###pharmacognosy Titorilal 1.pdf

Phytochemistry-1

Delta University

Tutorial 1, Carbohydrates

Faculty of Pharmacy

For Thirs Level Students 1 March, 2019 Time : 20 min

Pharmacognosy Department 1

Tutorial 1, Carbohydrates For the drawn compound questions 1-5: 1. Classify this compound according to No. of carbon, 2. This sugar is D/ or L 3. What is the name (type) of this formula 4. Draw the Haworth projection formula for the 2 anomers

5. Draw the 3-epimer of this structure 6. (+) indicates ----7.

Is this ( α or  ) D glucose

8. The change in the specific optical rotation until reaching a constant value is known as …………. …….phenomenon

9. A sugar that not obey the hydrate role, but considered as carbohydrates, is …….

Page 1 of 3

10. What are the Function of Carbohydrates in Cells :    

………………………………… ………………………………… ………………………………… …………………………………

11. Stachyose is a type of ………..…, which upon hydrolysis gives …… ………….

12. Give short notes on Biosynthesis of Carbohydrate?

13-16. 13. All CHO are synthesized in plants in a process called ……………………. 14. This process is divided into 2 main reactions: a. the first reaction is named ………… ……………….. that responsible for ……… ……… … ……… ………….. b. The second reaction is named ….. ……..…….. that responsible for …… …… …… …………………………………………….

15. Draw the equation for this reaction:

16. Plant cell utilizes …………either as energy or as a building units to give ………

Page 2 of 3

17. Glucans are classified as …………., which upon hydrolysis gives ……….. and could be exemplified by …… 18. Xylans: are classified as ….. ……….., which upon hydrolysis gives … ….. 198. Polyuronides are classified as ……….... and exemplified by ……. 20. Heating a sugar solution with conc HCl , and exposing the fumes to an aniline acetate paper produced a red stains indicating a presence of ……… ….., due to liberation of ……… …. 21. Heating methylpentoses with conc HCl produces ………….. , which is (volatile or non volatile, choose), that produces with aniline acetate paper a ….. ….stain 22. Keeping glucose solution in akali results in its conversion to .......mannose and fructosein....in a process termed ....... ……

Page 3 of 3