Dry heat methods usually require lower temperatures and shorter exposure times than moist heat methods to achieve the same degree of killing because of the drying effects of this form of heat.
Answer the following statement true (T) or false (F)
False
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The human immunodeficiency virus (HIV) only affects a specific class of cells in the immune system called helper T cells, and not other types of T cells. Which is the best explanation for this observation?
A. Only helper T cells have the correct receptor on their cell surface. B. HIV can only be released from helper T cells. C. Only helper T cells have reverse transcriptase. D. HIV can only replicate inside of helper T cells. E. The helper T cells are not necessary for the immune system to fight viral infections.
While researching the effects of light on chlorophyll synthesis in sorghum, you find that brief pulses of red light stimulates the synthesis of chlorophyll a and b. This would suggest that chlorophyll synthesis is directed by the Pr form of phytochrome.
Answer the following statement true (T) or false (F)
Which of the following statements about anaerobic respiration is FALSE?
A) It yields lower amounts of ATP when compared to aerobic respiration. B) The complete Kreb's cycle is utilized. C) It involves the reduction of an organic final electron acceptor. D) It generates ATP. E) It requires cytochromes.
Compared with prokaryotic chromosomes, eukaryotic chromosomes are ________
A) small, mainly organized in single-gene transcription units with introns B) large, mainly organized in single-gene transcription units without introns C) large, linear, less densely packed with protein-coding genes, mainly organized in single-gene units with introns D) large, mainly organized in polygenic transcription units without introns E) small, mainly organized in polygenic transcription units without introns