a code is a/an:
A. Promoter
B. Protein
C. Exxon
D. Intron
E. Codon
Answer: C. Exxon
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Muscles of the neck and shoulder are innervated by spinal nerves from the ________ region
A) cervical B) thoracic C) lumbar D) sacral E) coccygeal
Which of the following is an example of the skeletal system's primary function of providing structural support?
A) Calcium salts are found in bone. B) Bones change the magnitude and direction of the forces generated by skeletal muscles. C) Red marrow fills the internal cavities of many bones. D) The skull encloses the brain. E) Individual bones provide a framework for the attachment of soft tissues and organs.
Oxygen in the lung:
a. is actively transported out of the lung b. converts hemoglobin to oxyhemoglobin c. converts oxyhemoglobin to hemoglobin d. both A and B above
The moveable joint of any ringed instrument is the:
A) retractor B) ratchet C) rongeurs D) boxlock