I need the correct answers for #5, #7, #8. One chegg tutor told me e,d,a and the

Question

I need the correct answers for #5, #7, #8. One chegg tutor told me e,d,a and the other told me d,b,a.

der the structure on the right and answer following questions: 5,) which of the following carbons marked with arrows ()'HzOH HO H ?? will get the D/l Mesignation? a) 1 b2 d)5 e) None of the above + carbons ?? ?? ?? 6.) Which of the following carbons marked with arrows which get the a/B designation? H OH ST a) 1 b)2 )5) d) 4 e) None of the above 7. This molecute contai ns a/anlinkage starting from left to righ. 4) (d) ? (191 e) None of these. ou H.?.?? 8/ In the above molecule, the folowing carbons can act as a reducing sugar OI b)2 e)3e The molecule on the right is made by ay hydraying fumarate cor bonuI corbon e) None of the above amctas a reaucing vaar redufing malate

Explanation / Answer

Answers

5) c) 4

Each Hexose gets a D/L designation on the 5th Carbon, hence the 2nd hexose of the disaccaride (sugar on the right) will get a D/L designation on Carbon numbered as 4.

7) D) Beta(1-1)

Alpa linkage is formed when the O of the glycosidic linkage is below the hexose ring, while Beta is when O is above the plane. Since this is below the plane it will be Beta. and by numbering each of the rings we'll get Beta (1-->1)

8) e) None of these

Non-reducing sugars do not have an OH group attached to the anomeric carbon so they cannot reduce other compounds. Both the anomeric carbons number 3 and 5 do not have a free OH group attached to it (involved in forming the linkage) none of the catrbons can act as reducing sugars.

*Please consider leaving a thumbs up if the answer helps you. It would really go a long way to support my work, thank you.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.