Which mutant colony/colonies is/are unable to synthesize arginine? Select all th

Question

Which mutant colony/colonies is/are unable to synthesize arginine?

Select all that apply.

1) 1

2) 2

3) 3

4) 4

5) 5

6) none

Which mutant colony/colonies is/are unable to synthesize methionine?

1) 1

2) 2

3) 3

4) 4

5) 5

6) none

Which mutant colony/colonies is/are unable to synthesize leucine?

1) 1

2) 2

3) 3

4) 4

5) 5

6) none

Which mutant colony/colonies is/are unable to synthesize lysine?

Select all that apply.

1) 1

2) 2

3) 3

4) 4

5) 5

6) none

Which mutant colony/colonies is/are unable to synthesize histidine?

Select all that apply.

Which mutant colony/colonies is/are unable to synthesize more than one of the tested amino acids?

Select all that apply.

Explanation / Answer

Please find the answers below:

Answer 1: Colony 5 (unable to grow on arginine lacking medium)

Answer 2: Colony 4 (grows only on arginine supplemented plates)

Answer 3: Colonies 2 and 5 (cannot synthesize leucine and hence require supplementation for growth)

Answer 4: Colony 3 (absolutely requires lysine for its growth)

Answer 5: Colonies 1, 5, 4 (require supplemented basal medium for growth)

Answer 6: Colonies 1, 2, 4 and 5 require more than one amino acids for their growth

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