Microbiology Answers

Can a bacteriophage have only one out of the two possible life cycles ( lytic cycle and lysogenic cycle), or it can shift from one cycle to another? For example we take T2 phage, it was lytic cycle , can it also have lysogenic cycle, can it shift through cycles?

True or False
1. Gelatin is used at as concentration of 20-25%
2. A culture medium simply supplies nutrients and conditions essential for growth of a culture.
3. Since Agar is a carbohydrate, it supplies energy for the bacterial culture.
4. Most cocci have no motility.
5. Protozoa lack a cell membrane.
6. A hanging-drop preparation is used to observe Brownian motion.
7. Bacilli are the most common form of bacteria.
8. Aseptic technique will sterilize the culture medium so it can be inoculated.

Match Column B to Column A. A choice may be used more than once or not at all.
Column A:
1. Anaebaena
2. Mass of surface floating cells
3. Vibrio
4. Paramecium
5. Plasmodium
6. Motile bacteria
7. Spirogyra
8. Rhizopus

Column B:
A. Mastigophora
B. Autotrophic Eucaryote
C. Cocci
D. Autotrophic Procaryote
E. Pellicle
F. Sarcodina
G. Turbidity
H. Slime
I. None of these
J. Sprilla
K. Immotile Protozoan

Fill in the blank
1. In enzyme structure, the active site fits the_____.
2. The ETS utilizes____phosphorylation for the production of ATP.
3. Conversion of glucose to pyruvic acid would be called____.
4. The structures which carry electrons in the ETS are known as____.

Fill in the blank.
1. ___ are a group of Procaryotes (bacteria) that move by the contraction of Axial Filaments.
2. A weakened form of an organism is said to be____.
3. Gentle heating to destroy microorganism is called____.
4. ___did the most to prove the Germ Theory of Disease.
5. The procaryotic cell wall is made up of___(specific type)
6. The Gram Negative cell with its cell wall removed is a(n)___.
7. A bacterium which has a flagellum at each pole of the crll is called____.

True or False?
1. High entropy is a characteristic of all living things.
2. Penicillin is a protein synthesis inhibitor.
3. The Procarytoic cell wall us known as the cell coat.
4. The Gran negative cell, the mitochondria produce energy.
5. The NAG units are crosslinked by pentaglycine bridges in the PG.
6. Mycoplasma are Procaryotes (bacteria) which do not produce a cell membrane.
7. Abiogenesis is the same as spontaneous generation.
8. Generally, eucaryotes do not have cell wall.
9. The mesosome is part of the cell wall.
10. The nucleoid is the site for the procaryotic genome.

How could
you determine whether the microbes present in the soil or goo samples are phylogenetically similar or distant from known microorganisms on Earth?

Explain why penicillin would not be useful in the treatment of Thrush.

List 5 major classes of antimicrobials and 2 brand name examples of each class.