Which of the following statements is false for the
catalyticmechanism in serine proteases like chymotrypsin?
1. theinitial proton transfer makes an 'incipient' alkoxide ion,
which isa better nucleophile than an alcohol.
2. the initialbond formation in the covalent intermediate is
between the serine oand carbonyl c in the peptide backbone.
3. his actsinitially as a general acid catalyst, providing a proton
to thecarbonyl oxygen of the substrate.
4. prior tobinding the peptide substrate, the active site of the
restingenzyme contains a serine residue, a deprotonated histidine
and adeprotonated aspartic acid residue.
5. the oxyanionhole stabilizes the anionic tetrahedral intermediate
by having twoh-bond donors at the right location, poised to
interact with thenegative charge.

Me brainliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula.5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects.8. describe the planets’ orbits around the sun.9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets.13. what causes the seasons?