Showing posts with label botany. Show all posts
Showing posts with label botany. Show all posts

Monday, May 9, 2011

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Zoology

1. In malaria, the product released by mosquito into blood that causes chill and fever, is called:
(a) Heamatin
(b) Schuffner’s dots
(c) Haemozoin
(d) Haemotoxin
Ans. (c)
2. In Amoeba, the contractile vacuole is present:
(a) Near the trailing end
(b) Near the advancing end
(c) At the middle of the body
(d) Any where inside the body
Ans. (a)
3. The trisomy for 21st chromosome is called:
(a) Down’s syndrome
(b) Turner’s syndrome
(c) Sickle cell anaemia
(d) Klinefelter’s syndrome
Ans. (a)
4. ‘Mammalian thymus’ is mainly concerned with:
(a) Regulation of body temperature
(b) Regulation of body growth
(c) Immunological functions
(d) Secretion of thyrotropin
Ans. (c)
5. Which of the following is the largest gland in an adult man?
(a) Thymus
(b) Liver
(c) Thyroid
(d) Pancreas
Ans. (b)
6. In Pheretima, septa are absent between which segments?
(a) 3/4 and 9/10
(b) 4/5 and 8/9
(c) 5/6 and 7/8
(d) 7/8 and 6/7
Ans. (a)
7. During emergency which of the following hormone is secreted?
(a) Aldosterone
(b) Thyroxine
(c) Adrenaline
(d) Calcitonin
Ans. (c)
8. In which of the following animals, respiration occurs without any respiratory organ?
(a) Frog
(b) Fish
(c) Cockroach
(d) Earthworm
Ans. (d)
9. In cockroach, larval and nymphal characters are maintained by:
(a) Ecdysone
(b) Salivary glands
(c) Parotid gland
(d) Juvenile hormone
Ans. (d)
10. Which of the following is a transparent tissue?
(a) Tendon
(b) Fibrous cartilage
(c) Hyaline cartilage
(d) All of these
Ans. (c)
11. Rh factor is present in:
(a) All vertebrates
(b) All mammals
(c) All reptiles
(d) Man and rhesus monkey only
Ans. (d)
12. In rabbit, end of a long bone is connected to another by:
(a) Tendon
(b) Ligaments
(c) Muscle
(d) Cartilage
Ans. (b)
13. Which of the following cell type is capable of giving rise to other cell types in sponges?
(a) Thesocytes
(b) Pinacocytes
(c) Cnidocytes
(d) Archaeocytes
Ans. (d)
14. Thigmotaxis is not shown by:
(a) Paramecium
(b) Amoeba
(c) Ascaris
(d) Hydra
Ans. (c)
15. Which is correctly matched?
(a) Apiculture—honey bee
(b) Pisciculture—silk moth
(c) Sericulture—fish
(d) Aquaculture—mosquito
Ans. (a)
16. Changes that allow the conversion of larva into adult, is called:
(a) Metagenesis
(b) Alternation
(c) Metamorphosis
(d) Metastasis
Ans. (c)
17. Which of the following is secreted by mast cell?
(a) Histamine
(b) Heparin
(c) Serotonin
(d) All of these
Ans. (d)
18. 5th cranial nerve of frog is called:
(a) Optic nerve
(b) Vagus
(c) Trigeminal
(d) Opthalmic
Ans. (c)
19. Animals having a built in thermostat to maintain constant body temperature are known as:
(a) biothermic
(b) poikilothermic
(c) oligothermic
(d) homeothermic
Ans. (d)
20. In earthworm, neurons are:
(a) Motor
(b) Associated
(c) Sensory
(d) All of these
Ans. (d)
21. In sex linkage, the specialty is:
(a) Atavism
(b) Criss-cross inheritance
(c) Reversion
(d) Gene flow
Ans. (b)
22. Vitamin-D is synthesized in skin by the action of sunlight on:
(a) Cholesterol
(b) 7-hydroxy cholesterol
(c) Cephalin cholesterol
(d) All of the above
Ans. (b)
23. The intermediate host of Schistosoma4s:
(a) Snail
(b) Mosquito
(c) Housefly
(d) Sheep
Ans. (a)
24. The islets of Langerhans are found in:
(a) Pancreas
(b) Stomach
(c) Liver
(d) Alimentary canal
Ans. (a)
25. In Klinefelter’s syndrome, the sex chromosome compliment is
(a) 22 A + XXY
(b) 22 A + XO
(c) 22 A + XY
(d) 22 A + XX
Ans. (a)

Botany

26. Lichen is the pioneer vegetation on which succession?
(a) Hydrosere
(b) Lithosere
(c) Psammosere
(d) Xerosere
Ans. (b)
27. Law of limiting factor was given by:
(a) Leibig
(b) Blackman
(c) Calvin
(d) Arnon
Ans. (b)
28. In Pinus, male cone bears a large number of:
(a) Ligules
(b) Anthers
(c) Micro-sporophylls
(d) Mega-sporophylls
Ans. (c)
29. Insectivorous plants grow in soil:
(a) Rich in nitrates
(b) Rich in phosphates
(c) Deficient in nitrates
(d) Rich in calcium
Ans. (c)
30. Induction of flowering by low temperature treatment is
(a) Vernalisation
(b) Cryobiology
(c) Photoperiodism
(d) Prunning
Ans. (a)
31. Decomposers are:
(a) autotrophs
(b) autoheterotrophs
(c) organotrophs
(d) heterotrophs
Ans. (c)
32. ‘Club moss’ belongs to:
(a) Algae
(b) Ptridophyta
(c) Fungi
(d) Bryophyta
Ans. (b)
33. Cleavage polyembryony occurs in:
(a) Pinus
(b) Mini Cycas
(c) Gycas
(d) Ephedra
Ans. (a)
34. Edible part of mushroom is:
(a) Basidiocarp
(b) Secondary mycelium
(c) Primary mycelium
(d) Tertiary mycelium
Ans. (a)
35. Which is the major crop in Asia?
(a) Rice
(b) Sugarcane
(c) Jowar
(d) Millet
Ans. (a)
36. Most nutritious among the following is:
(a) Wheat
(b) Maize
(c) Bajra
(d) Rice
Ans. (c)
37. Which of the following plant product is the hardest?
(a) Lignin
(b) Cutin
(c) Suberin
(d) Sporopollenin
Ans. (d)
38. ‘Ruminate endosperm’ is found in:
(a) Cruciferae
(b) Asteraceae
(c) Euphorbiaceae
(d) Annonaceae
Ans. (d)
39. Guttation is due to:
(a) Transpiration
(b) Root pressure
(c) Osmosis
(d) Diffusion
Ans. (b)
40. The following is used to get desired breed of plants.
(a) Tissue culture
(b) Genetic engineering
(c) Inbreeding
(d) Ikebana
Ans. (b)
41. For production of haploids, we culture:
(a) Shoot tip
(b) Anther
(c) Root tip
(d) None of these
Ans. (b)
42. Calyptra is derived from:
(a) Archegonia
(b) Capsule
(c) Antheridia
(d) Columella
Ans. (a)
43. Late blight of potato is caused by:
(a) Ustilago
(b) Pseudomonas
(c) Phytophthorc nfestans
(d) Colletotricum falcatum
Ans. (c)
44. ‘Clamp connection’ are observed in:
(a) Basidiomycetes
(b) Zygomycetes
(c) Ascomycetes
(d) Oomycetes
Ans. (a)
45. Leaf abscission is caused by:
(a) ABA
(b) cytokinin
(c) auxin
(d) gibberellin
Ans. (a)
46. What is the main cause for the extinction of some species in tropical forest?
(a) Deforestation
(b) Afforestation
(c) Pollution
(d) Soil erosion
Ans. (a)
47. Wilting of plant is due to:
(a) Blockage of phloem
(b) Blockage of xylem
(c) When some root and phloem are removed
(d) Tracheid is blocked
Ans. (b)
48. Most accepted theory for ascent of sap is:
(a) Capillarity theory
(b) Root pressure theory
(c) Pulsation theory
(d) Transpiration pull
Ans. (d)
49. Which enzyme converts glucose into alcohol?
(a) Zymase
(b) Diastase
(c) Invertase
(d) Lipase
Ans. (a)
50. Crop rotation helps in:
(a) Increase soil fertility
(b) Decrease soil erosion
(c) Decrease soil fertility
(d) Decrease water loss
Ans. (a)

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Free Biology Questions

Botany

1. Morphogenesis in plants is controlled by
(1) Auxins
(2) Gibberellins
(3) Cytokinins
(4) Abscisic acid
Ans. (4)
2. The non-auxin herbicide which is used to kill broad leaved plants in grass lawns is:
(a) Diquat
(b) Dinitrophenol
(c) Dalapon
(d) Dicamba
Ans. (c)
3. In tissue culture:
(a) Normal cells behave as cancer cell.
(b) Normal cells behave as normal cells
(C) Cancer cells behave as normal cells
(d) Cancer cells form callus
Ans. (a)
4. The plants of Cladophora crispata occur as:
(a) Epiphyte
(b) Endophyte
(c) Endozoic
(d) Epizoic
Ans. (d)
5. Which one of the following ratio is constant DNA of a species?
(a) A+T/G+C
(b) A+G/T+C
(c) A+C/T+G
(d) A+U/T+G
Ans. (a)
6. Mycorrhiza is:
(a) Association of root and bacteria
(b) Association of root and fungi
(c) Association of root and algae
(d) Parasitic root
Ans. (b)
Direction: In the following questions more than one of the answers given may be correct. Select the correct answers and mark it according to the code.
Codes:
(1) 1, 2 and 3 are correct
(2) 1 and 2 are correct
(3) 2 and 4 are correct ‘
(4) 1 and 3 are correct
7. Pollen tube of Cycas acts
(1) As an agent for carrying male. Gamete to the egg
(2) As a haustorium
(3) As endosperm
(4) As female cone
Ans. (2)
8. Which of the following conditions are necessary for the growth of the moulds, Mucor or Penicillium?
(1) Warmth
(2) Carbohydrate
(3) Water
(4) Light
Ans. (1)
9. Which of the following characteristics are associated with halophytes plants?
(1) Presence of pneumatophores
(2) Leaves and stem have hairy and waxy covering
(3) Shows viviparous germination
(4) Leaves show Heterophilly
Ans. (4)
10. The characteristic feature of leghaemoglobin are
(1) It is a source of energy
(2) It is a pinkish colour pigment found in nodules
(3) Activated by the presence of Mg2+ ions
(4) It protects nitrogen fixing enzyme nitrogenase from oxygen
Ans. (3)
11. Cyathium is characterized by
(1) Single female flower surrounded by many male flowers
(2) As involucres of bracts enclosing all the flowers
(3) Fleshy inflorescence axis with a pear shaped cavity inside
(4) Single male flower surrounded by many female flowers
Ans. (2)
12. Parietal placentation is found in the members of
(1) Family Cucurbitaceae
(2) Family Solanaceae
(3) Family Brassicaceae
(4) Family leguminosae
Ans. (4)
13. Which of the following is true regarding Guttation?
(1) Occurs through stomata
(2) Occurs through hydathodes
(3) Loss of pure water
(4) Occurs mostly during night and early morning
Ans. (3)
14. Which of the following statements are true for complementary genes?
(1) Both the genes interact to produce a complementary new trait
(2) Pair of nonallelic genes
(3) The F2 ratio is generally 9: 7
(4) The F2 ratio is generally 9: 3: 4
Ans. (1)
15. Coenzymes
(1) Act as a donor of groups of atoms added to the substrate
(2) Act as an acceptor of groups of atoms removed from the substrate
(3) Can not be easily separated from apoenzyme
(4) Do not act as prosthetic group
Ans. (2)
16. Suckers are
(1) Formed from the internodes of underground stem
(2) Formed from the node of underground stem
(3) Roots which are formed from the upper portion of nodes
(4) Roots which are formed from the lower portion of nodes
Ans. (3)
17. Non-cyclic photophosphorylation produces
(1) NADPH
(2) ATP and O2
(3) ATP only
(4) O2 only
Ans. (2)
18. C4 pathway occurs
(1) Only in monocots
(3) In most of the dicats
(2) In monocots
(4) In few dicots
Ans. (3)
19. Link between glycolysis, Krebs’ cycle and ?-oxidation of fatty acid or carbohydrate and fat metabolism is
(1) Acetyl CoA
(2) A compound formed by oxidative de-carboxylation
(3) A 2-carbon compound
(4) oxaloacetic acid
Ans. (1)
20. The enzymes taking part in recombinant DNA technology are
(1) Restriction Endonuclease
(2) Ligase
(3) Reverse transcriptase
(4) Phosphates
Ans. (2)
21. The mode of asexual reproduction in bacteria are
(1) Formation of gametes
(2) Endospore formation
(3) Conjugation
(4) Zoospores formation
Ans. (3)
22. Acid rain is caused by
(1) Sulphur dioxide
(2) Hydrogen chloride
(3) Nitrogen oxides
(4) Phosphates
Ans. (1)
23. Censer mechanism is found in
(1) Aristolochia
(2) Antlrrhinum
(3) Papaver
(4) Cletnatis
Ans. (1)
24. Aerenchyma is present in which of the following plants?
(1) Neptunia
(2) Potamogeton
(3) Bryophyllum
(4) Vallesneria
Ans. (3)
25. One internodes long phylloclade is found in
(1) Ruscus
(2) Opuntia
(3) Asparagus
(4) Calotropis
Ans. (4)

Zoology

1. Lymphoid tissue is found in:
(a) Thymus
(b) Tonsils
(c) Lymph nodes
(d) All of these
Ans. (d)
2. Most widely used bioweapon is:
(a) Bacillus subtilis
(b) Pseudomonas putida
(c) Bacillus anthracis
(d) None of the above
Ans. (c)
3. The vitamin which is essential for blood clotting is
(a) Vitamin-A
(b) Vitamin-B
(c) Vitamin-C
(d) Vitamin-K
Ans. (d)
4. The female genital pore of Pheretima posthuma located upon the segment?
(a) 14th
(b) 16th
(c) 18th
(d) 15th
Ans. (a)
5. Polyp phase is absent in:
(a) Hydra
(b) Aurelia
(c) Physalia
(d) Obelia
Ans. (b)
6. In frog heart, there are cardiac muscles which consist of fibres called
(a) Purkinje fibres
(b) Myonemes
(c) Telodendria
(d) Columnae camae
Ans. (a)
7. Malpighian tubules are:
(a) Excretory organs of insects
(b) Excretory organs of frog
(c) Respiratory organs of insects
(d) Endocrine glands of insects
Ans. (a)
8. Pacemaker is:
(a) AV node
(b) SA node
(c) Bundle of His
(d) Purkinje fibres
Ans. (b)
9. LH and FSH are collectively called:
(a) Oxytocin
(b) Somatotrophins
(c) Luteotrophic
(d) Gonadotrophins
Ans. (d)
10. Who is known as “father of Endocrinology”?
(a) R.H. Whittaker
(b) Pasteur
(c) Einthoven
(d) Thomas Addison
Ans. (d)
11. Which of the following provides most evident proof of evolution?
(a) Fossils
(b) Morphology
(c) Embryo
(d) Vestigial organs
Ans. (a)
12. In Mollusca, eye is present over a stalk, called:
(a) Ostractum
(b) Operculum
(c) Ommatophores
(d) Osphradium
Ans. (c)
13. Among the following, colonial insects are:
(a) Locusts
(b) Mosquitoes
(c) White ants
(d) Bed bug
Ans. (c)
14. In Ascaris, the coelom is:
(a) Schizocoelom
(b) Pseudocoelom
(c) True coelom
(d) Haemocoelom
Ans. (b)
15. ‘Turbellarians’ are free living:
(a) Nematodes
(b) Cestodes
(c) Flat worms
(d) Trematodes
Ans. (c)
16. The characteristic larva of phylum ‘Coelenterata’ is:
(a) Planula
(b) Cysticercus
(c) Rhabdiform
(d) Wriggler
Ans. (a)
17. Podocytes are the cells, present in:
(a) Cortex of nephron
(b) Inner wall of Bowman4s capsule
(c) Outer wall of Bowman s capsule
(d) Wall of glomerular capillaries
Ans. (b)
18. In rabbit, head of epididymis present at the head of the testis is called:
(a) Vas deferens
(b) Cauda epididymis
(c) Gubernaculum
(d) Caput epididymis
Ans. (d)
19. Tendons and ligaments are specialized types of:
(a) Nervous tissue
(b) Muscular tissue
(c) Epithelial tissue
(d) Fibrous connective tissue
Ans. (d)
20. In blood, CO2 is transported majorly as:
(a) Sodium carbonate
(b) Carboxyhaemoglobin
(c) Bicarbonate
(d) CO2 as such
Ans. (c)
21. Animals undergoes inactive stage during winter, is known as
(a) Aestivation
(b) Hibernation
(c) Adaptation
(d) Acclimatization
Ans. (b)
22. Kupffer cells are present in:
(a) Liver
(b) Small intestine
(c) Pancreas
(d) Thyroid gland
Ans. (a)
23. The embryo at 16 celled stages is known as:
(a) Morula
(b) Gastrula
(c) Blastula
(d) Blastomere
Ans. (a)
24. Contractile vacuole in protozoan Amoeba is meant for:
(a) Respiration
(b) Excretion
(c) Locomotion
(d) Osmoregulation
Ans. (d)
25. In which of the following, putrefying bacteria is present?
(a) Intestine
(b) Colon
(c) Stomach
(d) Liver
Ans. (a)