Four different uracil auxotrophs of Neurospora are tested for growth on uracil and uracil precursors. The data are shown in the table below. A plus sign (+) means growth. Mutant 1 is defective for which enzymatic step? Compound A B C D Uracil Mutant 1 - + - - + Mutant 2 - + - + + Mutant 3 + + - + + Mutant 4 - - - - +

Four different uracil auxotrophs of Neurospora are tested for growth on uracil and uracil precursors. The data are shown in the table below. A plus sign (+) means growth. Mutant 1 is defective for which enzymatic step? Compound A B C D Uracil Mutant 1 - + - - + Mutant 2 - + - + + Mutant 3 + + - + + Mutant 4 - - - - +

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter15: From Dna To Protein

Section15.1: The Connection Between Dna, Rna, And Protein

Problem 1SB

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Four different uracil auxotrophs of Neurospora are tested for growth on uracil and uracil precursors. The data are shown in the table below. A plus sign (+) means growth. Mutant 1 is defective for which enzymatic step?

	Compound
	A	B	C	D	Uracil
Mutant 1	-	+	-	-	+
Mutant 2	-	+	-	+	+
Mutant 3	+	+	-	+	+
Mutant 4	-	-	-	-	+

		D to A
		A to D
		D to B
		C to A
		A to C

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