Question

In an a helix, the R groups on the amino acid residues: Question 1 Not yet answered Points out of 5.00 P Flag question Select one: A. generate the hydrogen bonds that form the helix B. cause only right-handed helices to form. C. alternate between the outside and the inside of the helix D. are found on the outside of the helix spiral. Estack within the interior of the helix. Next page

Answer 1

Answer. & The a-helix is a common secondary structure of natural proteins. It is a night - handen ens. It is a night - handed helical conformation where the backbone N-t group participates in hedercogen bonding with backbone c=0 gecoup of the amino acid. To facilitate this H- bonding the R- n - groups on the amino acid groups on ore focand outside the helical spinal. so, the correct option es 1 are found on the our side of the helical spiral. residue are found outs!

2. Tandem Mass spectroscopy is used to édentify the protein sequencing. After the peptides are entroduced cofth the spectrometer, the pecoteins are becoken into smaller peptides and then inserted in the mass spectrometry. There; the peptides are separated by mass-to-charge ratio; as in the mass spectrometer ions are generated. If the mass - co-c'harge ratio is similar cie. the difference between two peptide units es very small, they appear to be similar. This would be the case only if difference between the two peptides lie in the middle of the series. Now, let us look at the given options: TSPLYANEGK and VTCPLYANEGK. VTSPLY ANEGK and VTSPLYADEGK. VTSPLYANEGK and VTSPIYANEGK.. VTSPLY. ANE GK and VST PLYANEGK .. only in case of @ the difference lies in the middle of the series. So, it is the couvrect option

3. To answer this question, let us gaina bereif idea about the offered choices... A sétes: These are regions in a protein that bends. to another molecule with specificity. domains. These are parts of a given protein sequence that can evolve, function and exist independently of the rest of the perotein chain. ② pepeides : These are short chain of amino acids oligomers. These are some macromolecular complexes freemed by non- covalent bonding of few proteins are nucleic acids: & subunits : These are single protein molecule that assembles with other molecules of protein to form a pecotein complex. Thus, it is evedene that the correct option is ② domains: