6 Progesterone is called pregnancy hormone as it helps in: a) Release of the ovum from the ovary. b) Maintaining pregnancy and bring about labour pain. c) Help in causing contraction of the uterus for delivery. d) Lactation. [1] 7 Mitotic division in zygote as it moves through the isthmus of the oviduct is called: a) Multiple fission b) Binary fission c) Trophoblast d) Cleavage [1] 8 Which one is not correct about the function of the placenta? a) Help in respiration b) Help in nutrition c) Release HCG hormone d) Release testosterone hormone [1] 9 High increase in the human population is due to: a) Increase in the death rate b) Genetic change c) Better medical facilities d) The decrease in the birth rate [1] 10 The natural method of birth control in which the couples avoid coitus from day 10 to 17 of the menstrual cycle is called: a) Periodic abstinence b) Lactational amenorrhea c) Copulation abstinence d) Withdrawal [1] 11 Now a day, there is less childless couples. This is due to: a) Educated population b) Uneducated population c) Awareness among the couples d) Assisted reproductive technologies [1] 12 Mendel’s “factors” that remain stable over generation to generation is now called as: a) Chromosomes b) DNA c) Traits d) Genes [1] 13 Possibility of becoming hemophilic is extremely rare because the mother of such female to be at least: a) Carrier and father should be hemophilic b) None of the parent should be hemophilic c) Hemophilic and father should be a carrier d) Both should be hemophilic [1] 14 In XO type of sex determination: 1. Some sperms bear X - chromosome whereas some do not. 2. The numbers of male and female chromosomes are equal. 3. An egg fertilized by sperms having an X - chromosome becomes female. a) Only (b)is correct b) Only (a)is correct c) Both (a)and (c)are correct d) Both (b)and (c)are correct [1] 15 Discontinuous synthesis of DNA occurs in one strand, because: a) DNA molecule being synthesised is very long. b) DNA ligase joins the short stretches of DNA. c) It is a more efficient process. d) DNA dependent DNA polymerase catalysis polymerisation only in one direction (5’→ 3’). [1] 16 Production of a human protein in bacteria by genetic engineering is possible because: a) The human chromosome can replicate in the bacterial cell. b) Bacterial cells can carry out the RNA splicing reactions. c) The genetic code is universal. d) The mechanism of gene regulation is identical in humans and bacteria.