unit quiz 2

mesophilic

E colo is a normal inhabitant of the human gut where it thrives: for this reason is considered?

the first stage in converting the DNA sequence into a protein requires ribosomes bind to a gene and translate into protein

For a certain bacterium, it has been found that a region of the chromosome designated "X" comprises a specific sequence of DNA nucleotides; this sequence can be converted into protein when the cells are grown on sucrose. Which of the following statements among A-D is false regarding the information about this bacterium?

halophilic

bacteria capable of thriving in aquatic environments where the external osmolarity is very high would likely be considered?

which os the following is incorrectly matched?

codon table : represents dna nucleotides

oxygen

for many bacterial types, this component is an absolute requirement for growth, for others it may be toxic and still for others, some can live with or without it. this component is?

recombination

this process is generally important for DNA fragments entering a cell to become a permanent part of the bacterial genome

one of more of these enzymes would be in all the above. (facultative anaerobe, aerotolerant anaerobe, and obligate aerobe)

various concentrations of the following: superoxide dismutase, catalase, peroxidase or some combination of these enzymes, would not be found in?

in an HFR x F- mating, the F- cell is typically always converted to an F+ cell (false bc the F- stays the same)

what is false regarding an HFR strain?

a) an antimicrobial agent exhibiting bacteriostatic activity should always show a decrease in viable count c) implementing cold temp for food preservation has a bacteriocidal effect rather than a bacteriostatic effect

which of the following statement is false?

they are capable of using oxygen as part of their metabolism

which statement among is false regarding aerotolerant anaerobic bacteria?

the genome of a single stranded + rna virus can serve directly as an mRNA

which statement is true concerning RNA viruses?

carbon

you add 10 g/l of a nutrient to a growing culture of E. coli. after five hours, you observe that in response to the addition of the nutrient, the quantity of cell mass has doubled. the nutrient source of which element is the one you added that most likely yielded this effect?