1. Select the mismatch :
1) Rhodospirillum - Mycorrhiza
2) Anabaena - Nitrogen fixer
3) Rhizobium - Alfalfa
4) Frankia - Alnus
2. The DNA fragments separated on an agarose gel can be visualised after staining with :
1) Acetocarmine   
2) Aniline blue
3) Ethidium bromide
4) Bromophenol blue
3. The vascular cambium normally gives rise to :
1) Primary phloem
2) Secondary xylem
3) Periderm        
4) Phelloderm
4. Which of the following facilitates opening of stomatal aperture ?
1) Decrease in turgidity of guard cells
2) Radial orientation of cellulose microfibrils in the cell wall of guard cells
3) Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
4) Contraction of outer wall of guard cells
5. In Bougainvillea thorns are the modifications of :
1) Adventitious root     2) Stem
3) Leaf         4) Stipules
6. Root hairs develop from the region of :
1) Elongation     2) root cap
3) Meristematic activity
4) Maturation
7.The final proof for DNA as the genetic material came from the experiments of :
1) Hershey and Chase
2) Avery, Mcleod and McCarty
3) Hargobind Khorana
4) Griffith
8. Which of the following is made up of dead cells?
1) Collenchyma     (2) Phellem
3) Phloem
4) Xylem parenchyma
9. An example of colonial alga is :
1) Volvox         2) Ulothrix
3) Spirogyra         4) Chlorella
10. Which of the following in sewage treatment removes suspended solids ?
1) Secondary treatment
2) Primary treatment
3) Sludge treatment
4) Tertiary treatment
11. DNA fragments are:
1) Negatively charged       
2) Neutral
3) Either positively or negatively charged depending on their size
4) Positively charged
12. Plants which produce characteristic pneumatophores and show vivipary belong to :
1) Halophytes
2) Psammophytes
3) Hydrophytes   
4) Mesophytes
13. Among the following characters, which one was not considered by Mendel in his experiments on pea ?
1) Trichomes.Glandular or non-glandular
2) Seed . Green or Yellow
3) Pod . Inflated or Constricted
4) Stem - Tall or Dwarf
14. Which of the following components provides sticky character to the bacterial cell ?
1) Nuclear membrane
2) Plasma membrane
3) Glycocalyx       
4) Cell wall
15. Fruit and leaf drop at early stages can be prevented by the application of:
1) Ethylene         2) Auxins
3) Gibberellic acid     4) Cytokinins
16. Zygotic meiosis is characteristic of;
1) Fucus         2) Funaria
3) Chlamydomonas
4) Marchantia
17. Alexander Von Humbolt described for the first time:
1) Laws of limiting factor
2) Species area relationships
3) Population Growth equation
4) Ecological Biodiversity
18. Presence of plants arranged into well defined vertical layers depending on their height can be seen best in:
1) Tropical Rain Forest
2) Grassland
3) Temperate Forest
4) Tropical Savannah
19. Which ecosystem has the maximum biomass ?
1) Grassland ecosystem
2) Pond ecosystem
3) Lake ecosystem
4) Forest ecosystem
20. Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:
1) Bee         2) Wind
3) Bat         4) Water
21. Life cycle of Ectocarpus and Fucus respectively are:
1) Diplontic, Haplodiplontic
2) Haplodiplontic, Diplontic
3) Haplodiplontic, Haplontic
4) Haplontic, Diplontic
22. A gene whose expression helps to iden -tify transformed cell is known as :
1) Vector         2) Plasmid
3) Structural gene
4) Selectable marker
23. A dioecious flowering plant prevents both :
1) Autogamy and geitonogamy
2) Geitonogamy and xenogamy
3) Cleistogamy and xenogamy
4) Autogamy and xenogamy
24. Which statement is wrong for Krebs' cycle ?
1) There is one point in the cycle where FAD+ is reduced to FADH2
2) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised
3) The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid
4) There are three points in the cycle where NAD+ is reduced to NADH+ H+
25. Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in:
1) C4 plants        2) C2 plants
3) C3 and C4 plants    4) C3 plants
26. During DNA replication, Okazaki fragments are used to elongate:
1) The lagging strand towards replication fork.
2) The leading strand away from replication fork.
3) The lagging strand away from the replication fork.
4) The leading strand towards replication fork.
27. Which of the following RNAs should be most abundant in animal cell ?
1) t-RNA         2) m-RNA
3) mi-RNA         4) r-RNA
28. What is the criterion for DN A fragments movement on agarose gel during gel electrophoresis ?
1) The smaller the fragment size, the farther it moves
2) Positively charged fragments move to farther end
3) Negatively charged fragments do not move
4) The larger the fragment size, the farther it moves
29. DNA replication in bacteria occurs:
1) Within nucleolus
2) Prior to fission
3) Just before transcription
4) During S phase
30. Which one from those given below is the period for Mendel's hybridiza -tion experiments ?
1) 1840 - 1850    2) 1857 - 1869
3) 1870 - 1877    4) 1856 - 1863
31. Viroids differ from viruses in having;
1) DNA molecules without protein coat
2) RNA molecules with protein coat
3) RNA molecules without protein coat
4) DNA molecules with protein coat
32. Which of the following is correctly matched for the product produced by them ?
1) Methanobacterium : Lactic acid
2) Penicillium notatum : Acetic acid
3) Sacchromyces cerevisiae : Ethanol
4) Acetobacter aceti : Antibiotics
33. Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ?
1) Pseudomonas
2) Mycoplasma
3) Nostoc         4) Bacillus
34. Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur ?
1) Chromosomes will be fragmented
2) Chromosomes will not segregate
3) Recombination of chromosome arms will occur
4) Chromosomes will not condense
Answer Key
 1.1    2.3    3.2    4.2    5.2
6.4    7.1    8.2    9.1    10.2
11.1    12.1    13.1    14.3    15.2
16.3    17.2    18.1    19.4    20.2
21.2    22.4    23.1    24.3    25.1
26.3    27.4    28.1    29.2    30.4
31.3    32.3    33.2    34.2

- Sabbidi Ramesh
Research scholar
Department of Botany
Osmania University-Hyd