All living things contain six key elements (or atoms). Which element is not part of this list?
A. carbon
B. nitrogen
C. hydrogen
D. helium
E. phosphorus
F. sulfur
Answer: D
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A typical cell contains "powerhouses," which is another name for ____
a. DNA b. ribosomes c. mitochondria d. electron transport chains e. RNA
One reason protein needs increase during pregnancy is to:
a. provide extra plasma proteins. b. spare carbohydrates for use as energy. c. allow for adequate fat storage to support lactation. d. ensure sufficient essential fatty acids.
What percentage of salt is composed of chloride?
A) 10% B) 80% C) 60% D) 50%
Which of the following children is most likely to be iron deficient?
a. A white male who plays soccer. b. A Mexican–American male living above the poverty threshold. c. A Native American female from a middle-class family. d. An African-American female living below the poverty threshold.