sample Paper Biology pmt

sample Paper Biology pmt
SAMPLE PAPER FOR CBSE PMT/PET/AIEEE BIOLOGY
pmt sample papers biology
CBSE PMT Biology Screening Model Paper

1. Hormogonia are the vegetative reproductive structures of

(a) Chlamydomonas

(b) Spirogyra

(c) Oscillatoria

(d) Ulothrix

Ans. (c)

2. Azotobacter and Beijerinckia are the examples of

(a) Symbiotic nitrogen-fixers

(b) Non-symbiotic nitrogen-fixers

(c) Ammonifying bacteria

(d) Disease causing bacteria

Ans. (b)

3. Smilax a climbing genus belongs to

(a) Cucurbitaceae

(b) Solanaceae

(c) Liliaceae

(d) Cruciferae

Ans. (c)

4. In certain parts of India, muscular dystrophy is commonly found amongst the poor people because they eat cheap pulse from the plant

(a) Pisum satiuvm

(b) Lathyrus sativus

(c) Cicer arietmum

(d) Phaseolus mungo

Ans. (b)

5. If a dwarf pea plant was treated with gibberellic acid, it became as tall, as tall pea plants. If these pea plants are crossed with pure tall pea plants, what will be the phenotypic ratio in F1 generation?

(a) All dwarf plants

(b) 50% tall and 50% dwarf plants

(c) 75% tall and 25% dwarf plants

(d) 100% tall plants

Ans. (d)

6. Coichicine is obtained from Colchicum autumnal. It belongs to family

(a) Leguminoceae

(b) Solanaceae

(c) Asteraceae

(d) Liliaceae

Ans. (d)

7. Moll’s experiment explains that

(a) Carbon dioxide is essential for photosynthesis

(b) Chlorophyll and water are necessary for photosynthesis

(c) Light and water are essential for photosynthesis

(d) All of the above are correct

Ans. (a)

8. Energy transfer from one traphic level to other in a food chain is

(a) 10%

(b) 20%

(c) 1%

(d) 2%

Ans. (a)

9. Stem is reduced in

(a) Rhizome

(b) Corm

(c) Bulb

(d) Tuber

Ans. (c)

10. Heterophilly of Limnophila is

(a) Environmental

(b) Developmental

(c) Habitual

(d) Adaptive

Ans. (d)

11. Synandrous c9ndition is the fusion of

(a) Filaments only

(b) Both filaments and anthers

(c) Anthers only

(d) Petals

Ans. (b)

12. Which one yields sunn hemp?

(a) Corchorus

(b) Hibiscus-.

(c) Crotolaria

(d) Cannabis

Ans. (c)

13. Rod-shaped elongated thick-walled lignified dead cells found in seed coat of pulses

(Legumes) are

(a) Macrosciereids

(b) Astrosclereids

(c) Brachysclereids

(d) Osteosclereids

Ans. (a)

14. Decot root having more than six vascular bundles are found in

(a) Pea

(b) Sunflower

(c) Ficus

(d) Ranunculus

Ans. (c)

15. Regulator gene controls chemical synthesis (Operon concept) by

(a) Inhibiting transcription of mRNA

(b) Inhibiting enzymes

(c) Inhibiting passage of mRNA

(d) Inhibiting substrate enzyme reaction

Ans. (a)

16. ‘Illegitimate crossing over’ is another term for

(a) Transition

(b) Transversion

(c) Reciprocal translocation

(d) None of the above

Ans. (c)

17. A substance unrelated to substrate but capable of reversibly changing activity of enzyme by binding to a site other than active site is called

(a) Competitive inhibitor

(b) Non-competitive inhibitor

(c) Catalytic inhibitor

(d) Allosteric modulator/inhibitor

Ans. (d)

18. Golgi apparatus is absent in

(a) Higher plants

(b) Yeast

(c) Bacteria and blue-green algae

(d) Liver cells

Ans. (c)

19. Which one is common amongst nucleus, chloroplast and mitochondria?

(a) Cristae

(b) Thylakoids

(c) Nucleic acid

(d) Carbohydrate metabolism

Ans. (c)

20. Sporocarp is a reproductive structure of

(a) Some algae

(b) Some aquatic ferns

(c) Angiosperms having spores

(d) Bryophytes

Ans. (b)

21. Pond ecosystem shows

(a) Inverted pyramid of number

(b) Inverted pyramid of biomass

(c) Upright pyramid of biomass

(d) Inverted pyramid of energy

Ans. (b)

22. Under anaerobic conditions, bacterium

Pseudomonas changes

(a) Nitrate to molecular nitrogen

(b) Nitrate to ammonia

(c) Nitrate to nitrite

(d) Nitrite to nitrate

Ans. (a)

23. Deciduous forests have

(a) Variety of grasses

(b) Broad-leaved trees

(c) narrow-leaved trees

(d) Variety of crocodiles

Ans. (b)

24. Physiologically active form of Phytochrome is

(a) P730/Fr

(b) P660/Pr

(c) P700

(d) P680

Ans. (a)

25. The archesporium of ovule is

(a) Single celled terminal

(b) Single celled central

(c) Single celled hypodermal

(d) Single celled lateral

Ans. (c)

Section-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

26. 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)

27. 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)

28. Latex vessels are found in

(1) Calotropis .r

(2) Hevea

(3) Oleander

(4) Papaya

Ans. (3)

29. 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)

30. 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)

31. 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)

32. Parietal placentation is found in the members of

(1) Family Cucurbitaceae

(2) Family Solanaceae

(3) Family Brassicaceae

(4) Family leguminosae

Ans. (4)

33. 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)

34. 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)

35. 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)

36. 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)

37. Non-cyclic photophosphorylation produces

(1) NADPH

(2) ATP and O2

(3) ATP only

(4) O2 only

Ans. (2)

38. C4 pathway occurs

(1) Only in monocots

(3) In most of the dicats

(2) In monocots

(4) In few dicots

Ans. (3)

39. 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)

40. The enzymes taking part in recombinant DNA technology are

(1) Restriction Endonuclease

(2) Ligase

(3) Reverse transcriptase

(4) Phosphates

Ans. (2)

41. The mode of asexual reproduction in bacteria are

(1) Formation of gametes

(2) Endospore formation

(3) Conjugation

(4) Zoospores formation

Ans. (3)

42. Acid rain is caused by

(1) Sulphur dioxide

(2) Hydrogen chloride

(3) Nitrogen oxides

(4) Phosphates

Ans. (1)

43. Censer mechanism is found in

(1) Aristolochia

(2) Antlrrhinum

(3) Papaver

(4) Cletnatis

Ans. (1)

44. Aerenchyma is present in which of the following plants?

(1) Neptunia

(2) Potamogeton

(3) Bryophyllum

(4) Vallesneria

Ans. (3)

45. One internodes long phylloclade is found in

(1) Ruscus

(2) Opuntia

(3) Asparagus

(4) Calotropis

Ans. (4)

46. In a dicot plant, the epibasal tier forms

(1) Cotyledons

(2) Plumule

(3) Hypocotyls

(4) Radical

Ans. (2)

47. Morphogenesis in plants is controlled by

(1) Auxins

(2) Gibberellins

(3) Cytokinins

(4) Abscisic acid

Ans. (4)

48. Which of the following chemical reactions are associated with photorespiration?

Ans. (1)

49. Agar-agar is

(1) A jelly like substance, employed in the manufacture of ice cream

(2) Used in culture medium for microorganisms as solidifying agent

(3) Obtained from Gelidium, Gracilaria

(4) a product of brown algae

Ans. (1)

50. Epigeal germination occurs

(1) Due to the growth and elongation of hypocotyls

(2) In papaya and cotton

(3) In maize and rice

(4) Due to elongation of epicotyls

Ans. (2)