Microbiology Answers

Find odd one out about water and food born diseases : -
(1) Typhoid
(2) Ascariasis
(3) Hepatitis-B
(4) None of these

Read the following statements (A to D).
A. White rust fungus can also live parasitically on mustard leaf.
B. Entamoeba move and capture their prey by putting out cilia
C. Members of kingdom fungi show a great diversity in morphology and habitat.
D. Protozoans are unicellular, and mostly heterotrophs.
How many of the above statements are correct?
(1) Three
(2) One
(3) Four
(4) Two

BACTERIA LACKING FLAGELLA AND MOVING BY GLIDING ARE -

1. RICKETTSIA

2.EUBACTERIA

3. SPIROCHAETE

4. MYXOBACTERIA

y help would be great this lab is due tomorrow and I'm not sure of the answers. For a lab I looked at the following organisms under a microscope: e. coli, daphnia, paramecium, amoeba, volvox, hydra, planaria and euglena. The questions that went along with it are these two. 1.a) How would you rank the organisms you have examined from least to most complex? Explain why. b) Which specimen might represent an evolutionary link between unicellular and multicellular organisms? Explain why. 2. One of these organisms that you have viewed presented a real problem to early biologists as to how to classify it. Identify the one you would choose and explain why.

what will happen to a double helix process created by a cheek cell dna extraxtion without adding dna polymerase

Why does penicilin cause so few side effects while amphotericin B causes so many? Consider the structure of prokaryotic and eukaryotic cells when giving your answer?

what is the difference between yeast and filamentous fungi based on reproduction?

A particular poison works by interfering with the enzyme required to synthesize tRNA. At which step in protein synthesis will the process be stopped?

Initiation

Elongation

Termination

Replication

Q.15 Thermal death of viable spores of Bacillus subtilis in a food sample follows a first order kinetics
with a specific death rate constant of 0.23 min-1
at 100°C. The time (in minutes) required to kill
99% of spores in the food sample at 100°C will be
(A) 10 (B) 20 (C) 23 (D) 60
Q.16 How much skim milk (in kg) containing 0.1% fat should be added to 500 kg of cream containing
50% fat to produce standardized cream containing 36% fat?
(A) 140 (B) 165 (C) 195 (D) 210

Q.20 An enzyme catalyzed reaction (following Michaelis-Menten kinetics) exhibits maximum reaction
velocity (Vm) of 75 nmol l
-1
min-1
.

The enzyme at a substrate concentration of 1.0x10-4
M shows the
initial reaction velocity of 60 nmol l
-1
min-1
. The Km value of the enzyme in molar concentration
(M) is
(A) 2.5 x 10-5
(B) 5.0 x 10-5

(C) 2.5 x 10-4
(D) 5.0 x 10-4