Rosalind Franklin used which technique to determine many of the physical characteristics of DNA?
A) transformation
B) X-ray diffraction
C) transmission electron microscopy
D) density-gradient centrifugation
Ans: B) X-ray diffraction
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When culturing a chemoorganoheterophic bacterium, what outcome is LEAST likely to occur if ammonia and phosphate are provided at equal concentrations?
A) Cells require much less P to grow than N, so extra P will be used for ATP synthesis and result in a faster growth rate. B) Cells will never consume all of the phosphate, because N is needed in higher quantities than P. C) The final biomass of cells will be no different than if only 50% of the phosphate was provided. D) The bacteria will import all of the ammonia to use for biosynthetic pathways.
The environment can impact the phenotype controlled by polygenic inheritance
Indicate whether the statement is true or false.
The stalk of Caulobacter increases in the surface area of the cell, which facilitates absorption of nutrients from nutrient poor environments.
Answer the following statement true (T) or false (F)
The phenotype of an organism is its set of (genes/traits/chromosomes)
What will be an ideal response?