Cardiac muscle cells are ____
a. involuntary
b. spindle-shaped
c. multinucleated
d. slow contracting
e. found in the walls of blood cells
ANSWER: a
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Which of the following statements about genomic libraries and cDNA libraries is TRUE?
A. A cDNA library is derived from chromosomal DNA. B. A genomic library is derived from mRNA. C. A genomic library is made using reverse transcriptase. D. A genomic library is derived from mRNA and is made using reverse transcriptase. E. A cDNA library is derived from mRNA and is made using reverse transcriptase.
Which substance is hydrophobic?
a. canola oil b. sodium chloride c. sugar d. water e. the potassium ion
At one time it was thought to be impossible to operate within the body cavities. Then the Canadian doctor, William Beaumont, operated on a patient with a gunshot wound to the stomach. A few decades later came breakthroughs in heart operations and transplants. The 1990s was called the decade of the brain because of the extensive research being done on how the brain functions. Name the body cavities associated with these breakthroughs in order.
A. abdominal-dorsal-thoracic. B. abdominal-thoracic-dorsal. C. thoracic-dorsal-abdominal. D. thoracic-abdominal-dorsal. E. dorsal-thoracic-abdominal.
Which of the following is true of iron sources and functions?
a. The only dietary sources of iron are meat, fish, and poultry. b. Myoglobin and hemoglobin contain equal amounts of iron. c. Heme iron is always better absorbed than non-heme iron. d. The body cannot recycle iron for other uses.