13. What featured does a Ramachandran plot display? The hydropathy of amino acid
ID: 1071392 • Letter: 1
Question
13. What featured does a Ramachandran plot display? The hydropathy of amino acids preferred amino acids In an alpha-helix allowed angles of phi and psi for a polypeptide backbone variation of pH versus volume of base added during titration to determine the pKa. How many monomers are there in the oligomeric protein designated of alpha beta_2 gamma_2? 3 4 2 5 not given Which statement is not true about an alpha-helix? it is stabilized by hydrogen bonding It is usually right handed It is a type of secondary structure It is more extended compared to a beta-strand. Nucleotides contain phosphate groups bonded to the: C3' or CS' atoms C3 or C3' atoms CS or N9 atoms C3 or N9 atoms none of the above Free nucleotides are almost always associated with In cells. proteins cholesterol Cl^-counterions fatty acids Mg^2+ counterions Chargraffs rules for DNA state that: G+C = 39-46% in mammals A = U and G = C the minor groove is shallower than the major groove AExplanation / Answer
13. The answer is C
A Ramachandran plot (also known as a Ramachandrandiagram or a [,] plot is a way to visualize energetically allowed regions for backbone dihedral angles against of amino acid residues in protein structure.
14. The answer is D- 5
1-alpha, 2-beta and 2 gamma
15. The answer is D
The distance between amino acids in a beta strand is 3.5A which is longer in comparison to the 1.5A distance in alpha strands. Because of this, beta sheets are more flexible than alpha helices and can be flat and somewhat twisted.
16. The answer is A
Nucleotides join together through phosphodiester linkages between the 5' and 3' carbon atoms to form nucleic acids. The 3' -OH of the sugar group forms a bond with one of the negatively charged oxygens of the phosphate group attached to the 5' carbon of another sugar. When many of these nucleotide subunits combine, the result is the large single-stranded polynucleotide or nucleic acid, DNA
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