Biology, 29.07.2019 01:30 Jvnvthvn

How could the procedures used in this experiment be altered to measure bacteriostatic effects?

Answers: 1

Show answers

Answers

A bacteriostatic chemical agent means that the chemical blocks the growth of the bacteria. A bactericidal chemical means that the chemical agent kills the bacteria.
To test whether a chemical agent is bacteriostatic, the researcher should, first of all, make a culture with the bacteria of the experiment. Then, the diluted chemical tested for its bacteriostatic effect should be added to the bacterial culture and this mixture should be left to incubate overnight. The next day, the researcher should see if there is any growth of bacteria. If no bacterial growth is observed, then the next step should be a subculture. Meaning that the bacteria should be cultured again to a sterile medium that does not have the chemical agent tested. After incubating this subculture again, the researcher should see whether there is any bacterial growth. If there are no bacteria in this subculture, then the chemical killed all the bacteria and this means that it was bactericidal. If the incubation of the subculture has bacteria, then the chemical did not kill the bacteria in the first place (it only stopped their growth) and it means that it was bacteriostatic.

Answer from: Quest

slitherio is the original. its the best friend of all middle schoolers. the man you can count any time you have some free time. slitherio is the guy you hang with while you're in the computer lab suppose to be doing "research or whatever". slitherio isn't just a game but a friend.

wormaxio is just a fake trying to squeeze its way into the friend group. trying to pretend its cool and your best pal but how long has it really been there for you, really. it only wants you as friend to boost its social status. wormaxio is just annoying fake pleb. no offense

you and have a wonderful day

Answer from: Quest

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.

Another question on Biology

Biology, 22.06.2019 01:50

Which statement best describes lactic acid fermentation? a. lactic acid fermentation is the first step of cellular respiration. o b. lactic acid fermentation is the final step of cellular respiration. re to berate c. in the absence of oxygen, cells release atp by breaking down lactose into glucose. e der lade res o d. in the absence of oxygen, cells release atp by breaking down glucose into lactate. ar

Answers: 1

Answer

Biology, 22.06.2019 05:00

According to this food web which of the following would be considered primary consumers

Answers: 1

Answer

Biology, 22.06.2019 06:50

Which organelle breaks down sugar molecules that supply energy to the cell ?

Answers: 2

Answer

Biology, 22.06.2019 10:20

The function of the excretory system is to control homeostasis and