Question

30. Which of the choices below is the enantiomer of D-glucose? сно сно нон HO-EH сно на-он D-glucose Іно-Ен н -он но-Ен EH,OH сно но н-он но -н нон Сн,он но-Ен на-он но -н но-Ен н -он нон CHO но -н н-он но-Ен нон снен CHOH Сн,он 3. Which of the following structures is an a-anomer? Сн,он —о, он o ноноон нонс осн он — о оно сн, он он онон он он он он тон КСн,он y CH, OH 04 Онон D 32. The ring form with the ring structure shown at le below is called a and the ring form with the ring structure to the right below is called a нонс о. Сн,онд сн,ОН Хя о СН2ОН о ОН A) pyranose; pyranose B) pyranose; furanose C) furanose; furanose D) furanose; pyranose E) The choices given do not apply to ring forms of sugars. 33. Which of the following glycosidic linkages does the sugar shown below contain? Сн,он Сн,он о он COH ОН. ОН А) B-(2—4) В) а-(1—4) C) B-(1—4) D) a-(2—4) E) al— 34 Which of the following molecules is NOT a polysaccharide? amylose B) amylopectin C) cellulose D) glyceraldehyde hich of the following is the storage form of glucose in animals? glycogen B) amylose C) amylopectin D) cellulose

Answer 1

30) Answer is C). Because it is non-superimposable mirror image of D-glucose.

31) Answer is B). Because OH group at carbon-1 is lower side.

32) Answer is D). Because five membered ring is furanose and six membered ring is pyranose.

33) Answer is B). Because glycosidic bond lie downward hence, it is alpha and carbon bonded are C-1 of one sugar and C-4 of another sugar.