Way 2 Freshers

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1. Which of the following is/are form(s) of passive transport?

(A) Facilitated diffusion

(B) Simple diffusion

(C) Both (A) and (B)

(D) None of the above

2. During Hatch-Slack pathway CO 2 is fixed in the

(A) Chloroplast of bundle sheath cells

(B) Mitochondria

(C) Ribosomes

(D) None of the above

3. Chromosomes with median centromere and equal arms are termed

(A) Telocentric

(B) Acentric

(C). Metacentric

(D) Submetacentric

4. Puffs in salivary gland chromosomes represent the site of

(A) RNA synthesis

(B) Protein synthesis

(C) DNA replication

(D) All of the above

5. Lead is mainly considered

(A) Smoke and smog

(B) Air pollutant

(C) Soil pollutant

(D) Water pollutant

6. Which one of the following is a pseudocereal ?

(A) Oryza sativa

(B) Fagropyrum esculentum

(C) Triticum aestivum

(D) Zea mays

7. Some cucurbits are bitter in taste because of tbe presence of-

(A) Tartaric acid

(B) Proteins in lower quantity

(C) Starch in high quantity

(D) Tetracyclic triterpenes

8. The percentage ratio of natality over mortality is called-

(A) Vital index

(B) Biological clock

(C) Senescence

(D) Density-volume

9. Uneven thickening on the wall of collenchyma is found due to the deposition of

(A) Cutin

(B) Chitin

(C) Curcumin

(D) Cellulose and pectin

10. Population with adjacent geographic ranges is called

(A) Allometry (B) Sympatric

(C) Allopatric (D) Parapatric

11. Which of the following essential amino acids is not found in corn meal?

(A) Alanine

(B) Glutamic acid

(C) Glycine

(D) Tryptophan

12. The layer of cytoplasm forming the vacuole membrane is known as

(A) Cytoplasm

(B) Tonoplasm

(C) Nucleoplasm

(D) None of the above

13. ‘Little leaf or brinzal’ is caused by

(A) Viruses

(B) Bacteria

(C) Both (A) and (B)

(D) None of the above

14. The ‘Origin of Species’ of Darwin was published in the year

(A) 1959

(B) 1859

(C) 1869

(D) 1958

15. Transition zone between two ecosystem is known as

(A) Holard

(B) Ecard

(C) Biotype

(D) None of the above

16. CAM stands for crassulacian acid metabolism. The Crassulaceae is a family of

(A) Xerophytic plants growing only on rocks

(B) Flowering succulent plants

(C) Non-flowering succulent plants

(D) Non-vascular plants and certain bryophytes

17. ‘Pneumatophores’ are found in

(A) Cephaelis

(B) Ipomoea

(C) Both (A) and (B)

(D) Sonneratia

18. Which of the following is not a member of family Cruciferae or Brassicaceae ?

(A) Brassica campestris

(B) Brassica rapa

(C) Fragaria vesca

(D) Raphanus sativus

19. Which of the following members of Cyanobacteria is of colonial form?

(A) Gloeothece

(B) Aphanocapsa

(C) Both (A) and (B)

(D) None of the above

20. ‘Incipient nucleus’ is found in

(A) Spirogyra

(B) Riccia

(C) Nostoc

(D) All of the above

21. The common type of propagules which help in the vegetative propagation of lichens are

(A) lridia and soridia

(B) lridia and phylidia

(C) Phylidia and blastidia

(D) Soridia and blastidia

22. Which of the following is absent’ within a nucleotide’!

(A) Sugar

(B) Phosphate

(C) Nitrogenous base

(D)ATP

23. During what phase of meiosis do tetrads form?

(A) Prophase I

(B) Anaphase I

(C) Prophase II

(D) Anaphase.1I

24. The offspring of matings between two pure strains are called

(A) Hybrids

(B) P generation

(C) F2 generation

(D) Mutants

Botany (contd.)

25. Crossing over is an exchange of genetic material between nonsister chromatids of a bivalent during

(A) Meiosis I

(B) Meiosis II

(C) Mitosis

(D) All of the above

26. Who among the following said that the percentage of A + G equals 50% and the percentage of T + C equals 50% ?

(A) Hershey and Chase

(B) Jacob and Monad

(C) Griffith and Niescher

(D) None of the above

27. Biologists who study the sequence of organisms in the fossil record are

(A) Systematists

(B) Taxonomists

(C) Paleobiologists

(D) None of the above

28, The cretaceous period, during which flowering plants appeared,occurred approximately

(A) 280 million years ago

(B) 135 million years ago

(C) 1,35 billion years ago

(D) 80 milliol1 years ago

29. Bacteria that must have organic molecules both for energy and as a source of carbon are called

(A) Chemoautotrophs

(B) Photohetrotrophs

(C) Photoautotrophs

(D) Chemoheterotrophs

30. In allopatric speciation, the initial barrier to gene flow is

(A) Ecological

(B) Postzygotic

(C) Geographic

(D) None of the above

31. Saffron is obtained from

(A) Dried stigma of Crocus plant

(B) Dried flower of Papaver somniferum

(C) Dried flower of rose

(D) None of the above

32. The correct statement(s) for photosynthesis is/are

(A) It provides food either directly or indirectly for most living things

(B) It produces oxygen

(C) It provides energy to create today’s fossil fuels

(D) All of the above are correct

33. Cladode is found in

(A) Asparagus

(B) Opuntia

(C) Both (A) and (B)

(D) Hydrilla

34. Which of the following plants yielc!s the drug ‘ephedrine’ ?

(A) I Saraca indica

(B) Terminalia arjuna

(C) Adhatoda vasica

(D) None of the above

35. Grass stem elongates by the activity of

(A) Primary meristem

(B) Apical meristem

(C) Lateral meristem

(D) Intercalary meristem

36. Synergids are present at

(A) Chalazal end

(B) Micropylar end

(C) Both chalazal and micropylar ends

(D) Integument

37. The mitochondrial DNA differs from the nuclear DNA in

(A) That triplet UGA codes for tryptophan

(B) Being linear

(C) Being highly coiled and twisted

(D) Having A = T and G=C

38. Genotype is-

(A) Genetic composition of plastids

(B) Genetic composition of an individual

(C) Genetic composition of an organism

(D) Genetic composition of germ cells

39. To tolerate water stress, plants in deserts develop

(A) Long root system which reaches to the water level

(B) No stomatal activity

(C) Both (A) and (B)

(D) Stems which are modified into leaf-type

40. Which of the following plants is/are partial root parasite?

(A) Raffesia

(B) Monotropa

(C) Both (A) and (B)

(D) Santalum album

41. New systematics based on genetic interrelationship is

(A) Experimental taxonomy

(B) Chemotaxonomy

(C) Cytotaxonomy

(D) None of the above

?42. The floral formula of Ocimum sanctum is

((A) Br % O K (1/4) C (4/1) A 2+2 G (2)

(B) Br O K (2/4) C (4/2 ) A 9+1 G ( 2)

(C) Br % O K (4+2) C (2+4) A 9+1 G ( 1)

(D) None of the above

43. In which phase of mitosis the chromosomes are arranged around the equator of the spindle?

(A) Prophase (B) Anaphase

(C) Telophase (D) Metaphase

44. Which of these are found in all viruses?

(A) Proteins, nucleic acids, lipids and carbohydrates

(B) Envelope, nucleic acid and capsid

(C) DNA, RNA and protein

(D) Proteins and nucleic acids

(C) E. coli

(D) None of the above

46. The climatic conditions characteristics for taiga forest is

(A) Cold winter

(B) Cool summer

(C) Rainfall ranges between 40-100 em/year

(D) All of the above

47. The first metabolite of Krebs cycle is

(A) Pyruvic acid

(B) Acetyl-CoA

(C) a-ketoglutarate

(D) None of the above

48. The single-stranded DNA (SS-DNA) is found in

(A) Tobacco mosaic virus

(B) Reovirus

(C) Coliphage cI F x 174 virus

(D) All of the above

49. Failure of chromosomes to segregate properly is known as

(A) Nondisjunction

(B) Synaptonemal couple

(C) Translocation

(D) Karyotype