50 Exercise 5 Biologically Important Molecules salad oil milk, yogurt, tofu, 3 o

Question

50 Exercise 5 Biologically Important Molecules salad oil milk, yogurt, tofu, 3 or 4 "unknowns" plain coconut-pineapple drink by Hansen Each Lab Desk Should Also Have Available hot plate test tube racks test tube brushes glassware cleaner distilled water dishwashing facilities PRACTICE QUIZ-BIOLOGICALLY IMPORTANT MOLECULES Write the biologically important molecule that the sub- stance contains. Carbohydrate Protein, Lipid 1. Salad oil 2. Sugar 3. Starch 4. Egg albumin 5. Which of the biologically important molecules contain the element nitrogen? 6. Which have as their basic building units, amino acids? 7. Which break down into units called glucose? 8. Which reagent is used to test for glucose? 9. How do you test for fats and lipids? 10. Which reagent is used to test for starch? 11. Describe the results of a positive test for protein using Biuret's reagent. 12. What color would develop in a strongly positive test for glucose using Benedict's reagent? 13. What biologically important molecules were in the following substances milk unknown sample A unknown sample B

Explanation / Answer

Answers: -

1.lipid.

2.carbohydrate.

3.carbohydrate.

4.protein.

5.protein.

6.protein.

7.carbohydrate.

8.Benedict's reagent.

9.Emulsion test.

10.iodine.

11.The biuret test (Piotrowski's test) is a chemical test used for detecting the presence of peptide bonds. In the presence of peptides, a copper(II) ion forms violet-colored coordination complexes in an alkaline solution. ... In a secondary reaction, the copper(II) is reduced to copper(I)

12.blue to Orange colour.

13.milk contain sugar-lactose, protein- casein and lipids also.

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

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