The answer is A The amino acid inactivates the repressor
1 air
2 water
3 food
4 temperature
5 sunlight
6 shelter
The best way may be is going over the notes on the chapter you were doing. Or going over the chapter once or twice.
Semi permeable means that some things can go in and out of the cell, but some cannot. Permeable means it allows things to pass through it, so semi permeable means only some things pass through.
There are 4 outer atoms and lone pairs that are present in a molecule with a see-saw shape. It was called "seesaw" comes from the observation that it looks like a playground seesaw. It is very common that four bonds to a central atom result in tetrahedral or, less commonly, square planar geometry.
