Part – 3 (Questions 51 – 75) (MCQ 012)
(51). Buffers has the ability to
a. Change in pH
b. Resist change in pH
c. No resist to change in pH
d. All of the above
(52). Why is the filamentous body of the slime and water molds considered an example of convergent evolution with the hyphae of true fungi?
a. Fungi are closely related to the slime and water molds
b. Body shape reflects phylogenetic relationships among organisms
c. Filamentous shape is an adaptation for a nutritional mode as a decomposer with absorptive nutrition
d. Filamentous body shape is evolutionary primitive for all eukaryotes
(53). The amount of light absorbed by a material is proportional to the concentration of the absorbing solution is referred as:
a. Beer’s law
b. Boger-Lambert law
c. Poiseuille’s law
d. All of the above
(54). Lateral roots in higher plants arise from:
a. Cortex
b. Pericycle
c. Epidermis
d. Endodermis
(55). The emission of phosphorescent radiation is slow due to
a. Singlet ground state to triplet excited state transition is forbidden
b. Triplet excited state to singlet ground state transition is forbidden
c. Singlet excited state to triplet excited state transition is forbidden
d. Both (b) and (c)
(56). In Gram staining, safranin act as:
a. Primary stain
b. Mordant
c. Counter stain
d. Decoloriser
(57). Wheat was first domesticated in
a. China
b. Peru
c. Middle east
d. Mexico
(58). A culture containing only one kind of microorganism is called: (question removed)
a. Culture
b. Pure culture
c. Auxenic culture
d. All of the above
(59). A popular improved variety of rice is:
a. Pusa 240
b. Pusa Bold
c. Pusa Basmati
d. Pusa Ageti
(60). The Km value of an enzyme (Michaelis constant) for a substrate is defined as:
a. Half the substrate concentration of which the reaction rate is maximal
b. The substrate concentration of which the reaction rate is half maximal
c. The dissociation constant of the enzyme-product complex
d. The dissociation constant of the enzyme-substrate complex.
(61). RNA molecules that exhibit catalysis is activity are called:
a. mRNA
b. Ribonucleases
c. Ribozymes
d. Ribonucleotides
(62). The co-existence of multiple alleles at a locus is called:
a. Gene polymorphism
b. Nucleotide polymorphism
c. Overlapping genes
d. Gene duplication
(63). If you discovered a bacterial cell that had no restriction enzyme, which of the following would you expect to happen?
a. The cell would be unable to replicate its DNA
b. The cell would create incomplete plasmids
c. The cell would be easily infected and lysed by viruses
d. The cell would become a parasite
(64). The kind of filter used in laminar air flow is:
a. Membrane filter
b. Seitz filter
c. HEPA
d. All of the above
(65). Co-enzymes are __________ organic compounds.
a. Non-protein
b. Protein
c. Lipoprotein
d. All of the above
(66). NMR spectroscopy is:
a. Absorption
b. Emission
c. Radiation
d. Diffraction
(67). In electrophoresis, if pH is above isoelectric point a protein will:
a. From zwitter ions
b. Migrate to anode
c. Precipitate
d. Not move
(68). Leucine zipper motif is a mediator for
a. Membrane attack complex
b. Binding of regulatory proteins to DNA
c. Cyclic AMP
d. Ligand membranes
(69). The direct method of study of Bacteriophage is
a. Lysogenic conversion
b. Serological testing
c. Electron microscopy
d. Plaque study
(70). Cycas stem shows:
a. Porous wood
b. Manoxylic wood
c. Pycnoxylic wood
d. Ring porous wood
(71). Which is the most diverse molecule in the cell?
a. Carbohydrates
b. Protein
c. Lipids
d. Mineral salts
(72). What characteristics do all protists in common? They are all:
a. Multicellular
b. Photosynthetic
c. Nonparasitic
d. Eukaryotic
(73). A defining characteristic of allopatric speciation is:
a. The appearance of new species in the midst of existing ones
b. Asexually reproducing populations
c. Geographic isolation
d. Artificial selection
(74). Which of the following causes red tides?
a. Red algae (Rhodophyta)
b. Dinoflagellates
c. Diatoms
d. (a), (b) and (c) are correct
(75). The evolutionary innovations that first appeared among the gymnosperms (i.e., not seen in bryophytes and seedless vascular plants) include:
a. Heterospory
b. True roots
c. Retention of the female gametophyte on the maternal sporophyte
d. Presence of xylem elements
Original question paper of Kerala PSC Botany Lecturer/Assistant Professor (Category No. 464/2007) examination conducted by Kerala PSC (Public Service Commission) on 20/06/2009 (Q. Code 196/2009) for the appointment of Botany Lecturer/Assistant Professor in Government Colleges of Kerala under the Directorate of Collegiate Education, Trivandrum, Kerala. MCQ (Multiple Choice Questions format)
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Answers:
# Questions removed before the publication of final rank-list
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Kerala PSC Botany Lecturer Examination: Part-1 , Part-2 , Part-4
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