ara+ and lac+ are genes required formetabolizing the sugars arabinose and lactose, respectively, andala+ and leu+ are genes required for synthesizingthe amino acids alanine and leucine. You are given the followingstrains:
Strain 1: leu- ala+ ara+lac+
Strain 2: leu+ ala- ara+lac-
Strain 3: leu+ ala+ ara+lac-
Strain 4: leu+ ala- ara-lac-
Which of these strains will grow on minimal media withglucose?
| A. | 2, 4 |
| B. | 2, 3, 4 |
| C. | 3 |
| D. | 1, 3 |
| E. | 1 |
ra+ and lac+ are genes required formetabolizing the sugars arabinose and lactose, respectively, andala+ and leu+ are genes required for synthesizingthe amino acids alanine and leucine. You are given the followingstrains:
Strain 1: leu- ala+ ara+lac+
Strain 2: leu+ ala- ara+lac-
Strain 3: leu+ ala+ ara+lac-
Strain 4: leu+ ala- ara-lac-
Which of these strains will grow on minimal media witharabinose?
| A. | 1 |
| B. | 2, 3, 4 |
| C. | 2, 4 |
| D. | 3 |
| E. | 1, 3 |
ara+ and lac+ are genes required formetabolizing the sugars arabinose and lactose, respectively, andala+ and leu+ are genes required for synthesizingthe amino acids alanine and leucine. You are given the followingstrains:
Strain 1: leu- ala+ ara+lac+
Strain 2: leu+ ala- ara+lac-
Strain 3: leu+ ala+ ara+lac-
Strain 4: leu+ ala- ara-lac-
Which of these strains will grow on minimal media withlactose + leucine?
| A. | 3 |
| B. | 1, 3 |
| C. | 1 |
| D. | 2, 3, 4 |
| E. | 2, 4 |
