Nature and Scope of Biology MCQ (Multiple Choice Questions and Answers)
Question 1: The first microscope was invented by
(A) Leeuwenhoek
(B) Hooke
(C) Janssen and Z. Janssen
(D) Schleiden
Answer: (C)
Question 2: Father of microscopy and microbiology is
(A) Theophrastus
(B) Janssen
(C) Leeuwenhoek
(D) Hooker
Answer: (C)
Question 3: In electron microscopy, the lenses are
(A) Electric
(B) Photoelectric
(C) Electromagnetic
(D) Quartz
Answer: (C)
Question 4: Which is a pre-requisite for electron microscope
(A) Vacuum
(B) Living material
(C) Source of light
(D) Reflector Scanning
Answer: (A)
Question 5: Scanning Electron microscope is important for its images which are
(A) Very large and sharp
(B) Three-dimensional
(C) Fluorescent
(D) Two-dimensional
Answer: (B)
Question 6: Which one of the following microscopes can be used for studying unstained and dividing cells
(A) Electron microscope
(B) Phase-contrast microscope
(C) Polarising microscope
(D) All the above
Answer: (B)
Question 7: Ability to distinguish two closely placed points is
(A) Resolving power
(B) Video power
(C) Distinguishing power
(D) Magnifying power
Answer: (A)
Question 8: Resolving powers of human eye, compound microscope and electron microscope are respectively
(A) 100 μm, 0.25 μm and 10 Å
(B) 100 μm, 100nm and 100 Å
(C) 1 mm, 10 μm and 100 nm
(D) 1 mm, 0.5 μm and 1 Å
Answer: (A)
Question 9: As compared to light microscope, the resolving power of electron microscope is
(A) 10 times
(B) 50 times
(C) 1000 times
(D) 5000 times
Answer: (C)
Question 10: An Å is equal to
(A) 10-5 cm
(B) 10-6 cm
(C) 10-7 cm
(D) 10-8 cm
Answer: (D)
Question 11: The term microscope was coined by
(A) Janssen and Janssen
(B) Faber
(C) Robert Hooke
(D) Leeuwenhoek
Answer: (B)
Question 12: Class room compound microscope was invented by
(A) Kepler and Galileo
(B) Janssen and Janssen
(C) Tolles and Abbe
(D) Knoll and Ruska
Answer: (A)
Question 13: Compound microscope used by Robert Hooke had a magnification of
(A) 10 – 20
(B) 14 – 42
(C) 8 – 16
(D) 16 – 64
Answer: (B)
Question 14: Dyes that make cellular structures glow under UV-radiations are
(A) Fluorescent
(B) Fluorechromes
(C) Autolluorescent
(D) Phosphorescent
Answer: (B)
Question 15: High magnification of electron microscope is due to
(A) Electron beam
(B) Electromagnets
(C) High voltage
(D) Vacuum
Answer: (B)
Question 16: High resolving power of electron microscope is related to
(A) Electromagnets
(B) Long wavelength of electrons
(C) Short wavelength of electrons
(D) High voltage
Answer: (C)
Question 17: Which one is the most important in microscopy
(A) Resolving power
(B) Magnification
(C) Study of living cells
(D) Study of biochemicals
Answer: (A)
Question 18: Reflector of classroom microscope is
(A) Convex Ions
(B) Concave lens
(C) Concavo-convex lens
(D) Plano-concave lens
Answer: (D)
Question 19: Ocular lens occurs
(A) Nearer the slide
(B) On the path between reflector and object
(C) Nearer the eye
(D) Nearer the source of light
Answer: (C)
Question 20: Nose piece of microscope is
(A) Eye piece
(B) Capable of revolving
(C) Site for objective
(D) Both B and C
Answer: (D)
Question 21: Present-day condenser of the microscope was developed by
(A) Abbe
(B) Tolles
(C) Gesner
(D) Galileo
Answer: (A)
Question 22: Scientist to first employ mangnifying glass for studying living beings was
(A) Robert Hooke
(B) Huxley
(C) Gesner
(D) Tolles
Answer: (C)
Question 23: Rober B. Tolles is famous in microscopy for invention of
(A) Diaphragm
(B) Stage of the microscope
(C) Oil immersion lens
(D) Inbuilt illumination
Answer: (C)
Question 24: Dark field microscope was invented by
(A) Zsigmondy
(B) Zernicke
(C) Merten et al
(D) Caspersson
Answer: (A)
Question 25: Which of the following microscope is best for studying the process of mitosis
(A) Dark field microscope
(B) Phase contrast microscope
(C) Ultraviolet microscope
(D) Electron Microscope
Answer: (B)
Question 26: Which one requires cooling
(A) Electron Microscope
(B) Ultraviolet microscope
(C) Dark field microscope
(D) Interference microscope
Answer: (A)
Question 27: One micrometre (micron, μm) is equal to
(A) 0.1 mm
(B) 0.01 mm
(C) 0.001 mm
(D) 0.0001 mm
Answer: (C)
Question 28: A nanometre (nm) is
(A) 10-9 m
(B) 10-7 cm
(C) 10 Å
(D) All the above
Answer: (D)
Question 29: Which one is a proper unit for measurement
(A) Micron
(B) Angstrom
(C) Nanometre
(D) Alll the above
Answer: (C)
Question 30: Types of lenses used in a compound microscope are
(A) 3
(B) 2
(C) 1
(D) 4
Answer: (A)
Question 31: Lenses used in ultraviolet microscope are
(A) Class lenses
(B) Quartz fluorite
(C) Lithium fluoride
(D) Both B and C
Answer: (D)
Question 32: In which microscope direct observation is not possible
(A) Compound microscope
(B) Dark field microscope
(C) Phase contrast microscope
(D) Ultraviolet microscope
Answer: (D)
Question 33: Fluorescent screen or photographic plate is used for observation in
(A) Electron microscope
(B) Fluorescent microscope
(C) Ultraviolet microscope
(D) All the above
Answer: (D)
Question 34: Knoll and Ruska are famous for developing
(A) Ultraviolet micr„scope
(B) Polarising microscope
(C) Electron microscope
(D) X-ray crystallography
Answer: (C)
Question 35: Magnification of common oil immersion lens is
(A) 45 X
(B) 100 X
(C) 450 X
(D) 1000 X
Answer: (B)
Question 36: Which one combination of eye piece and objective would have widest field
(A) SX, SX
(B) SX, 10 X
(C) 10 X, 45 X
(D) 10 X, 100 X
Answer: (A)
Question 37: Organelle not possible to observe without electron microscope is
(A) Chloroplast
(B) Ribosome
(C) Mitochondrion
(D) Nucleolus
Answer: (B)
Question 38: Details of mitochondrial structure could be studied only after the discovery of
(A) Oil immersion lens
(B) Fluorescent microscope
(C) Electron microscope
(D) All the above
Answer: (C)
Question 39: Fluorescent microscope employs
(A) UV rays
(B) Polarised light
(C) Beam of electrons
(D) Both A and B
Answer: (A)
Question 40: A chemical which emits radiations of visible light after irradiation with UV rays is
(A) Fluorochrome
(B) Luminescent
(C) Metachrome
(D) Autofluorescent
Answer: (D)
Question 41: A fluorochrome is
(A) Quinacrine
(B) Fluorescein
(C) Rhodamine and auramine
(D) All the above
Answer: (D)
Question 42: A section prepared for examination under electron microscope is
(A) Ultrathin
(B) Macerated
(C) Thin
(D) Of any thickness
Answer: (A)
Question 43: Preparation of section for electron microscopy requires
(A) Microtomy
(B) Dehydration
(C) Metallic impregnation
(D) All the above
Answer: (D)
Question 44: Palladium or gold salts are used in staining section for
(A) Superior optical microscope
(B) Electron microscope
(C) Ultraviolet microscope
(D) Interference microscope
Answer: (B)
Question 45: Microtomy is
(A) Surgery of tissues
(B) Surgery of endocrine glands
(C) A new technique of surgery where incision is not visible
(D) Fine sectioning by machine
Answer: (D)
Question 46: Ultramicrotome cuts sections with the thickness of
(A) 1 – 5 μm
(B) 5 – 2.0 μm
(C) 100 – 500 μm
(D) 20 – 100 nm
Answer: (D)
Question 47: Microtome was invented by
(A) Abbe
(B) Tolles
(C) His
(D) Malpighi
Answer: (C)
Question 48: X-ray crystallography was developed by
(A) Bragg
(B) Kirkpatrick
(C) Astbury and Franklin
(D) Watson and Crick
Answer: (A)
Question 49: X-ray diffraction photomicrographs of DNA used for preparing DNA model by Watson and Crick were obtained by
(A) Bragg
(B) Kirkpatrick
(C) Astbury and Franklin
(D) White
Answer: (C)
Question 50: A scientist wants to study the structure of a protein. What technique would be useful
(A) Electrophoresis
(B) X-ray crystallography
(C) Density gradient centrifugation
(D) Microspectrophotometry
Answer: (B)