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Question for JKPSC Assistant Professor Botany - Quiz / Questions / MCQ in English

Last Update on : October 12, 2026

Duration: 180 · Questions: 120 · Max Marks: 120

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Latest JKPSC Assistant Professor Botany Exam Question (Objective Questions), MCQ in English

Subjects : Concerned Subject (Botany)

Question Bank JKPSC Assistant Professor (Botany) Exam - English

Concerned Subject (Botany)

Q 1 :
Viruses are best described as:
  1. A.Free-living prokaryotes
  2. B.Obligate intracellular parasites
  3. C.Unicellular eukaryotes
  4. D.Saprophytic microorganisms
Q 2 :
The genetic material of a virus consists of:
  1. A.Both DNA and RNA simultaneously in all viruses
  2. B.Lipid only
  3. C.Protein only
  4. D.DNA or RNA
Q 3 :
The protein coat surrounding viral nucleic acid is called:
  1. A.Capsule
  2. B.Capsid
  3. C.Cell wall
  4. D.Envelope
Q 4 :
The morphological subunits of a viral capsid are known as:
  1. A.Capsomeres
  2. B.Ribosomes
  3. C.Plasmids
  4. D.Mesosomes
Q 5 :
Tobacco mosaic virus was first crystallized by:
  1. A.Robert Koch
  2. B.W.M. Stanley
  3. C.Louis Pasteur
  4. D.Martinus Beijerinck
Q 6 :
The genetic material of Tobacco mosaic virus (TMV) is:
  1. A.Double-stranded DNA
  2. B.Single-stranded DNA
  3. C.Double-stranded RNA
  4. D.Positive-sense single-stranded RNA
Q 7 :
TMV possesses which type of symmetry?
  1. A.Icosahedral
  2. B.Complex
  3. C.Helical
  4. D.Cubical
Q 8 :
The TMV particle is approximately:
  1. A.300 nm long
  2. B.30 nm long
  3. C.3 µm long
  4. D.300 µm long
Q 9 :
The diameter of a TMV particle is approximately:
  1. A.18 nm
  2. B.180 nm
  3. C.1.8 µm
  4. D.0.18 nm
Q 10 :
The central canal of TMV is approximately:
  1. A.0.4 µm in diameter
  2. B.40 nm in diameter
  3. C.400 nm in diameter
  4. D.4 nm in diameter
Q 11 :
Approximately how many coat protein subunits are present in a TMV particle?
  1. A.213
  2. B.2130
  3. C.21,300
  4. D.130
Q 12 :
Each turn of the TMV helix contains approximately:
  1. A.6 protein subunits
  2. B.16⅓ protein subunits
  3. C.60 protein subunits
  4. D.100 protein subunits
Q 13 :
The RNA of TMV is located:
  1. A.Outside the capsid
  2. B.Inside a nucleus
  3. C.Inside a lipid membrane only
  4. D.Within the helical protein coat
Q 14 :
TMV commonly infects plants belonging to the family:
  1. A.Poaceae
  2. B.Solanaceae
  3. C.Fabaceae
  4. D.Brassicaceae
Q 15 :
A characteristic symptom produced by TMV is:
  1. A.Mosaic mottling of leaves
  2. B.Root nodulation
  3. C.Crown gall
  4. D.White rust
Q 16 :
TMV is commonly transmitted from plant to plant by:
  1. A.Nematodes only
  2. B.Mosquitoes
  3. C.Mechanical contact
  4. D.Fungal spores only
Q 17 :
Replication of TMV occurs primarily in the:
  1. A.Mitochondrial matrix exclusively
  2. B.Host nucleus only
  3. C.Chloroplast DNA
  4. D.Host cell cytoplasm
Q 18 :
TMV RNA acts directly as:
  1. A.Ribosomal RNA
  2. B.Transfer RNA
  3. C.Messenger RNA
  4. D.DNA primer
Q 19 :
The enzyme responsible for synthesis of complementary RNA during TMV replication is:
  1. A.RNA-dependent RNA polymerase
  2. B.DNA-dependent DNA polymerase
  3. C.Reverse transcriptase only
  4. D.DNA ligase
Q 20 :
Movement of TMV from one plant cell to another occurs mainly through:
  1. A.Root hairs
  2. B.Stomata only
  3. C.Xylem vessels exclusively
  4. D.Plasmodesmata
Q 21 :
TMV movement protein primarily helps in:
  1. A.Viral DNA integration
  2. B.Nitrogen fixation
  3. C.Cell-to-cell movement of viral RNA
  4. D.Formation of bacterial spores
Q 22 :
Systemic movement of plant viruses generally occurs through the:
  1. A.Phloem
  2. B.Epidermis only
  3. C.Cork cambium
  4. D.Root cap
Q 23 :
One classical method for purification of TMV involves:
  1. A.Differential centrifugation
  2. B.Gram staining
  3. C.Autoclaving
  4. D.Acid-fast staining
Q 24 :
Ammonium sulfate may be used during virus purification for:
  1. A.Photosynthesis
  2. B.DNA mutation
  3. C.Cell wall synthesis
  4. D.Protein precipitation
Q 25 :
Chemically, purified TMV consists mainly of:
  1. A.Chitin and RNA
  2. B.DNA and lipid
  3. C.Cellulose and DNA
  4. D.RNA and protein
Q 26 :
The infectious component of TMV was demonstrated to be:
  1. A.RNA
  2. B.Coat protein
  3. C.Lipid envelope
  4. D.Carbohydrate
Q 27 :
Cauliflower mosaic virus (CaMV) contains:
  1. A.Double-stranded DNA
  2. B.Positive-sense ssRNA only
  3. C.Negative-sense ssRNA
  4. D.Double-stranded RNA
Q 28 :
CaMV belongs to the family:
  1. A.Tymoviridae
  2. B.Virgaviridae
  3. C.Caulimoviridae
  4. D.Retroviridae
Q 29 :
CaMV is described as a pararetrovirus because it:
  1. A.Contains only proteins
  2. B.Contains no nucleic acid
  3. C.Replicates only inside bacteria
  4. D.Replicates through an RNA intermediate using reverse transcription
Q 30 :
CaMV particles show predominantly:
  1. A.Icosahedral symmetry
  2. B.Helical symmetry
  3. C.Filamentous symmetry
  4. D.No organized symmetry
Q 31 :
CaMV commonly infects members of:
  1. A.Pinaceae
  2. B.Brassicaceae
  3. C.Poaceae
  4. D.Cycadaceae
Q 32 :
An important vector of CaMV is:
  1. A.Aphid
  2. B.Earthworm
  3. C.Honeybee
  4. D.Snail
Q 33 :
The widely used CaMV 35S promoter is important in:
  1. A.Gram staining
  2. B.Plant genetic engineering
  3. C.Fungal mating
  4. D.Bacterial sporulation
Q 34 :
CaMV DNA replication involves the enzyme:
  1. A.Catalase only
  2. B.Reverse transcriptase
  3. C.Nitrogenase
  4. D.Cellulase
Q 35 :
Turnip yellow mosaic virus (TYMV) has:
  1. A.Negative-sense RNA only
  2. B.Double-stranded DNA
  3. C.Single-stranded DNA
  4. D.Positive-sense single-stranded RNA
Q 36 :
TYMV particles possess:
  1. A.Icosahedral symmetry
  2. B.Helical rod-shaped symmetry
  3. C.Complex head-tail symmetry
  4. D.Filamentous bacterial structure
Q 37 :
TYMV belongs to the family:
  1. A.Reoviridae
  2. B.Caulimoviridae
  3. C.Virgaviridae
  4. D.Tymoviridae
Q 38 :
TYMV primarily causes:
  1. A.Yellow mosaic symptoms
  2. B.Crown gall
  3. C.Root knot
  4. D.Damping-off
Q 39 :
TYMV is commonly associated with plants of the family:
  1. A.Pinaceae
  2. B.Orchidaceae
  3. C.Brassicaceae
  4. D.Liliaceae
Q 40 :
Which of the following is NOT a common mechanism of plant virus transmission?
  1. A.Mechanical inoculation
  2. B.Insect vectors
  3. C.Seeds
  4. D.Binary fission of viral particles
Q 41 :
Persistent transmission of plant viruses is commonly associated with:
  1. A.Rocks
  2. B.Insect vectors
  3. C.Atmospheric nitrogen
  4. D.Soil minerals alone
Q 42 :
Which insect group is particularly important in plant virus transmission?
  1. A.Termites only
  2. B.Dragonflies
  3. C.Butterflies only
  4. D.Aphids
Q 43 :
Vegetative propagation can spread plant viruses because:
  1. A.Viruses cannot occur in vegetative tissues
  2. B.Infected propagules retain the virus
  3. C.Viruses are destroyed during cutting
  4. D.Viral RNA becomes bacterial DNA
Q 44 :
One effective strategy for controlling plant viral diseases is:
  1. A.Use of virus-free planting material
  2. B.Increasing vector populations
  3. C.Planting infected seeds
  4. D.Avoiding field sanitation
Q 45 :
Removal of virus-infected plants from a field is called:
  1. A.Stratification
  2. B.Grafting
  3. C.Scarification
  4. D.Roguing
Q 46 :
Control of insect vectors helps prevent:
  1. A.Transmission of many plant viruses
  2. B.Formation of plant chlorophyll
  3. C.Nitrogen fixation
  4. D.Fungal heterothallism
Q 47 :
Bacteriophages infect:
  1. A.Bacteria
  2. B.Fungi exclusively
  3. C.Plants exclusively
  4. D.Protozoa exclusively
Q 48 :
T4 bacteriophage has a:
  1. A.Simple helical rod structure
  2. B.Head-and-tail structure
  3. C.Naked circular RNA structure
  4. D.Fungal hyphal structure
Q 49 :
The head of T4 bacteriophage contains:
  1. A.Lipid only
  2. B.Single-stranded RNA
  3. C.Protein only
  4. D.Double-stranded DNA
Q 50 :
The function of tail fibers in T4 phage is primarily:
  1. A.Protein synthesis
  2. B.Attachment to the host bacterium
  3. C.Photosynthesis
  4. D.ATP production

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