Question Paper (Section wise)
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1) For CE transistor amplifier. The audio signal voltage across the collector resistance of 2kΩ is 4 v. if the current amplification factor of the transistor is 100 and the base resistance is 1 kΩ, then the input signal voltage is
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15 mV
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10 mV
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20 mV
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30 mV
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2) A particle moves from a point
 to 
when a force of 
 N is applied. How much work has been done by the force?-
2 J
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8 J
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11 j
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5 J
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3) A body cools from a temperature 3T to 2T in 10 minutes. The room temperature is T. Assume that Newton’s law of cooling is applicable. The temperature of the body at the end of next 10 minutes will be
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4) The potential difference (VA - VB) between the points A and B, where I = 2A in the given figure is
Â
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+ 9 V
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- 3 V
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+ 3 V
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+ 6 V
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5) Two identical glass (µg = 3/2) equiconvex lenses of focal length f each are kept in contact. The space between the two lenses is filled with water (µw = 4/3). The focal length of the combination is
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3f/4
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f/3
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f
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4f/3
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1) In the reaction
Â
The electrophile involved is
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dichloromethyl anion
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formyl cation (CHO)
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dichloromethyl cationÂ
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dichlorocarbene (:CCl2)
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2) The correct order of N – compounds in its decreasing order of oxidation states is:
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HNO3, NH4CI, NO, N2
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HNO3, NO, NH4CI, N2
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HNO3, NO, N2, NH4Cl
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NH4CI, N2, NO, HNO3
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3) Match the metal ions given in column I with the spin magnetic moments of the ions given in Column II and assign the correct code:
Â
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4) Which of the following molecules represents the order of hybridization sp2, sp2, sp, sp from left to right atoms?
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CH2 = CH – CH = CH2
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CH2 = CH - C ≡ CH
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HC ≡ C – C ≡ CH
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CH3 – CH ≡ CH - CH3
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5) Regarding cross-linked or network polymers, which of the following statements is incorrect?
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examples are bakelite and melamine.
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They are formed from bi- and tri- functional monomers.
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They contain covalent bonds between various liner polymer chains.
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They contain strong covalent bonds in their polymer chain.
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1) Capacitation occurs in:
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Epididymis
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Vas deferens
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Female reproductive tract
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Rete testis
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2) Which of the following are found in extreme saline conditions?
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Eubacteria
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Cyanobacteria
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Mycobacteria
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Archaebacteria
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3) The process of separation and purification of expressed protein before marketing is called
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Downstream processing
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Bioprocessing
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Postproduction processing
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Upstream processing
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4) A temporary endocrine gland in the human body is:
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Corpus cardiacum
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Corpus luteum
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Corpus allatum
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Pineal gland
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5) Select the correct route for the passage of sperms in male frogs:
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Testes → Vasa efferentia → Kidney → Seminal Vesicle → Urinogenital duct → Cloaca
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Testes → Vasa efferentia → Bidder's canal → Ureter → Cloaca
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Testes → Vasa efferentia → Kidney → Bidder's canal → Urinogenital duct → Cloaca
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Testes → Bidder's canal → Kidney → Vasa efferentia → Urinogenital duct → Cloaca
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6) In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilization?
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Gamete intracytoplasmic fallopian transfer
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Artificial insemination
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Intracytoplasmic sperm injection
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Intrauterine transfer
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7) GnRH, a hypothalamic hormone, needed in reproduction, acts on:
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Anterior pituitary gland and stimulates secretion of LH and FSH.
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Posterior pituitary gland and stimulates secretion of oxytocin and FSH.
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Posterior pituitary gland and stimulates secretion of LH and relaxin.
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Anterior pituitary gland and stimulates secretion of LH and oxytocin.
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8) What is the criterion for DNA fragments movement on an agarose gel during gel electrophoresis?
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The smaller the fragment size, the farther it moves.
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Positively charged fragments move to farther end.
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Negatively charged fragments do not move.
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The larger the fragment size, the farther it moves.
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9) Which one of the following statements is not valid for aerosols?
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They alter rainfall and monsoon patterns.
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They cause increased agricultural productivity.
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They have a negative impact on agriculture.
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They are harmful to human health.
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10) A baby boy aged two year is admitted to play school and passes through a dental check - up. The dentist observed that the boy had twenty teeth. Which teeth were absent?
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Canines
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Pre-molars
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Molars
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Incisors
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