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Question. The correct sequence of hormone secretion from beginning of menstruation isA. FSH, progesterone, estrogen.B. estrogen, FSH, progesterone.C. FSH, estrogen, progesterone.D. estrogen, progesterone, FSH. Answer: C. FSH, estrogen, progesterone.

Question. Penetration of the sperm in the ovum is followed byA. formation of first polar body.B. completion of meiosis II.C. first meiosis.D. dissolution of zona pellucida. Answer: B. completion of meiosis II

Question. Which of the following statements are correct with respect to hormones secreted by placenta?(i) Placenta secretes relaxin during later stage of pregnancy.(ii) Placenta secretes high amount of FSH during pregnancy.(iii) Placenta secretes relaxin during initial stage of pregnancy.(iv) Placenta secretes hCG and hPL during pregnancy.A. (i) and (iv)B. (i), (ii) and (iv)C. (iii) and

Question. Pollen grains are well preserved as fossils because of presence ofA. sporopolleninB. celluloseC. lignocelluloseD. pectocellulose Answer: A. sporopollenin

Question. The coconut water from tender coconut isA. cellular endosperm.B. free nuclear endosperm.C. both cellular and nuclear endosperm.D. free nuclear embryo. Answer: B. free nuclear endosperm.

Question. The structure of bilobed anther consists ofA. 2 thecae, 2 sporangiaB. 4 thecae, 4 sporangiaC. 4 thecae, 2 sporangiaD. 2 thecae, 4 sporangia Answer: D. 2 thecae, 4 sporangia

Question. Alkenes decolourise bromine water in presence of CCl4 due to formation of:(a)allyl bromide(b)vinyl bromide(c)bromoform(d)vicinal dibromide Answer: (d)vicinal dibromide CH2=CH2 + Br2 → BrCH2 – CH2Br

Question. Identify the secondary alcohols from the following set:(i)CH3CH2CH(OH)CH3(ii) (C2H5)3COH (a)(i) and (iv)(b)(i) and (iii)(c)(i) and (ii)(d)(i), (iii) and (iv) Answer: (a)(i) and (iv)

Question. Which of the following statements is true: (a)Ammonia is the weakest reducing agent and the strongest base among Group 15 hydrides. (b) Ammonia is the strongest reducing agent as well as the strongest base among Group 15 hydrides. (c)Ammonia is the weakest reducing agent as well as the weakest base among Group 15 hydrides.

Question. o-hydroxy benzyl alcohol when reacted with PCl3 gives the product as (IUPAC Name)(a) o- hydroxy benzyl chloride(b) 2- chloromethylphenol(c) o-chloromethylchlorobenzene(d) 4-hydroxymethylphenol Answer: (b) 2- chloromethylphenol