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Biology Multiple Choice Questions and Answers for Different Competitive Exams

Multiple Choice Questions on Photosynthetic Pigments

1. Which of the following is a chlorophyll molecule lacking central Mg2+ ion?
a) chl a
b) bacteriochlorophyll 
c) chl c
d) pheophytin

2. The primary pigment in photosynthesis is  
a) chl a
b) chl b
c) chl a and chl b
d)  chl a, chl b and carotenoids

3. The pigments that gives brown colour to kelps or brown algae is
a) chl c
b) pheophytin
c) fucoxanthin
d) phycocyanin

4. Phycobilins (phycoerythrin and phycocyanin) are accessory pigments found in
a) green plants
b) blue green algae and red algae
c) blue green algae and diatoms
d) red algae and brown algae

5. Which of the following pigments are present in all photosynthetic plants?
a) chl a
b) chl a and b
c) chl a and carotenoids
d)  chl a, b and carotenoids

6. Instead of –CH3 group at the third C of the side group of Chl a, Chl b has
a) –COOH group
b) –CO group
c) –CHO group
d) –OH group

7. The photosynthetic activity of chlorophyll is maximum in
a) violet and red light
b) violet light
c) blue light
d) red light

8. Xanthophylls differ from carotenes (C40H56) in having
a) Mg
b) Cl
c) O2
d)  H
9. Which of the following is a water soluble pigment?
a) chl a
b) chl b
c) carotenoids
d) phycobilins

10. The photosynthetic pigments are located in  
a) chloroplast
b) grana
c) stroma
d) Thylakoid

Learn more: MCQ on Plant Sciences
Answers:
1. d) pheophytin
2. a) chl a
3. c) fucoxanthin
4 . b) blue green algae and red algae
5. c) chl a and carotenoids
6. c) –CHO group
(Chl a: C55H72MgN4O5; Chl b:  ‎C55H70MgN4O6 for more Chlorophyll a vs b)
7. d) red light
8. c) O2, (Carotenes: C40H56Xanthophyll: C40H56O2)
9. d) phycobilins
10. d) Thylakoid
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Multiple Choice Questions on Microtechnique Histology

1.Which of the following is an azodye
a) Safranin
b) Haematoxylin
c) Aniline blue
d) Orange G

2. Carnoy’s solution is a mixture of
a) Aqueous chromic acid, Aqueous acetic acid and distilled water
b) Ethyl alcohol, Glacial acetic acid and commercial formalin
c) Ethanol, Glacial acetic acid and Chloroform
d) Aqueous alcohol, Aqueous acetic acid and distilled water

3. The sectioning of woody materials for histo enzymological study is made
through----
sledge microtome
a)Rotary microtome
b) Sledge microtome
c) Cryotome
d) Rocking microtome

4. Sudan Black B is often used for visualization of
a) Protein
b) Carbohydrates
c) Aminoacids
d) Lipids

5. Chromatography that involves the separation of isomers
a) Counter-current chromatography
b) Chiral chromatography
c) Paper chromatography
d) Thin layer chromatography

6. The total volume of material, both solid and liquid in the column is known as
a) Void volume
b) Bed volume
c) Elution volume
d) Retension volume

7. Silica gel-G is used in
a) Thin layer chromatography
b) Column chromatography
c) HPLC
d) GLC

8. Histochemical localization of proteins is performed by using
a) Sudan black
b) Mercuric bromophenol blue
c) Periodic acid Schiffs (PAS) reagent
d) Iodine potassium iodide (IKI) solution

9. Orcein is obtained from
a) Fractionation of coal tar
b) Heartwood of Caesalpinia
c) Roccella tinctoria.
d) Abdominal part of insects Dactylopius coccus

10. Janus green B is used to stain
janus green B

a) Chloroplast
b) Golgi complex
c) Vacuoles
d) Mitochondria

Answers:
1. c) Aniline blue
2. c) Ethanol, Glacial acetic acid and Chloroform
3. b) Sledge microtome
4. d) Lipids
5. b) Chiral chromatography
6. b) Bed volume
7. a) Thin layer chromatography
8. b) Mercuric bromophenol blue
9. c) Roccella tinctoria.
10. d) Mitochondria
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Multiple Choice Questions on Plant Taxonomy

1. Level of taxonomic study concerned with the biological aspects of taxa, including intraspecific populations, speciation, evolutionary rates and trends
a) alpha taxonomy
b) beta taxonomy
c) gamma taxonomy
d) theta taxonomy

2. Labellum in Orchidaceae comes to anterior side by the twisting of the ovary
through 180 degree. This process is called
Labellum in Orchid

a) adnation
b) articulation
c) resupination
d) attenuation

3. The Commelinaceae family is commonly known as the
a) spiderwort family
b) aster family
c) grass family
d) lily family

4. Foeniculum vulgare belongs to the family
a)Rutaceae
b)Meliaceae
c)Apiaceae
d)Brassicaceae

5. When two or more authors publish a new species or propose a new name, their names are linked using the epithet?
a)In
b)ex
c)et
d)emend

6. Binomials with identical genus name and specific epithet are called
a)Homonym
b)Tautonym
c)Basionym
d)Synonym

7. A document containing a comprehensive account of a specific taxonomic group,
generally a genus or family is
a)Manual
b)Flora
c)Monograph
d)Revision

8. Which among the following is considered a demerit of the ‘Engler and Prantl’
system of classification?
a)Gymnosperms are placed between Monocotyledons and Dicotyledons
b)Gymnosperms are placed among Dicotyledons
c)Dicotyledons are placed before Monocotyledons
d)Dicotyledons are placed after Monocotyledons

9. The principles of Numerical taxonomy were developed by
a)Bentham And Hooker
b)Engler And Prantl
c)Sneath And Sokal
d)Takhtajan And Cronquist

10.The newly collected specimen which is used as a substitute, when the original
type material is missing in a herbarium, is designated as
a)Lectotype
b)Holotype
c)Neotype
d)Isotype

Answers:
1. c) gamma taxonomy
2. b) articulation
3. a) spiderwort family
4. c)Apiaceae
5. c)et
6. b)Tautonym
7. c)Monograph
8. d)Dicotyledons are placed after Monocotyledons
9. c)Sneath And Sokal
10. c)Neotype
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Multiple Choice Questions on Food Preservation

1. Pasteurization is the process of heating milk
a) above 1210C
b) above boiling point
c) below boiling point
d) above 1500C

2. The process of preserving food by rapid freezing followed by dehydration under vacuum is called
a) Lyophilisation
b) Sterilization
c) Cold Dehydration
d) Cryopreservation

3. ‘Cold sterilization’ refers to the preservation of food by
a) Refrigeration
b) Radiation
c) Dehydration
d) Lyophilisation

4. All the following techniques are household preservation technique except
a) Smoking
b) Lyophilisation
c) Dehydration
d) Salting

5. What is the purpose for blanching (immersing food in hot water) vegetables during canning?
a) to soften products to fill better
b) to denature enzymes that change colour, texture
c) to reduce microbial population
d) All of the above

6. Who is regarded as the father of canning?
a) Nicolas Appert
b) Louis Pasteur
c) John Hall
d) Bryan Dokin

7. The method of preventing or reducing pathogens in food products by combining many methods like high temperature during processing, low temperature during storage, increasing the acidity etc is called
a) Mixed preservation approach
b) High pressure food preservation
c) Hurdle technology
d) Stumbling technology

8. Which of the following methods dehydrates microbial cells by plasmolysis thereby killing them?
a) sugaring  
b) smoking
c) heating
d) Pasteurization

9. The reason for food spoilage is
a) Growth of microorganisms like bacteria, fungus etc or insects
b) Autolysis
c) Oxidation by air that causes rancidity or colour changes
d) all of the above

10. The process of preserving meat by stewing in a covered earthenware jug 
a) burial
b) curing
c) jugging
d) all of these
Answers:
1. c) below boiling point
2. a) Lyophilisation
3. b) Radiation
4. b) Lyophilisation
5. d) All of the above
6. a) Nicolas Appert
7. c) Hurdle technology
8. a) sugaring  
9. d) all of the above
10.c) jugging
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Multiple Choice Questions on Entomology

1. Which of the following is the smallest order of class Insecta?
a) Hemiptera
b) Odonata
c) Zeroptera
d) Coleoptera
2. Chewing and cutting type of mouth parts are found in
Mouth parts of insects


a) cotton leaf roller
b) coton jassid
c) Mustard aphid
d)army worm
3. The main characteristic feature of an insect is
a) three pair of legs
b) Presence of wings
c) Pair of antennae
d) all of these
4. Piercing and sucking type of mouth parts are found in
Mouth parts of insects

a) cotton leaf roller
b) coton jassid
c) Mustard aphid
d) pink boll worm
5. The damaging stage of red hairy caterpillar is
a) larva
b) nymph and adult
c) maggot
d) grub and adult
6. Chewing and biting type of mouth parts are found in
a) grass hopper
b) bettle
c) honeybee
d) obligate
7. The year in which destructive insect and pest act was enforced
a) 1914
b) 1954
c) 1964
d) 1974
8. The damaging stage of white grub is
a) larva
b) only adult
c) grub and adult
d) nymph and adult
9. The true name of BHC is
a) aldrin
b)HCN
c)rogor
d)LDJ
10. Which of the following insecticides is capable of controlling mites?
a) Toxaphene
b)Cypermethrin
c)endosulfan
Answers
1. c) Zeroptera
2. d)army worm
3. a) three pair of legs
4. c)Mustard aphid
5. a) larva
6. b) bettle
7. a) 1914
8. c)grub and adult
9. b)HCN
10. b)Cypermethrin
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Multiple Choice Questions on Floriculture

1. Calyx splitting is common practice in
a) Lily
b)Marigold
c) Gladiolus
d) Carnation
2. Silver thiosulphate is commonly used to exchange flower longevity in
Carnation

a) tulip
b) rose
c)lily
d)Carnation
3. In miniature carnations which operation is mostly practised?
a) Staking
b) long day
c)Pinching
d) none of these
4. First hybrid in Gladiolus was ----- developed in 1841
a)G. gandavensis
b)G.psittacinus
c)G.oppositiflorus
d)None of these.
5. Cyandin anthocyanin is present in-- colour
a) black
b)pink
c)bluish red
d)yellowish white
6. Which is most popular variety of roses in protected cultivation in India?
a)Grand gala
b)Konfetti
c)First red
d)All of these
7. Pelargenidin anthocyanin is present in --- colour
a)blue
b)white
c)yellow
d)orange red
8. Chemical defoliation in roses is done by
a)urea
b)auxin
c) GA
d) copper sulphate
9. Which is not a cultivar of China aster?
a) Rakhi
b) PG White
C) PG Violet
d)PG Purple
10. Plant form in Kochia is
a)informal
b)globular
c)conical
Answers
1. d) Carnation
2. d)Carnation
3. d) none of these
4. a)G. gandavensis
5. c)bluish red
6. c)First red
7. d)orange red
8. d) copper sulphate
9. a) Rakhi
10. d)columnar
Read More

Multiple Choice Questions on PCR Types

PCR types
1. Which of the following PCR technique is best suited for detection of point mutation in DNA?
a) RT PCR
b) PCR
c) Allele specific PCR
d) Anchored PCR

2. The PCR technique used to preferentially amplify only one strand of the target DNA by using unequal primer concentration is   
a) qPCR
b) Asymmetric PCR
c) Anchored PCR
d)  Nested PCR

3. The PCR technique widely used in bacterial genomic studies for screening of plasmid inserts is
a) Anchored PCR
b) Colony PCR
c) qPCR
d) pPCR

4. This PCR variant uses degenerate primers to amplify unknown sequences of DNA, related to a known DNA sequence is
a) Degenerate PCR
b) Multiplex PCR
c) Hotstart PCR
d) Inverse PCR

5. If the sequence of only one strand is known for primer synthesis, the best PCR variant that allows amplification of DNA with only one known sequence is
a) Hotstart PCR
b) Inverse PCR
c) Multiplex PCR
d) Nested PCR

6. The most efficient PCR technique that uses primer mix to detect deletions or duplications in a large gene is  
a) Anchored PCR
b) Nested PCR
c) Miniprimer PCR
d) Multiplex PCR

7. The PCR technique designed to minimize amplification of non-specific PCR products by using 2 primer sets is
a) Multiplex PCR
b) Mini primer PCR
c) Nested PCR
d) q PCR
8. The PCR variant designed for the study of RNA expression level is  
a) Reverse transcriptase or RT PCR
b) q PCR
c) Anchored PCR
d)  Traditional PCR

9. The following PCR technique allows measuring the DNA amplification at each cycle of PCR contrary to end point detection in traditional PCR
a) q PCR or Quantitative PCR
b) Reverse transcriptase or RT PCR
c) Asymmetric PCR
d) touchdown PCR

10. The PCR procedure, where Taq polymerase is added after the rest of the PCR components are heated to the DNA melting temperature, so as to avoid non-specific amplification at lower temperatures is
a) Asymmetric PCR
b) Hotstart PCR
c) Multiplex PCR
d) Nested PCR
Learn more:
Answers:
1. c) Allele specific PCR
2. b) Asymmetric PCR
3. b) Colony PCR
4 . a) Degenerate PCR
5. b) Inverse PCR
6. d) Multiplex PCR
7. c) Nested PCR
8. a) Reverse transcriptase or RT PCR
9. a) q PCR or Quantitative PCR
10. b) Hotstart PCR
Read More

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