Microbiology Answers

Q.18 A cold storage plant is used for storing 50 tonnes of apples in perforated plastic crates. During the
storage, apples are cooled down from 28°C to storage temperature of 2°C. (Specific heat of the
apple = 0.874 kCal kg-1
°C-1
). If the required cooling is attained in 16 hours, the refrigeration plant
capacity (in Tons) is
(A) 19 (B) 24 (C) 29 (D) 32
Q.19 An actively growing culture of Acetobacter aceti is added to the vigorously aerated fermented fruit
juice medium containing 10 g l
-1
ethanol to produce vinegar. After some time, the ethanol
concentration in the medium is 0.8 g l
-1
and acetic acid produced is 8.4 g l
-1
.

What is the conversion
efficiency of the process with respect to theoretical yield?
(A) 30 (B) 50 (C) 70 (D) 90

Using light microscopy you examine the soil samples and the goo from the degraded polyurethane. Will this approach allow you to observe all microorganisms present in the sample ? why or why not ? What are the limitations of this approach?

tell me calculation of Colony forming unit for product. i prepared serial dilution 10 ml sample in 90ml i.e1:10 ratio, transfer 1ml into 9ml saline i.e 1:100, i got 4 colony in 1:10, 2 colony in 1:100 dilution

why an organism fail to grow?

If the hyphae are spread out, the fungus _____.

what does it mean when a microbiologist says that the Fecal levels observed in patients dosed with 250 mg were at least 1000 fold higher than the MIC90?

1. the semisynthetic methicillin has the advantage of ?
2. today antiserum is used for ?

In the latest stage of a HIV infection a patient is diagnosed with AIDS. An ELISA test shows the
presence of antibodies against the human immunodeficiency virus (HIV) in the patient’s serum.
Why does a patient have an immune deficiency if he or she is making antibodies? Can you please explain this phenomenon to me, I would like to get a clear understanding of this.

Do Elisa, Flow Cytometry and PCR separate molecules by size?