Blood types A, B, AB, and O are determined by ________
A) the capacity of the blood to respond to infections
B) the capacity of the blood to respond to transfusions
C) carbohydrates on the surface of the white blood cells
D) carbohydrates on the surface of the red blood cells
D
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The rumen is an ________ habitat that depends on ________ to digest cellulose for ruminant animals
A) aerobic / cellulolytic fungi B) aerobic / cellulolytic and fermentative bacteria C) anaerobic / methanogens D) anaerobic / cellulolytic and fermentative bacteria
During the stringent response, ppGpp-regulated genes for amino acid biosynthesis have a(n) ________-rich promoter, thus forming a ________ open initiation complex.
A. GC-rich; more stable B. AT-rich; less stable C. GC-rich; less stable D. AT-rich; more stable
The first task you are assigned in your summer laboratory job is to prepare a concentrated NaOH stock solution. The molecular weight of NaOH is 40
How many grams of solid NaOH will you need to weigh out to obtain a 500 mL solution that has a concentration of 10 M? (a) 800 g (b) 200 g (c) 400 g (d) 160 g
Which of the following can be used as electron acceptors during anaerobic respiration?
A. Carbon dioxide B. Sulfate C. Nitrate D. All of the choices are correct.