#Question id: 15818
#Unit 8. Inheritance Biology
You and your lab partner have isolated 20 new mutant yeast strains that are defective in synthesis of threonine, an amino acid. These Thr- mutants do not grow on minimal medium, but they do grow on minimal medium supplemented with threonine. Ten of your Thr- mutants (numbered 1 through 10) were isolated in a strain of mating type a (MAT a). The other 10 Thrmutants (numbered 11 through 20) were isolated in a strain of mating type α (MAT α). You and your lab partner cross each of the MAT a strains to each of the MAT α strains, and you include crosses to the appropriate wild-type strains. Your experimental observations are shown in the table below, where (-) indicates diploids that did not grow on minimal medium and (+) indicates diploids that did grow on minimal medium.
What is the maximum number of genes that these 20 mutants could represent?
#Question id: 20293
#Unit 7. System Physiology – Animal
#Question id: 11435
#Unit 1. Molecules and their Interaction Relevant to Biology
Given the pka values of different acidic sites in cysteine the principle ionic form in which it exists at pH 7
#Question id: 10847
#Unit 10. Ecological Principles
In the stomachs of ruminants, such as cows, certain microbes digest cellulose, a material the cow cannot digest itself. This interaction between cows and microbes represents an example of
#Question id: 19037
#Unit 13. Methods in Biology