A hand sanitizer was advertised to be more effective at killing bacteria than any antibacterial soap. Students were split evenly into 4 groups to test this claim.
Groups 1-3 washed their hands using the assigned hand sanitizer or soap and
warm water for two minutes, and then dried their hands with a paper towel.
Group 4 rubbed their hands vigorously for 2 minutes in warm water, without any
soap or sanitizer, and then dried their hands with a paper towel. After washing,
each student's hands were swabbed and the swab was applied to a culture plate
and incubated. Finally, the bacterialſ cultures were counted. What group is the
control group?
Nour answer

Group 4

Explanation:

The control group in this case would be those students in group 4.

The control group during an experiment is a group that does not receive the treatment administered to other groups and as such used as a standard for measuring the effects of the treatment on other groups. Whatever differences that exist between the control group and the various treatment groups is attributed to be as a result of the treatment administered to the groups.

In this case, group 4 only used warm water for washing their hands instead of the hand sanitizer/soap used by the other groups. Whatever differences found out in the bacterial count in their respective culture swabs can be attributed to the effects of the hand sanitizer/soap.

i don't know what the picture looks like but i can take a guess and say maybe basidiomycetes?

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products