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Free Download as PDF of Cell Biology Questions with Answers as per exam pattern, to help you in day to day learning. We provide all important questions and answers for all Exam.
25. The total magnification of a microscope with the low power lens (10X) and ocular lens (15X) in position would be _________
- [A] 25
- [B] 15
- [C] 150
- [D] 1500
Answer: Option [C]
26. Heat fixation accomplishes all the following expect ________.
- [A] helps the dye to penetrate the cells
- [B] kills the bacteria on the slide
- [C] decreases distortion of the cells prior to the addition of strains
- [D] fixes the organisms to the slid
Answer: Option [C]
27. If a bacterium measures 0.3 micrometer, it would measure how many angstroms?
- [A] 300
- [B] 30
- [C] 3000
- [D] 3
Answer: Option [C]
28. Which of the following would not be consistent with eukaryotic organisms?
- [A] membrane bound organelle
- [B] presence of histones
- [C] cell membranes lacking sterols
- [D] paired chromosomes
Answer: Option [B]
29. Which of the following methods is NOT used to determine bacterial numbers?
- [A] turbidity
- [B] serial dilution
- [C] direct microscopic counts
- [D] all the above
Answer: Option [D]
30. Endospores ________
- [A] are generally formed for protection and reproduction
- [B] are formed only when conditions become unfavorable.
- [C] contain dipicolinic acid and calcium
- [D] contain laminated layers of peptidoglycan called the exosporium
Answer: Option [C]
31. A specially calibrated counting chamber used with direct microscopic counts is called _________.
- [A] petroff hausser counter
- [B] haemocytometer counter
- [C] Geiger-Muller counter
- [D] Geiger-Müller photoelectron counter
Answer: Option [A]
32. The ratio of diameter of lenses to its focal length is referred as ________.
- [A] magnification
- [B] resolution
- [C] numerical aperture
- [D] focal length
Answer: Option [A]
33. Use of single stain to color the bacteria is commonly called as ________ staining
- [A] simple
- [B] Gram
- [C] differential
- [D] negative
Answer: Option [A]
34. A preserved culture maintained to keep its characteristics as originally defined is a _______
- [A] reference culture
- [B] standard culture
- [C] enrichment culture
- [D] selective culture
Answer: Option [A]
35. Pasteur is credited with all the following except ________.
- [A] construction of swan necked vessels
- [B] development of a vaccine for rabies
- [C] development of the technique for rabies
- [D] became the director of the Pasteur institute in Paris, France
Answer: Option [D]
36. One of the most important contributions of Robert Koch in his development of the germ theory of disease was the ________.
- [A] use of test animals in research
- [B] use of the microscope
- [C] development of the technique of pure culturing
- [D] development of the busen burner
Answer: Option [C]
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