Which of the following statements is correct regarding RNA?
A) rRNA is always attached to the rough ER.
B) If the base sequence of DNA is ATTGCA, the messenger RNA template will be UCCAGU.
C) There is exactly one specific type of mRNA for each amino acid.
D) Messenger RNA, transfer RNA, and ribosomal RNA play a role in protein synthesis.
D
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Which of the following describes a second-degree burn?
A. It involves only the epidermis. B. It involves the epidermis, part of the dermis, and may produce blisters. C. It indicates the complete destruction of both the epidermis and dermis. D. It probably will require a skin graft. E. The skin will not regenerate.
Which of the following is accomplished by chewing?
a. grinding and breaking up food b. mixing food with saliva to facilitate swallowing c. reflexively increasing salivary, gastric, pancreatic, and bile secretion d. two of these answers. e. all of these answers.
This is the most common type of cell in connective tissue proper:
a. keratinocyte b. osteocyte c. fibroblasts d. red blood cell
Gas, nutrient, and waste exchange occur in the
A. veins. B. arteries. C. arterioles. D. venules. E. capillaries.