Teicoplanin is an antibiotic which 'caps' the building blocks used in the construction of the bacterial cell wall such that they cannot be linked up. the cell wall is a barrier surrounding the bacterial cell membrane and the building blocks are anchored to the outside of this cell membrane prior to their incorporation into the cell wall. teicoplanin contains a very long alkyl substituent which plays no role in the capping mechanism. however, if this substituent is absent, activity drops. what role do you think this alkyl substituent might serve?

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.