Dsadafaa

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Dsadafaa

By | July 2013
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FHSB 1214
BIOLOGY 1
FOUNDATION IN SCIENCE

Name| LEE KEH JIE (1302255)|
Partner’s Name| SHERMAN TAN WEI MING (1302523) CHONG DICK BAN (1302376)| Practical Group| Stream P- Group 3|
Date of lab class| 17/06/2013|
Program| Foundation in Science|
Unit code| FHSB1214|
Unit description| Biology I|
Year and trimester of study| 2013, Trimester 1|
Title of lab report|  Practical 3: Identification of Action of Saliva and 3M Hydrochloric Acid in Two Carbohydrates Solution| Lecturer’s name| MS. BONG SM|

Title of lab report:
Practical 3: Identification of Action of Saliva and 3M Hydrochloric Acid in Two Carbohydrates Solution. Objective:
To determine the type of carbohydrates.
Results:
Table 1:
| Observations| Conclusions|
Solution A| Benedict’s test: (Positive results), Pale blue colour solution changes to orange colour solution.Iodine test: (Negative results), Orange colour solution remains the same. | -Solution A is a reducing sugar. --Starch is absent in solution A.| Solution B| Benedict’s test: (Negative results), Blue colour solution remains the same.Iodine test: (Positive results), Orange colour solution changes to dark purple colour solution.| -Solution B is a non-reducing sugar. -Starch is present in solution B.|

Table 2:
Tube| Contents| Temp(°C)| Benedict’s Test—Colour Observation| | | | After 5th min (from tubes 1 – 4 into 1’ – 4’)| After 35th min (from tubes 1 – 4 into 1’ – 4’)| 1| 10 ml solution B 1 ml saliva| 37| (Positive results, less precipitate than 35th min), Colourless solution changes to dark green colour solution.| (Positive results), Dark green colour solution changes to blue colour solution.| 2| 10 ml solution B 1 ml 3 M HCl| 37| (Negative results), Colourless solution changes to blue colour solution.| (Negative results), Blue colour solution remains the same. | 3| 10 ml solution B 1 ml 3 M HCl| 95| (Positive results, less...