Question

question 3

structure of the pentapeptide? dent of the pentapeptide with chymotrypsin gave the following Choose one answer. A. phe-phe-gly-val-eu B. gly-val-phe-leu-phe C. leu-gly-val-pho-phe D. phe-lou-gly-val-phe Incorrect Marks for this submission: 0/1 3 Marks: 1 Karl Nessler received the patent for the so-called "hot procedure for a permanent (hair) in 1906. The hair was treated with a basic solution (NaOH in waterph approx. 10) and then heated for several hours on the curler. The result was often extremely curly hair. What kind of bonds was were actualy (partialy) broken and reformed? a. hydrogen bonds b.ionic bonds c. disulfide-bridges d. dipolar bonds Choose one answer A. a and bare correct B. a, b and care correct C. a, b, and d are correct D. all of the above are correct Incorrect Marks for this submission: 0/1 4 The first known procedures to bend straight hair into our dates from 3000 B.C: Hot Curlers made from clay were used. The hair was apparently dry What kind of bonds was/were actually broken and reformed? Marks: 1 Choose one answer A. hydrogen bonds Blonic bonds C. disutide-bridges 09 ww 30

Answer 1

In hair, there are three types of bonds: H-bonds, ionic bonds and sulfide bridges. Hence option B is correct.