1. The organism which use organic compounds as principle carbon source is called
a) Autotroph
b) Heterotroph
c) phototroph
d) Chemotroph
Answer : b
2. 70S Ribosomes are composed of ______
a) protein & RNA
b) protein & DNA
c) Protein & Nucleic acid
d) Peptide & DNA
Answer : a
3. Teichoic acid is unique to walls of ______ bacteria .
a) Gram positive
b) Gram negative
c) Gram variable
d) None of these
Answer : b
4. The cocci divide in _____ plane
a) one
b) two
c) three
d) all are correct
Answer : d
5. The rod shaped bacteria divide in _____ plane .
a) one
b) two
c) three
d) four
Answer : a
6. The science that deals with the origin, structure & function of cells is referred as _____
a) Cytology
b) Morphology
c) biology
d) Psychology
Answer : a
7. Which among the following structure of bacteria lie external to the cell wall of bacteria?
a) Glycocalyx
b) Flagella
c) Pili
d) All of these
Answer : d
8. Heteropolysaccharide capsules contains _____ types of sugar units.
a) One
b) More than one
c) Fifty
d) Twenty
Answer : b
9. When glycocalyx layer is unorganized loosely attached to the cell wall it is called as _____.
a) Capsule
b) Slime layer
c) Capsule and slime layer
d) All of these
Answer : b
10. The unit of measurement used in bacteriology is ______.
a) Micron
b) Millimeter
c) Centimeter
d) Kilometer
Answer : b
11. The cocci dividing in one plane & remain attached in pair is called ____ .
a) Streptococci
b) Diplococci
c) Tetrad
d) Staphylococci
Answer : b
12. Morphology of E.coil is _____ .
a) Cocci
b) Sperical
c) Spiral
d) Rods
Answer : d
13. The diameter of flagella can be increased by coating it with ______ .
a) Stain
b) Mordant
c) Dye
d) Protein
Answer : b
14. The flagellar arrangement having several flagella all over the surface of bacteria is referred as _____ pattern.
a) Monotrichous
b) Lophotrichous
c) Amphitrichous
d) Peritrichous
Answer : d
15. In motile Gram negative bacteria, the structure of flagella contains _____ rings.
a) one
b) two
c) three
d) four
Answer : d
16. The chemical nature of Pili ( fimbriae ) is ____ .
a) Carbohydrate
b) Protein
c) lipid
d) Fat
Answer : b
17. Peptidoglycan is made up of ______ .
a) Glycan stand
b) Tetrapeptide side chain
c) Cross linkage
d) All of these
Answer : d
18. The inner layer of gram negative cell wall consists of _____ .
a) Lipopolysaccharide
b) Peptidoglycan
c) Phospholipid
d) Lipoprotein
Answer : b
19. Convex lens is also called as ______ .
a) Diverging lens
b) Converging lens
c) Plane lens
d) Concave lens
Answer : b
20. Primary image is a magnified image produced by _____ .
a) Objective lens
b) Ocular lens
c) condenser lens
d) Planoconcave lens
Answer : a
21. The product of refractive index of the medium between object and objective & half angular aperture is called-
a) Refractive power
b) Resolving power
c) Numerical aperture
d) Working distance
Answer : c
22. Primary image is formed by placing the object _____ the focal point of the objective lens.
a) Inside
b) Outside
c) Within
d) All are incorrect
Answer : b
23. The refractive index of air is _____ .
a) 1.0
b) 2.0
c) 1.5
d) 2.5
Answer : a
24. Resolving power of microscope depends on _______ .
a) Wave length of light used for illumination
b) Numerical aperture
c) Wave length of light and Numerical
d) None of these
Answer : c
25. Which component of microscope allows the easy forward, backwards or either side ways movement of slide?
a) Base
b) Arm
c) Stage
d) Mechanical Stage
Answer : d
26. ______ are the organisms that utilize light as energy source .
a) Autotrophs
b) Chemotrophs
c) Phototrophs
d) Oligotrophs
Answer : c
27. ______ are the organisms that obtains energy by oxidation of organic compounds & use organic compound as principle carbon source.
a) chemoheterotrophs
b) chemoorganotrophs
c) chemorganohetrotrophs
d) all options are correct
Answer : d
28. Which among the following have same nutritional requirements?
a) photoheterotrophs & phot organotrophs
b) chemoheterotrophs & chemolithotrophs
c) photoautotrophs & photoorganotrophs
d) chemotrophs & phototrophs
Answer : a
29. Chemolithotrophs can also be termed as _____ .
a) chemoheterotrophs
b) photoautotrophs
c) chemoautotrophs
d) mixotrophs
Answer : c
30. Photoorganotrophs have same nutritional requirements as _____ .
a) chemotrophs
b) photoheterotrophs
c) chemolithotrophs
d) photolithotrophs
Answer : b
31. What type of electron source is used by photolithotrophs?
a) organic
b) inorganic
c) both organic and inorganic
d) all options are correct
Answer : b
32. Which among the following is the basic nutritional requirement contributing the major component of cell?
a) Carbon
b) Nitrogen
c) Phosphrous
d) Sulfur
Answer : a
33. What is Auxotrophs?
a) Organisms growing luxurious on general media
b) requires more amount of carbon & nitrogen source
c) requires growth factors and cannot synthesize it
d) organisms that cannot be cultivated in laboratory
Answer : c
34. Chemoheterotrophs requires _____ as electron source.
a) chemicals
b) inorganic chemicals
c) organic chemicals
d) none of these
Answer : c
35. TEM stands for
a) Transmission Electronic Microscopy
b) Transverse Electron Microscope
c) Transmission Electron Microscope
d) Terminal Electron Microscope
Answer : c
36. The electron gun generates electrons from _____ .
a) Tungsten filament
b) Halogen lamp
c) Fluorescent lamp
d) None of these
Answer : a
37. Sterilization by ___ is referred as cold sterilization.
a) Gases
b) Gamma rays
c) Ultraviolet rays
d) Visible rays
Answer : b
38. Which among the following is liquid at room temperature ?
a) Formaldehyde
b) Paraformaldehyde
c) Ethylene oxide
d) Beta propiolactone
Answer : d
39. Hexylresorcinol is employed as general antiseptic in ____ .
a) Mouth wash
b) Gargles
c) Cough drops
d) All of these
Answer : d
40. ______ is the time in minutes to reduce the population by 90%.
a) Thermal Death Point
b) Thermal Death Time
c) Partial reduction time
d) D-Value
Answer : d