Why did the pGLO+ cells glow on the LB/Amp/Ara plates but not on the LB/Amp plate?
A) Arabinose is a positive control
B) They need the arabinose in order to turn on GFP expression
C) The colonies could have glowed on either plate if they were successfully transformed
D) Arabinose is a selective marker
B) They need the arabinose in order to turn on GFP expression
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The 16S rRNA sequence is an approximately 1,500 bp linear strand of single stranded RNA
Indicate whether the statement is true or false.
A mutation in the laci gene that makes the repressor unable to bind lactose will result in:
A: increased synthesis of b-galactocidase only when glucose is low. B: repression of b-galactocidase synthesis under all growth conditions. C: constitutive (constant) synthesis of some b-galactocidase. D: all of the above
When glucose is being used up and not replaced from food intake, the blood sugar level can be maintained by synthesizing glucose from smaller molecules such as pyruvate or lactate. This process is called gluconeogenesis
Which organ is principally responsible for supplying glucose to the rest of the body when glucose reserves are low? (a) liver (b) pancreas (c) spleen (d) gall bladder
Consider two cells with the same volume but with very different surface areas due to differences in their shapes. The cell with the larger surface area is likely to __________.
Fill in the blank(s) with the appropriate word(s).