Viruses that invade bacteria are called ____
Fill in the blank with the appropriate word.
bacteriophages
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What macronutrient is rarely deficient?
a. carbon b. hydrogen c. oxygen d. zinc e. carbon dioxide
A mutation in which one of the ADH enzymes is overactive causes ________
a. the carrier to be unlikely to become an alcoholic b. all of the choices c. acetaldehyde to accumulate d. the carrier to become flushed and ill after drinking alcohol
Which blood cell type is correctly matched to its function?
A. monocytes—defense against microorganisms B. erythrocytes—immunity C. leukocytes—blood clotting D. platelets—hematopoiesis E. leukocytes—oxygen transport
Which of the following is an obstacle to crystallization and structural analysis of membrane proteins?
a) membrane proteins are unstable in detergent-containing solutions b) all of the choices are obstacles c) membrane proteins are present in low numbers in the cell d) membrane proteins are prone to aggregation