A-PDF Page Cut DEMO: Purchase from www.A-PDF.com to remove the watermark
1. Pollen embryo sacs are

Pollen like embryo sacs


Embryo sacs developed from pollen


Pollen developed in embryo sac


Fused pollen and embryo sac


2. The layer of cel1s in the anther wall which helps in dehiscence of anther is called

Exothecium


Arnphithecium


Perithecium


Endothecium


J. The special structure to facilitate the entry ofpollen tube into the ovule is known as

Synergids


Endothecium


Obturator


Epistase


4. Primary endosperm cell generally contains a nucleus resulting from fusion of

Polar nuclei with a sperm nucleus


Polar nuclei with two sperm nuclei


Two polar nuclei with one sperm nucleus


None of these


BAC-28 2D
5. Seed consists of an .embryo surrounded by seed coat if

the embryo develops from the integument ofthe ovule and seed coat developed from the zygote


the embryo develops from the zygote and the seed coat develops


the embryo develops from the integuments of the ovule and seed coat develops from zygote


the embryo develops from the inner integument ofthe ovule and seed coat develops from zygote


6. Seed dormancy helps the plant in

Overcoming unfavourable climatic conditions


Preventing deterioration of seeds


Development of healthy seeds


Reducing viability


7. Potato scab mainly occurs In soil pH between

4·5-5·0


7·5-8·0


5·4-7-4


8·5 and above


8. Moko disease occurs in

Wheat


Banana


Potato


Rice


(Contd.)
9. Inhibition ofone organism by the metabolic product of another is called

Antibiosis


Parasitic


Acrasis


Oidiopsis


10. Bacterial blight of rice in India was first reported from

Tamil Nadu


Andhra Pradesh


Uttar Pradesh


Maharashtra


II. Protection of host plant from infection is called as

Chemotaxis


Antagonism


Prophylaxis


Autoecious


12. Grassy shoot disease of sugarcane shows

Symptom less


Different types of symptoms


Single type of symptom


Two types of symptoms


13. Induced systematic protection in diseased plants is due to enhanced


Amylase activity


Lipase activity


Cellulase activity


Peroxidase activity


BAC-28 3[
14. Actidione is used to control diseases of

Fungal


Bacterial


Mycoplasmal


Viral


15. The most commonly used transfer system for production of transgenics is

Pectinophora


Agrobacterium radiobacter


Agrobacterium tumifaciens


Spodoptera


16. The enzymes involved in pectin degradation are divided into

Only one category


2 categories


3 categories


4 categones


17. Binding components complementary to the host lectins present on surface of the pathogen are termed as

Suppressors


Receptors


Activators


Elicitors


18. Hypersensitive response occurs only in

Compatible combinations ofhost and pathogen


Incompatible combinations of host and pathogen


Only in susceptible host


None of the above


(Contd.)
19. Among following plants which is a rolling leaf Xerophyte

Casuarina


Begonia


Nerium


Saccharum


20. In India, Temperate forests are found in

Gujarat


Western Ghats


Himalayan range


Andamans


21. Which is a correct path of energy flow in an ecosystem

Decomposers


Decomposers


Decomposers


Decomposers


22. Major functional components of an ecosystem are

Food chain and decomposers


Mineral cycling and flow of energy


Energy flow and food chain


Energy flow and decomposers


BAC-28
23. Afforestation with the purpose of
environmental, .aesthetic and economic development is known as

Social forestry


Integrated afforestation


Agro forestry


Forest conservation


24. The main cause of deforestation in India
IS

Expansion of crop lands


Increased demand of forest products


Increase in human and livestock population


All the above


25. Which of the following ore of iron may be used to reclaim Usar soil

Iron pyrite


Iron alum


Magnetite


Limonite


26. Lichens are important in relation to atmospheric pollution as they

can purify the atmosphere


can be multiplied in polluted atmosphere


can grow extensively In greatly polluted atmosphere


are very sensitive and good indicator of atmospheric pollution


(ConId.)
27. Pollution caused by S02 and N02produces

Alkalinity


Acidity


Buffer action


All of the above


28. Sound above what level is considered to be noise pollution

Above 30 dB


Above 80 dB


Above 100 dB


Above 120 dB


29. 'Greenhouse' effect is related to

Global green algae


Cultivation of green plants


Vegetable cultivation in houses


Global warming


30. Water pollution due to presence of heavy metals can be corrected with the help of

Fungi


Lichens


Hyperaccumulator plants


Algae


31. Archaea represent a group of

Living organisms


Non-living organisms


Both living and non-living organisms


Neither living nor non-living organisms


BAC-28
32. Middle lamella is present between

Adjacent cells


Primary wall and secondary wall


Secondary wall and tertiary wall


Tertiary wall and cell membrane


33. Middle lamella is primarily made up of

Lignin


Pectin


Suberin


Cutin


34. "tau" protein is associated with

Polymerization of peptides


Depolymerization of peptides


Polymerization of tubulins


Depolymerization of tubulins


35. Extra Cellular Matrix is present in

Only higher plants


Only bacteria


Only animals


All of these


36. Cytoskeleion is responsible for

Only stability of cell shape


Only movements within cell


Only movements between cells


All of these


37. Cell cycle is regulaied by









SD
Carbohydraies Fatty acids Amino acids Proteins
(Contd.)
38. The structural unit of living organisms
.
was visualized for the first time by Jan Swammerdam

Spalanzani


Robert Hooke


Lois Pasteur


39. Largest period of cell cycle is

Interphase


Prophase


Metaphase


Anaphase


40. Which of the following sub-stages of Prophase I is longest in duration

Leptotene


Zygotene


Pachytene


Diplotene


4 I. Which one is the correct order

Gene-Muton-Recon-Cistron


Gene-Recon-Muton-eistron


Gene-Cistron-Muton-Recon


Gene-cistron-Recon-Muton


42. Split genes are characteristic of

Prokaryotes


Eukaryotes


Both, Prokaryotes and Eukaryotes


None of these


43. The functional segments of nucleotide chain in eukaryotic gene consists of

Introns


Exons


Both introns and exons


None of these


BAC-28 6D
44. The level ofcompaction, in DNA, achieved by the nucleosome sub-structure of chromatin is

7-fold


IO-fold


30-fold


42-fold


45. Nucleoplasmin plays an important role in

The digestion of nucleus


The replication of DNA


The assembly of nucleosomes


The deassembly of nucleosomes


46. Molecular banding of chromosomes, in plants, is often preferred over cytological banding techniques because

It is easier


It is cheaper


It is more reproducible and better defined


It is easier as well as cheaper


47. Ideal homozygosity is possible through

Haploidy


Selfing


Out-crossing


Multliple crossing


48. Crosses between diploid band triploid plants are practised to produce

Monosomics


Double monosomics


Trisomics


Nullisomics


(Contd.)
49. The genes for some trait present on non­homologous chromosomes are

Allels


Linked genes


Pseudoalleles


None of these


50. A gene that shows its effect on mOre than one character is called

Polygene


Modifying gene


Duplicate gene


Pleiotropic gene


51. A dwarf pea plant was treated with GA3. The plant became tall. The treated plant was then crossed with a homozygous tall pea. The results of F2 are expected to be

All tall


3 tall: I dwarf


I tall: I dwarf


All dwarf


52. Absolute linkage is found in

Birds


Snakes



QDrosophila


0Drosophila


53. Initiation codon of protein synthesis, in eukaryotes, is

GUA


GCA


CCA
AUG
BAC-28
54. DNA having labelled thymidine is allowed to replicate in the medium having non­radioactive thymidine. After three duplications, the DNA molecules having labelled thymidine shall be

One molecule


Two molecules


Three molecules


Four molecules


55. Protection against digestion of self DNA by a restriction enzyme is due to the action of

Proteases


Methylases


Endonucleases


Isoschizhomeras


56. The DNA that is obtained after the insertion of foreign gene into the vector DNA is called

Plasmid DNA


Phage DNA


Chimeric DNA


Transformed DNA


57. Isoschizoni'erases are those restriction enzymes which have

Similar clevage sites


Producing similar cohesive ends


Similar recoprition sequences


Either similar clevage sites or similar recoprition sequences


58. The following is an extemopthogen unit used as a biopesticide

Bacillus thurengenesis


Beauvaria bassiana


Spodoptera litura


Bt-gene


10 (CoUld.)
59. The following is one of the genes introduced into rice to produce "Golden
rice"

gene for geranyl diphosphate


gene for carotene acetylase


gene for phytoene synthase


gene for isopentyl diphosphate


60. The production of "Golden rice" involved the transfer of genes from the following

Daffodils


Daffodils and Erwinia


Erwinia and Agrobacterium


Agrobacterium and Daffodils


61. The famous Indian scientist known for DNA fingerprinting and forensic studies

Prof. Alec Jeffreys


Prof./Lalji Singh


Prof. Nandita Das


Prof. Pushpa Bhargava


62. The first commercially released transgenic plant is "

Bt-cotton


Monsanto cotton


Flavr Slavr


Golden rice


63. One of the following method is used in the culture of protoplast

MDA culture


PDA culture


LB broth culture


LB broth of protoplast


BAC-28
64. The following honnones help in promoting shoots in the regeneration of callers

HAP and Kinetin


HAP and IAA


IAA and Kinetin


IAA and


65. The plant derived vaccines are dependent on

Development of resistance


Production of plantibodies


Killing of the infected pathogenes


Production of plantigens


66. Phyforemediation refers to use of plants to

Protect environment


Protect water and soils


Clean the pollutants


Clear the pollutants of water and air


67. TMV consists of

DNA, RNA and Proteins


DNA and Proteins


RNA and Proteins


DNA and RNA


68. Which one of the following rank is morphologically similar and maintains its genetic isolation

Genus


Species


Family


Class


D (Contd.)
69. AIDS is due to

Bacterial infection


High Blood Pressure


Deficiency of riboflavin


Deficiency of T4 Lymphocytes


70. The transfer of genetic material from one bacterium to another through phages is known as

Hybridisation


Transduction


Translation


Transformation


71. Slime moulds are commonly found on

Decaying wood


Decaying fruit


Night soils


Mycorrhiza


72. LSD and ergot are obtained from a fungus belonging to class

Phycomycetes


Ascomycetes


Basidiomycetes


Deuteromycetes



73. Red rust of tea is caused due to

Harveyella


Cephaleuros


Trichodesmium


Gymnodinium


BAC-28 91
74. An advanced character ofbryophytes over thallophytes is

Absence of vascular tissue


Presence of flagellated gametes


Presence of jacketed sex organ


All of these


75. A fern commonly used as biofertilizer is

Azolla


Adiantum


Lycopodium


Marsilea


76. Endosperm in Gymnosperm is formed by the

Germination of a megaspore


Fusion of one male gamete with one polar nucleus


Fusion of one male gamete with two polar nuclei


Fusion of one male gamete with egg


77. Trimerous flowers are found in

Salix


Dracaena


Arachis


Nicotiana


78. Related species which are reproductively isolated but morphologically similar are termed as

Allopatric


Sympatric


Genotype


Siblings


(Contd.)
79. Valuable plant materials likely to become irretrievably lost in the wild or cultivation are kept preserved in viable conditions in

Gene library


Gene pool


Gene Bank


Bio-reserves


80. The loss of the sum total and variety of all the genes and their alleles present in a population or species is called

Genetic conservation


Genetic erosion


Species extinction


Gene pool


81. The extinction of Ginkgo bi/oba has been successfully controlled by

In situ conservation


Ex situ conservation


Germ plasm


Growing in biosphere reserves


82. Which one of the following is connected with conservation of forests

Bharatpur


Kaziranga


Silent Valley


All of these


83. Co[chium, Dendrobium, Nepenthes,

Podophyllum and Rauwolfia are

Extinct plant


Endangered plants


Avenue plants


Excise plants


BAC-28 IOD
84. The drug michellamine-B has been found to cure HIV (AIDS) disease. It is extracted from the leaves of

Ancistrocladus korupensis


Rauwolfia serpentina


Taxus baccata


Vinca rosea


85. Example of Old World crops are

Wheat, Sugarcane, Banana


Peanut, Tomato, Maize


Beet, Sunflower, Pineapple


Sunflower, Soybean, Guava


86. Which part of the plant is commonly used to obtain virus free clonal plants

Roots


Stem


Shoot apices


Seeds


87. What kind of plants are commonly met among Apocyanaceae, Asclepiadaceae and Euphorbiaceae

Timber plants


Petroleum plants


Fodder


Pomaceous plants


88. Endemic plants are

Gregarious in habit


Cosmopolitan


Restricted in occurrence


Found in Andamans


(eonld.)
89. An insecticidal alkaloid is

Azadirachtin


Reserpine


Rotenone


Nicotine


90. Exploration of underutilized plants is being done to

Conserve germ plasm


Procure resistance


Increase our Knowledge


Increase our resource base


91. The correct statement is

During transpiration water along with minerals is evaporated into the atmosphere


Rate of transpiration increases along with the rate of respiration


Plants with stem modified into phylloclade transpire less


Plants with succulent leaves transpire more


92. The osmotic potential of a solution IS denoted by the symbol
1j17t


IjIP


IjIs


93. Temporary wilting of plants is observed during midday of hot summers, this is because at high temperature

Stomata get closed


Rate of transpiration is higher than rate of absorption


Roots fail to absorb


Xylem becomes inactive


BAC-28 lID
94. The chief function of sieve tube element
is

to translocate the organic materials from source to sink


to conduct minerals


to transport water from roots to leaves


to help the plant in forming food


95. Water will be absorbed by root hairs when

concentration of salts in the soil is high


concentration of the salts in the cell sap is high


they are separated from the soil by a membrane


the plant is rapidly respiring


96. A free living Nz-fixing organism is

Spirogyra


Azotobactor


Rhizopus


Pseudomonas


97. Molybdenum ions are components of both

nitrate reductase and catalase


nitrogenase and urease


nitrate reductase and nitrogenase


catalase and amylase


(Conld.)
98. Enzyme concerned with ammonia assimilation is nitrogen reductase

urease


glutamine synthetase


Arginase


99. The organic acid which plays the key role in the synthesis of aminG acid is

Pyruvic acid


Malic acid


a-ketoglutaric acid


Oxaloacetic acid


100. For amino-transferases, the essential co­enzyme is
CoA

Pyridoxyl phosphate


DPN


NAD


101. In C4 plants N03 assimilation occurs

Bundle sheath cells


Mesophyll cells


Phloem parenchyma cells


Xylem vessels


102. Loss of water from leaves will be less if stomata

are only on the lower surface.


Fewer on the upper than the lower surface


Equal number on lower and upper surfaces


Only on upper surface


BAC-28
103. The enzyme whose catalytic activity is modulated through the non-covalent binding of specific metabolites at a site
on the protein other than the catalytic site is known as

Regulatory enzyme


Allosteric enzyme


Inducible enzyme


Repressible enzyme


104. Light driven production of ATP by chloroplast is known as

Photophosphorylation


Oxidative phosphorylation


Substrate level phosphorylation


ATP synthase


105. The number of ATP molecules required to initiate f3-oxidation is

2
3
4
106. The components of PSI are located on the

Stroma


Stroma thylakoid


Granum thylakoid


Outer surface of stroma and grand thylakoid


D (Contd.)
107. The final electron acceptor in pseudocyclic

electron transport in chloroplast is

NADP+


Ferredoxin


Oxygen


NAD"


108. The number of oxygen atoms utilized during the aerobic oxidation of one molecule of pyruvate is

12


6


5
3
109. Photolysis ofwater during photosynthesis occurs with the help of
PS II

PSI


Ferredoxin


Cytochrome f


110. The "lock and key" theory of enzyme structure and function was proposed by

Morgan


Robertson


Brown


Fischer


111. Mitochondria are

Storehouse of a cell as they grow very fast


Powerhouse ofa cell due to occurrence of a large number of enzymes and co-enzymes in them


Important for photosynthesis in plants


Helpful in nuclear division


BAC-28 131
112. Enzymes which occur in multiple molecular form within a plant system are called

Vitamins


Co-enzymes


Hormones


Iso-enzymes


113. Enzymes taking part in glycolysis are present in

Mitochondria


Cytoplasm


Both in mitochondria and cytoplasm


Vacuoles


114. In which ofthe following plant types both PEP-carboxylase and RuBP-carboxylase are present in the mesophyll and Chloroplasts

CAM


C4


C3


CAM and C4


115. A weedicide is alan

Gibberellin


Auxin


Cytokinin


All the above


116. Which hormone inhibits precocious germination and vivipary

Auxin


Gibberellin


Cytokinin


ABA


117. The hormone which has negative effect on apical dominance is

Auxin


Gibberellin


Cytokinin


Ethylene


(eonld.)
118. Some flowers open during the day and close at night. This is known as

Phototaxy


Photonasty


Phototropism


Photoperiodism


119. The ripening of fruits can be accelerated by

reducing the supply of water to the plant when the fruits are maturing


warming the surroundings artificially


keeping the fruits in cold storage


artificially adding ethylene gas to the atmosphere surrounding them


BAC-28
14D
120. A tetrasporic embryo sac is one in which
..

Megaspore'mother celI forms four megaspore nuclei alI of which form embryo sac


Megaspore mother celI' directly develops into embryo sac


.

All the four megaspore celIs take part in embryo sac formation


All four megaspores degenerate and the embryo sac develops from nucellar cells


SPACE FOR ROUGH WORK

BAC-28
15D