MCB 301 Exam III Questions and Answers | 100% Pass
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Course
MCB 301
Institution
MCB 301
MCB 301 Exam III Questions and
Answers | 100% Pass
In the enrichment portion of the Experiment, how many nutrient agar plates will be
inoculated from your vegetation sample? - Answer️️ -Incorrect 5
Incorrect 3
Incorrect 4
Correct: 2
In the isolation portion of the Experiment, wet mounts ...
Suring sporulation, the membrane of the mother cell grows around the membrane of the
daughter cell. As a result, the daughter cell is engulfed inside the mother cell and is
surrounded by two membranes : the inner foreshore membrane, which arises from it's
own cytoplasmic membrane, and the outer foreshore membrane which arises from the
inside-out cytoplasmic membrane of the mother cell
In the sporeformer post-enrichment exercise, PYE medium was supplemented with
glucose. How many milliliters (mL) of a 25% glucose stock solution must be added to 20
mL of PYE medium to make 0.4% glucose? (2 pts) - Answer✔️✔️-0.32 ml (2 pts)
Note: (25%)(x mL) = (0.4%)(20 mL) = 0.32 mL
C1V1=C2V2, (25% glu) X = (0.4% final glu) (20 mL PYE), X = 0.32 mL
Why are cysteine residues important in the spore coat protein? (2 pts) - Answer✔️✔️-
Cysteine residues contain sulfhydryl groups so two residues can covalently link to each
other by forming a disulfide bond. This allows the coat proteins to interact more strongly
with one another to strengthen the spore coat. Also, intramolecular disulfide bonds
might form to strengthen the individual coat protein. (2 its)
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