How can a yeast cell switch its mating type?
What will be an ideal response?
Ans: The mating type locus, MAT, has one of two forms, MATa or MAT?, that determines the mating type of the cell. This is the active cassette of the system. There are two silent cassettes in the system, HML? and HMRa. A switch of the mating type occurs when a silent cassette replaces an active cassette of the opposite type.
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Organisms such as Streptococcus pyogenes and Staphylococcus aureus that produce leukocidins are called ________ pathogens
A) pyogenic B) radical C) enterotoxigenic D) hemorrhagic
Bicarbonate forms when ________ splits
a. H2CO2 b. CO2 c. HCO3- d. H2O e. H2CO3
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A. aggregate B. double C. axillary D. simple E. multiple
________ matter (particularly humus) makes soil dark or black
Fill in the blank(s) with correct word