Why do the polypeptides made in prokaryotes always contain formyl methionine as the first amino acid? a. The terminator tRNA adds formyl methionine first.
b. The initiator tRNA adds formyl methionine first.
c. The terminator tRNA adds methionine amino acid first.
d. The initiator tRNA adds methionine amino acid first.

Why do you think the puppy litter was all dark-haired?

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?

What is the role of the phospholipid belayer in cellular transport in living cells