Sulfa drugs like bactrim, given for bacterial infections, inhibit bacteria by blocking folic acid synthesis. the precursor molecule of folic acid is para-amino benzoic acid (paba). interestingly, paba has a structure very similar to a sulfa drug. if a sulfa drug is present, the bacterial enzyme will bind the sulfa drug because of structural similarity. this is an example of:

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?

How many types of rock can form from the rock cycle

What material did the moon come from?