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Discovery of Auxin

A mutant stra...

Question

A mutant strain of Neuraspora which fails to grow on a minimal medium unless supplemented with a nutrient is called

A

Auxotroph

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B

Autotroph

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C

Heterotroph

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D

Prototroph

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Solution

The correct option is A Auxotroph
A mutant strain of Neurospora is Auxotroph.

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Q. A mutant strain of Neurospora which fails to grow on a minimal medium unless supplemented with a nutrient is called

Q. The strain of Neurospora which grows on minimal medium is called

Q. A mutant organism that will not grow on a minimal medium but does so on addition of some growth factors is known as

Q. An organism is able to live on a culture medium containing nutrient A, by the enzyme catalysed reaction :

A X - \to B Y \to C

A mutant failed to survive in this medium but grew when nutrient B was added to it. Which gene of this mutant was defective?

Q. In order to study the lysine biosynthetic pathway in yeast, lysine auxotrophs(mutants that are unable to grow without lysine supplementation to the minimal growth medium) were screened. Four mutants(m

1

4

) were isolated, which were all recessive compared to the wild-type(WT). To find out the number of genes affected by these mutations, haploid mutants were mated and the ability of the resultant diploid progeny to grow on medium lacking lysine was tested. The results are shown in the table.
(

^{'} +^{'}

indicates growth and

^{'} -^{'}

indicates no growth) Based on these results, which of the following statement(s) is/are correct?

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Discovery of Auxin

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