Which of these statements are false? (Choose all that apply)
> Always use a test tube rack when transporting test tubes.
> It is ok to pick up or handle a test tube by the cap.
> Sterilize loops and needles in the incinerator before and after touching bacterial cultures.
> It is not necessary to wash your hands before you begin working with bacteria in the laboratory, as long as you wash them before you leave the lab when you are finished.
> It is ok to use personal pens and pencils in the laboratory.
> Always set test tubes or petri plate lids down on the lab bench when removed.
> Do not put hot loops into a culture-broth or agar.
> It is ok to pick up or handle a test tube by the cap.
> It is not necessary to wash your hands before you begin working with bacteria in the laboratory, as long as you wash them before you leave the lab when you are finished.
> It is ok to use personal pens and pencils in the laboratory.
> Always set test tubes or petri plate lids down on the lab bench when removed.
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Phosphorylating glucose during phase 1 of glycolysis:
A. releases phosphorylated glucose from cells. B. destabilizes the glucose molecule so that it can be broken down in stage 2. C. provides electrons to reduce NAD+ in stage 3. D. provides electrons to reduce FADH in stage 3. E. None of the answer options is correct.
A population with zero growth is indicated by
a. A. b. B. c. C. d. D. e. none of these
What technique would you use to detect a target sequence in an intact chromosome using a labeled molecular probe?
A) PCR B) in situ hybridization C) western blotting D) Sanger sequencing E) karyotyping
When a bacterium is introduced to a new environment that is an appropriate medium for that species to grow, fission allows a rapid expansion of the population (2-4-8-16-32-64... etc). But there is usually a slight lag before the bacteria actually begin building up such a logarithmic growth curve. What is the best explanation?
A. It takes time for sub-cellular units to evolve the ability to digest new media B. A bacterium is not actively producing all the enzymes it can code for, and it takes time to induce and amplify the production of the currently needed enzymes C. Binary fission becomes more and more efficient D. A new media dissolves away repressor proteins E. Structural genes act more slowly than metabolic genes