Lyophilization of bacteria is a kind of cryopreservation of bacteria
a. true
b. false
Ans: a. true
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The ocular (eyepiece) lens magnifies the image?
A. 10-fold B. 5-fold C. 15-fold D. 20-fold E. 25-fold
In prokaryotes, gene expression is regulated at the level of: (Select all correct choices)
A. transcription. B. translation. C. post-translational modification of RNA and proteins.
About 250 million years ago Earth’s continents merged into one supercontinent called ____
a. Nazca b. Eurasia c. Laurasia d. Gondwana e. Pangaea
The fact that the earth does not go up in flames in spite of the richness of oxygen in our environment is related to
which of the following concepts?
a. the activation energy needed to break bonds b. the fact that reactants always have less energy than products c. the first law of thermodynamics d. the second law of thermodynamics e. the abundance of water in our atmosphere which inhibits combustion