QUESTION 2 You are given four samples and told they are lysine (an amino acid),L

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QUESTION 2
You are given four samples and told they are lysine (an amino acid),Lactose (a disaccharide), insulin (a protein), and RNA. The samples are in test tubes but the tubes are only labeled 1-4. You are instructed to determine the contents of each tube.
In your first test, you try to hydrolyze a portion of the contents of each tube. Hydrolysis occurs in all tubes except tube 3.Next, you find that tubes 1, 2, and 3 are positive for nitrogen and tube 2 is also positive for sulphur.The last test shows that tube 1 contains a high percentage of phosphate.

___Tube 1
___Tube 2
____Tube 3
____Tube 4
A.RNA
B.Lactose
C.Insulin
D. lysine

QUESTION 1 What type of molecule is shown below? OH A RNA nucleotide B. unsaturated fatty acid C C.monosaccharide D saturated fatty acid E steroid F. phospholipid G dipeptide H. disaccharide I amino acid J. DNA nucleotide search

Explanation / Answer

Question 1: The answer is B. Unsaturated fatty acid.

Due to the presence of double bond it is an example for unsaturated fatty acid.

QUESTION 2: The answer is

___Tube 1 : A.RNA - Due to Phosphate Nitrogen backbone, it is positve for phophate, Nitrogen

___Tube 2 : C.Insulin - Due to Amino acid cysteine and methionine, it is positive for sulphur

___Tube 3 : D. lysine
As it is a moner, hydrolysis is not possible.

___Tube 4 : B.Lactose
As it is a disaccharide , it given positive for hydrolysis.

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