Multiple Choice Questions

Botany

Q: Algae differ from bryophytes in possessing:
A) Chlorophyll 'a' and 'b'
B) Aerobic respiration
C) Naked sex organs
D) Sex organs covered with sterile jacket
Q: Dominant pigment found in cyanobacteria is:
A) Chlorophyll 'a' and 'b'
B) Xanthophyll
C) Phycocyanin
D) Phycoerytgrin
Q: Nostoc is characteristic in having:
A) Uniflagellated spores
B) Sexual reproduction
C) Akinetes and heterocysts
D) All of above
Q: Physiological anisogamous sexual reproduction is found in:
A) Pinus
B) Mucor
C) Selaginella
D) Marsilea
Q: Zygotic meiosis takes place in:
A) Selaginella
B) Pinus
C) Spirogyra
D) Marsilea
Q: The sporophytic of funaria begins its development within:
A) Antheridium
B) Archaegoni um
C) Capsule
D) Protonema
Q: Gametophytic generation is dominant in:
A) Bryophyta
B) Pteridophyta
C) Gymnosperms
D) Angiosperms
Q: Fern prothallus is developed from:
A) Antherozoid
B) Elater
C) Oospore
D) Spore
Q: Winged pollen grains are characteristic feature of:
A) Cycas
B) Pinus
C) Ephedra
D) Gnetum
Q: Gill fungi belong to the order:
A) Agaricales
B) Uredinales
C) Ustilaginales
D) Melanconiales
Q: Dolipore septum is a feature of:
A) Oomycetes
B) Basidiomycetes
C) Ascomycetes
D) Deuteromycetes
Q: The members of the order uredinales are commonly called as:
A) Smuts
B) Downy mildews
C) Rusts
D) Powdery Mildews
Q: Most lichens are:
A) Homoiomerous
B) Heteromerous
C) Both
D) None of these
Q: A nucleoside differs from a nucleotide in not having:
A) Phosphate
B) Sugar
C) Nitrogen base
D) Phosphate and sugar
Q: A chromosome in which centromere is situated near one end is known as:
A) Metacentric
B) Sub-metacentric
C) Acrocentric
D) Telocentric
Q: DNA differs from RNA in having:
A) Cytosine but no guanine
B) Thymine but no cytosine
C) Uracil but no thymine
D) Thymine but no uracil
Q: Circular DNA molecule occurs in:
A) Viruses
B) Bacteria
C) Bacteria and chloroplast
D) Bacteria, chloroplast and mitochondria
Q: The nuclear spindle comprises fibers of:
A) One type
B) Two types
C) Three types
D) Four types
Q: Colchicine arrests which stage of mitosis?
A) Prophage
B) Metaphase
C) Anaphase
D) Telophase
Q: DNA-A has how many base-pairs in one turn?
A) 9
B) 10
C) 11
D) 12
Q: The branch of biological sciences that deals with the study of viruses is called:
A) Phycology
B) Virology
C) Bacteriology
D) Mycology
Q: Who is known as 'Father of Virology'?
A) W.M. Stanley
B) K.M. Smith
C) D.Ivanowski
D) F.C. Bawden
Q: The word 'virus' has been derived from:
A) Latin word
B) English word
C) Greek word
D) French word
Q: The first person who used the Lati8n term 'virus' in its correct sense?
A) W.M. Stanley
B) K.M. Smith
C) D.Ivanowski
D) F.C. Bawden
Q: A bacteriophage is:
A) A virus attacking a bacterium
B) A bacterium attacking a virus
C) A stage In the life cycle of a bacterium
D) A virus attacking another virus
Q: Which of the following is true of viruses?
A) They behave as if they are plants
B) They multiply in host cells only
C) They occur only inside bacteria
D) They are made up of proteins only
Q: Which of the following statements is correct?
A) All viruses contains RNA
B) Some viruses contain DNA and some RNA
C) Viruses do not contain nucleic acid
D) All viruses contains DNA
Q: Who crystallized virus for the first time?
A) W.M. Stanley
B) K.M. Smith
C) D.Ivanowski
D) F.C. Bawden
Q: During viral infection, the protein formed in host cells to resist is:
A) Interferon
B) Antitoxin
C) Antibody
D) Histone
Q: A naked RNA practice causing the symptoms like that of a viral disease is known as:
A) Virion
B) Viroid
C) Viral
D) none of these
Q: A viral disease of plant is:
A) Citrus canker
B) Brown rot of potato
C) Pea mosaic
D) Angular leaf spot
Q: Which disease are viral diseases?
A) Cholera and rabies
B) Typhoid and polio
C) Rabies and polio
D) Syphilis and common cold
Q: The spread of AIDS is promoted by:
A) Homosexuality
B) Immoral way of life
C) Use of infected needles in blood transfusion
D) All of these
Q: For defence against virus attacks, body produces:
A) Antibodies
B) Histamines
C) Antigens
D) Interferon
Q: The smallest known agent of a plant disease is:
A) Virus
B) Viroid
C) Bacteria
D) Mycoplasma
Q: Viruses are made up of:
A) Proteins and nucleic acids
B) Proteins and carbohydrates
C) Lipids and nucleic acids
D) Starch, proteins and lipids
Q: Phages that show lysogenic cycle are called:
A) Temperature Phages
B) Virulent Phages
C) Oncogenic Phages
D) Lytic Phages
Q: One Important character of viruses is that they:
A) Can multiply outside a living cell
B) Can be cultured in a cell free medium
C) Have an independent metabolism
D) Do not have an independent metabolism
Q: Cyanophages were discovered by:
A) Jacob and Monod
B) Schafferman and Morris
C) Lederberg and Zinder
D) Lederberg and Tatum
Q: A scientist wants to study the viral effects on plants. Which of the following parts of the plant should be excluded?
A) Phloem
B) Pith
C) Shoot apex
D) Cortex
Q: Edward Jenner discovered:
A) Vaccination against chicken pox
B) Immunization against polio
C) Vaccination against small pox
D) Immunization for chicken pox
Q: Viruses are considered to be:
A) Living organisms
B) Non-living organisms
C) A transitional group between non-living and living
D) Living organisms which have lost power of multiplication
Q: The smallest organisms which cause disease among plants are:
A) Viruses
B) Fungi
C) Mycoplasma
D) Bacteria
Q: TMV contains:
A) RNA and proteins
B) DNA and proteins
C) Both DNA and RNA
D) DNA
Q: Which of the followings are viral mosquito-borne disease?
A) Filariasis and typhus
B) Kala azar and diphtheria
C) Malaria and chagas disease
D) Yellow fever and dengue
Q: The filterable property of tobacco mosaic virus (TMV) was shown by:
A) Ivanowsky
B) Beijernick
C) Stanley
D) Winogradsky
Q: Mosaic symptom is commonly found in:
A) Bacterial disease
B) Fungal disease
C) Viral disease
D) All of these
Q: cauliflower mosaic viruses are:
A) Double-stranded DNA
B) Single-stranded RNA
C) Single-stranded DNA
D) Double-stranded RNA
Q: Sometimes when a virus attacks a bacterium, neither the virus multiplies nor does the bacterium die. This is phenomenon is called as:
A) Adsorption
B) Assimilation
C) Lysogeny
D) Viral stability
Q: Chemical compounds produced by the host plants in a defence reaction to pathogens are called:
A) Phytotoxins
B) Phytochrome
C) Phytoalexins
D) Phytohormones

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