Nature and Scope of Biology Questions and Answers

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)