Botany CSS Paper II 2011

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR
RECRUITMENT TO POSTS IN BS-17
UNDER THE FEDERAL GOVERNMENT, 2011
BOTANY, PAPER II
TIME ALLOWED: THREE HOURS
(PART-I MCQs) 30 MINUTES MAXIMUM MARKS: 20
(PART-II) 2 HOURS & 30 MINUTES MAXIMUM MARKS: 80
NOTE: (i) First attempt PART-I (MCQs) on separate Answer Sheet which shall be taken back after 30 minutes.
(ii) Overwriting/cutting of the options/answers will not be given credit.
(PART-I MCQs) (COMPULSORY)
Q.1. Select the best option/answer and fill in the appropriate box on the Answer Sheet. (1 x 20=20)
(i) Reduction takes place in —— stage of meiosis.
(a) Metaphase I (b) Anaphase I (c) Telophase I (d) None of these
(ii) Group of young cells which are capable of active cell division is called:
(a) Meristem (b) Parenchyma (c) Periderm (d) None of these
(iii) Genetic basis of ABO blood group system was explained by;
(a) Landsteiner (b) Levine (c) Bernstein (d) None of these
(iv) Allele for whiteness in Drosophila is:
(a) Recessive (b) Dominant (c) Codominant (d) None of these
(v) Major unit of Ecology is:
(a) Ecosystem (b) Biosphere (c) Community (d) None of these
(vi) Primary succession that starts on dry soil/rock is called:
(a) Derosere (a) Xerosere (a) Lithosere (a) None of these
(vii) The way Glucose is metabolized/oxidized depends on the availability of:
(a) CO2 (b) O2 (c) Energy (d) None of these
(viii) The absorbing peak of Chlorophyll is:
(a) 680 (b) 670 (c) All of these (d) None of these
(ix) Light can work in photosynthesis only when it is:
(a) Absorbed (b) Transmitted (c) Reflected (d) None of these
(x) Cellular respiration consists of:
(a) Glycolysis (b) Krebs cycle and respiratory chain (c) All of these (d) None of these
(xi) The chemical wastes from Industry are called as:
(a) Effluents (b) Garbage (c) Sewage (d) None of these
(xii) All chromosomes other than sex chromosomes are called as:
(a) Autosomes (b) Dictyosomes (c) Autophagosomes (d) None of these
(xiii) Actual place/location where organism lives is called as:
(a) Habitat (b) Domain (c) Niche (d) None of these
(xiv) In roots and stems having secondary growth, the epidermis is replaced by a protective layer called:
(a) Phellogen (b) Periderm (c) Cuticle (d) None of these
(xv) The stomata with 2 large and one small subsidiary cells surrounding stoma is called as:
(a) Diacytic (b) Anisocytic (c) Cyclocytic (d) None of these
(xvi) Vacuoles are filled with watery fluid called as:
(a) Cell sap (a) Enzymes (a) Plastids (a) None of these
(xvii) The chromosomes arrange themselves on the equator of spindle fibres during:
(a) Metaphase (b) Anaphase (c) Telophase (d) None of these
(xviii) The event that gives rise to the heritable alteration in the genotype is termed as:
(a) Translocation (b) Abnormality (c) Mutation (d) None of these
(xix) The sequence of genes along the DNA strand is called as:
(a) Genetic code (b) Chromosomal aberration (c) DNA sequence (d) None of these
(xx) Chemicals used to destroy animal pests are:
(a) Herbicides (b) Pesticides (c) Insecticides (d) None of these
PART-II
NOTE:(i) PART-II is to be attempted on separate Answer Book.
(ii) Attempt ONLY FOUR questions from PART-II. All questions carry EQUAL marks.
(iii) Extra attempt of any question or any part of the attempted question will not be considered.
Q.2. What is dormancy? Enlist different methods to break dormancy? (20)
Q.3. Write down short notes on: (7+7+6=20)
(a) Food chain (b) Vernalization (c) Adaptive mutations
Q.4. Give the Biosynthesis and mode of action of Abscisic acid. (20)
Q.5. Define linkage. Explain the phenomenon of coupling and repulsion with reference to linkage. Give example. (20)
Q.6. What do you mean by evolution? How would you explain Lamarckism? (20)
Q.7. Define Mitosis and enlist its different stages? (20)
Q.8. Write short notes on ANY TWO of the following: (10+10)
(a) What is water logging? Give its causes and reclamation?
(b) What is transpiration and also give its various types.
(c) Elaborate the mechanism of stomatal movement?