Question 6: The following biochemical pathway represents the pathway for the syn

Question

Question 6:
The following biochemical pathway represents the pathway for the synthesis of black pigment in the scales of dragons. The colourless chemical precursor is converted to a black pigment in a series of steps catalysed by four different enzymes which are encoded by genes A-D.


a) What is the expected scale colour in dragons with mutations in the following genes:
Mutant Defective Genes in Mutant Feather Colour
1 gene B
2 gene D
3 gene C
4 gene A
5 gene B and gene C

b) Scientists have been able to recreate this biochemical pathway in a test tube using purified enzymes. If the 4 enzymes are added to the colourless chemical precursor, black pigment is produced in a test tube. Predict the colour that is produced in the test tube if the following enzymes and intermediates are mixed together in a test tube:
Test tube Enzymes Intermediate Colour
1 enzyme 2 yellow pigment
2 enzyme 1 yellow pigment
3 enzyme 3 yellow pigment
4 enzymes 1, 2, and 3 yellow pigment
5 enzymes 2, 3, and 4 Green pigment
6 enzyme 2 Green pigment
7 enzymes 1, 2, and 3 Blue pigment
8 enzyme 4 Blue pigment

Explanation / Answer

The expected scale colour in dragons with mutations in the following genes:
Mutant Defective Genes in Mutant Feather Colour
ANSWER:- 5 ) gene B and gene C

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

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