HORTICULTURE MCQS

851.     Pollination is a sexual process in which pollen is deposited on the stigma of the plant. It starts the process of fertilization and……

1. growth of pollen tube
2. seed formation
3. production of a fruit or seed coat
4. All of above

852.     Watermelon is a crop with floral biology

1. monoecious & cross-pollinated
2. dioecious & cross-pollinated
3. dioecious & self-pollinated
4. None of above

853.     A plant composed of two or more genetically different tissues is called

1. Sport
2. Chimera
3. Mutation
4. Hybrid

854.     Citrange citrus is the intergeneric hybrid, with its parents?

1. Poncirus and sweet orange
2. Poncirus and mandarins
3. Sweet orange and mandarins
4. Mandarins and sweet orange

855.     Megasporogenesis is the formation of which gametes?

1. Male
2. Female
3. Both of above
4. None of above

856.     A thin, delicate, cellulose inner layer in a pollen grain wall is known as

1. Intine
2. Exine
3. Colpi
4. All of above

857.     A plant useful in the study of plant genomes because of its small genome size is

1. Tulip spp.
2. Arabidopsis thaliana
3. Pisum sativum
4. Tobacco

858.     Most plant tissue cultures are initiated from

1. calluses
2. explants
3. embryoids
4. Cell suspension

859.     Pores in protoplasts may be opened to DNA by the application of

1. Magnetism
2. Enzymes
3. Electricity
4. None of above

860.     Which of the following are mismatched?

1. Protoplast isolation-hybrids
2. Homozygous plants-anther/pollen culture
3. Callus culture-differentiated tissues regenerate
4. All of above

861.     Plant transformation is

1. When a plant grown in culture generates increased genetic variation
2. When plant cells in suspension cultures form individual embryos that can grow into plants
3. The incorporation of foreign DNA into the plant genome
4. Both a and b

862.     Unlike the somatic cells of animals, plant cells can be grown in tissue culture and regenerate new plants

1. Because each cell contains the entire genome
2. Because plant cells can dedifferentiate and revert back to seeds
3. Because plant cells are able to express genes that weren’t previously expressed
4. None of above

863.     Phenolic compounds, a cause of medium browning, are mostly released by which plants

1. Succulents
2. Woody
3. Herbaceous
4. All of above

864.     What is the structural nature of enzymes?

1. Fat                 
2. Protein                    
3. Carbohydrates
4. Starch

865.     The male sterile plants due to cytoplasmic genes are termed as

1. Cytoplasmic
2. Genetic
3. Gametic
4. None of above

866.     Hyperhydric malformation occurring during in vitro propagation is termed

1. Contamination        
2. Vitrification
3. Browning
4. All of above

867.     The use of living organism or their by-products to modify human health and environment is

1. Tissue culture                    
2. Biotechnology     
3. Genetic engineering
4. Recombinant DNA

868.     The ability of somatic cells to grow into a complete plant is termed as

1. Somatic embryogenesis
2. Totipotency
3. Regeneration
4. All of above

869.     Somatic variation is occurred in which cells

1. Germ cells              
2. Somatic cells
3. Both of above                     
4. None of above

870.     Incompatibility, a problem in plants hybridization programs, can be overcome by

1. Somatic hybridization    
2. Endosperm culture
3. Embryo culture
4. All of above

871.     The process of formation of two or more embryos in the seed is known as

1. Apomixis
2. Polyploidy
3. Polyembryony
4. All of above

872.     The 2n number of chromosome in citrus is

1. 15
2. 18
3. 21
4. 24

873.     Which is not the method to check pollen viability in the laboratory?

1. Staining
2. In vitro culture
3. Fruit set
4. None of above

874.     The one reason of unfruitfulness in fruits may be

1. Heterostyly
2. Compatibility
3. Monoecy
4. None of above

875.     Polyembryony reflects the number of embryos per seed

1. One or more
2. Two or more
3. Both of above
4. None of above

876.     Which of the following is involved in seedless watermelon production?

1. Apomixis
2. Interspecific crosses
3. Tetraploidy
4. All of above

877.     The quickest way to produce homozygous breeding lines from heterozygous parents is through

1. Doubled haploids
2. Aneuploidy
3. Protoplast fusion
4. Allopolyploidy

878.     Which of the following is an example of an active meristematic tissue in plants?

1. Sclerenchyma
2. Cambium
3. Epidermis
4. Cuticle

879.     Which of the following describes an appropriate technique for commercially propagating chimeras?

1. Crossing the chimera with a normal plant of the same variety
2. Stimulating haploid female germ cells taken from the chimera to divide without being fertilized
3. Taking stem cuttings from the chimera and its descendents
4. All of above

880.     Which of the following accurately describes the role of restriction enzymes in genetic engineering?

1. Cutting sequences of double-strand DNA into fragments
2. Making multiple copies of gene sequences of single-strand DNA
3. Removing the nucleus of a cell and replacing it with another
4. None of above

881.     Mendel’s principle of independent assortment is best explained by the arrangement of chromosomes in

1. Telophase of mitosis
2. Metaphase of meiosis
3. Prophase of mitosis
4. All of above

882.     A variant among clones is known as

1. Variety                     
2. Strain                       
3. Clone
4. None of above

883.     A cell without cell wall is called

1. Protoplasm              
2. Protoplast             
3. Plasma
4. Cytoplasm

884.     A medium without addition of agar is called

1. Solid medium           
2. Liquid medium         
3. Cell suspension culture
4. Both b and c

885.     Fusion of nucleus of one plant cell with cytoplasm of the other cell is called

1. Heterokaryon                     
2. Homokaryon           
3. Cybrid
4. None of above

886.     Distilled water after autoclaving is known as

1. Deionized water     
2. Double distilled water    
3. Autoclaved water
4. All of above

887.     The genetic constitution of an organism is termed as

1. Gene              
2. Allele                      
3. Genotype
4. Phenotype

888.     A small circular molecule of double stranded DNA naturally occur in bacteria and yeast is called

1. Ti-plasmid                 
2. Plasmid                    
3. Plastid
4. All of above

889.     The temperature of the autoclave for the sterilization of culture medium is

1. 115C

890.     Which concentration of ethanol is generally applied for asepsis of explants?

1. 90%
2. 80%
3. 70%
4. 55%

891.     Which plant part is taken for isolation of protoplast in somatic hybridization?

1. Shoot            
2. Leaves                      
3. Both of above
4. None of above

892.     The regeneration of organs or organ-like structure or (pro) embryo from callus is termed as

1. De-differentiation 
2. Re-differentiation           
3. Differentiation
4. All of above

893.     Which group of plant hormones induces among other things, cell elongation and cell division?

1. Cytokinin    
2. Auxin            
3. Gibberellin
4. All of above

894.     A cell with two or more identical nuclei as a result of protoplast fusion is known as

1. Heterokaryon                    
2. Homokaryon
3. Both of above                     
4. None of above

895.     Haberlandt was the first who made attempts for cell cultures in the year

1. 1907               
2. 1909               
3. 1902
4. 1904

896.     All of the following are examples of evolution, except:

1. Mutations in an individual
2. Changes in an allele frequency in a species
3. Adaptive Radiation

897. DNA replication occurs in which phase?

1. Interphase
2. Prophase
3. Anaphase
4. Telophase

898.     When the ratio of auxin to cytokinin in tissue culture is low

1. Rooting can be induced in an explant
2. Shooting can be induced in callus
3. Cell division is promoted in explants to produce callus
4. All of above

899.     Mendel’s discovery that characteristics are inherited due to the transmission of hereditary factors resulted from his

1. Careful microscopic examinations of genes and chromosomes
2. Breeding experiments with many generations of fruit flies
3. Analysis of the offspring produced from many pea plant crosses
4. None of above

900.     A condition in which pollen is absent or non-functional in flowering plants is called

1. Incompatibility       
2. Sterility                  
3. Male sterility
4. Compatibility