Memory cells may take the form of
A. B cells.
B. T cytotoxic cells.
C. T helper cells.
D. All of the choices are correct.
D
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Which of these best reflects the following relationship: monosaccharide versus polysaccharide?
A) glucose versus glycogen B) glucose versus fructose C) 1,4-glycosidic linkage versus 1,6-glycosidic linkage D) ?-linkage versus ?-linkage
Alternation of generations means:
A. One phase of the life cycle takes place on land and the other in water. B. One phase of the life cycle is photosynthetic and the other is heterotrophic. C. One phase of the life cycle is diploid and the other is haploid. D. One phase of the life cycle is unicellular and the other is multicellular. E. One phase of the life cycle is motile and the other is stationary.
When certain bodies of water develop regions known as "dead zones" it often means that:
A. Oxygen has been depleted. B. Carbon dioxide is not available. C. Nitrogen has become limited. D. Phosphorus has killed animals. E. Plant life no longer can survive.
After ATP donates a phosphate group in a couple reaction, it becomes ADP. The ADP can be converted back to ATP in a(an) ____ reaction.
A. hydrolysis B. endergonic C. catabolic D. equilibrium E. exergonic