Aromatic carbon compounds such as benzene are planar and ver

Aromatic carbon compounds such as benzene are planar and very stable around the entire ring, which is why it is often drawn as a hexagon with cinde T characteristic is caused by electron b) pairing (a) resonance (c) partial charge (d) stacking 2-6 The amino acid histidine is often found in enzymes Depending on the pHofits environmem sometime histidine is neutral and at other times it acquires a proton and becomes positively charged Consider enzyme with a histidine side chain that is known to have an important role in the function ofthe mayme It is not clear whether this histidine is required in its protonated or its unprotonaned stane To answer this question you measure enzyme activity over a range of pH, with the results showm in Figure Q Which form of histidine is necessary for the active enzyme Figure Q2-26 Molecules in Cells 2-28 The variety and arrangement of chemical groups on monomer suburitsoontribute to the earliamaian. reactivity, and surface of the macromolecule into which they become incorporated what type of chemical group is circled on the nucleotide shown in Figare Q2-2s? Figure Q2-28 (a) pyrophosphate b) phosphoryl

Solution

2-28. (a)pyrophosphate

2-29. (a) ionic bonds

2-30. (a) Serine

2-31.(a) glucose and galactose

2-32. (A) It has 20 Carbons (B) 31 Hydrogens,(C) it is a fatty acid