2003
Paper I
7. (A) Write only the correct answer in the Answer Book. Do not reproduce the questions.
(1) Contractile vacuole in Protozoa is basically concerned with:
(a) Excretion
(b) Osmoregulation
(c) Respiration
(d) None of these
(b) Osmoregulation
(2) Gammules are produced in:
(a) Annelida
(b) Arthropoda
(c) Porifera
(d) None of these
(c) Porifera
(3) Scales in Reptiles originate from:
(a) Ectoderm
(b) Mesoderm
(c) Endoderm
(d) None of these
(a) Ectoderm
(4) The Chordates are dissected from:
(a) Dorsal side
(b) Ventral side
(c) Lateral side
(d) Both (a) and (b)
(e) None of these
(b) Ventral side
(5) Open type of blood vascular system is present in:
(a) Echinoderms
(b) Chordates
(c) Molluses
(d) None of these
(c) Molluses
(6) Frog has the following number of Neck Vertebrae:
(a) Seven
(b) Nine
(c) Four
(d) Zero
(e) None of these
(b) Nine
(7) Insects have not adapted to the environment:
(a) Aquatic
(b) Fresh water
(c) Marine
(d) None of these
(a) Aquatic
(8) The true jaw is not present in:
(a) Elasmobranchs
(b) Boney Fish
(c) Agnatha
(d) None of these
(c) Agnatha
(9) Sea Horse is included in:
(a) Pisces
(b) Mammals
(c) Insects
(d) Mollusca
(e) None of these
(a) Pisces
(10) A house fly has the following number of legs:
(a) Four
(b) Eight
(c) Six
(d) None of these
(a) Four
(B) Check which of the following statements are true or false. On your answer sheets just write the question number and T or F.
(11) Some sponges are found in freshwater also. T
(12) Choanocysts are found in Coelentrates. F
(13) Coral reefs are present in the sandy coasts of Karachi. T
(14) All the internal body cavities are not Coelome. T
(15) Mouth parts in Arthropodes are modified appendages. T
(16) The appearances of different stages in the embryonic development of a mammal is called as Metamorphosis. T
(17) The major part of the Chordate body is Mesodermal in origin. T
(18) The Echinoderms and Chordates are Enterocoelic. T
(19) Girraffe and goat are similar in having seven neck vertebrae. T
(20) The mammals are characterized by having Mammary glands. T
8. Write only the correct answer in the Answer Book. Do not reproduce the questions.
(1) The main division of the chromosomes occurs in:
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Jelophase
(e) None of these
(c) Anaphase
(2) The protein synthesis occurs in:
(a) Mitochondria
(b) Endoplasmic reticulum
(c) Ribosomes
(d) Acrosome
(e) None of these
(c)
Ribosomes
(3) Blood antigens are present in:
(a) Blood serum
(b) RBC’s
(c) WBC’s
(d) Platelets
(e) None of these
(b) RBC’s
(4) Sex linked genes are the genes located on:
(a) X-chromosome only
(b) Y-chromosome only
(c) Both X and Y-chromosomes
(d) X or Y-chromosomes
(e) None of these
(a) X-chromosome only
(5) Transcription is the phenomenon associated with:
(a) Synthesis of new DNA
(b) Formation of mRNA and DNA
(c) Formation of tRNA
(d) None of these
(d) None of these
(6) Segregation of alleles of a gene occurs in:
(a) Diploid individual
(b) Homozygous individual
(c) Heterozygous individual
(d) All of the above
(e) None of these
(a) Diploid individual
(7) Sodium-Potassium pump is located in:
(a) Liver
(b) Heart Cell
(c) Nerve cell
(d) All of the above
(e) None of these
(d) All of the above
(8) Pepsin is an enzyme responsible for breaking:
(a) Proteins
(b) Lipids
(c) Fats
(d) None of these
(a) Proteins
(9) Pace maker is located in:
(a) Liver
(b) Brain
(c) Heart
(d) Muscle
(e) None of these
(c) Heart
(10) Follicle stimulating hormones are produced in:
(a) Pituitary
(b) Ovaries
(c) Thyroid
(d) Kidney
(e) None of these
(a) Pituitary
(11) Genetic dominance is strongly associated with:
(a) Personality dominance
(b) Adaptive value
(c) Population distribution
(d) None of these
(c) Population distribution
(12) Crossing over is the physical exchange between chromosomes.
(a) Homologous
(b) Non-Homologous
(c) Both (a) and (b)
(d) None of these
(a) Homologous
(13) XXY individual in man is phenotypically a:
(a) Male
(b) Female
(c) Inter sex
(d) None of these
(a) Male
(14) Amino acids are the organic compound behaving like:
(a) Acid
(b) Base
(c) Both (a) and (b)
(d) None of these
(c) Both (a) and (b)
(15) Which of these can be the first living organism on the earth:
(a) Protozoan
(b) Algae
(c) Virus
(d) None of these
(d) None of these
(16) Ontogeny represents the history of an organism.
(a) Revolutionary
(b) Embryonic
(c) Both (a) and (b)
(d) None of these
(b) Embryonic
(17) Nuclear membrane has a structure similar to:
(a) Cell membrane
(b) Mitochondrion
(c) Endoplasmic reticulum
(d) All of these
(d) All of these
(18) Osmosis is the movement of solutes through a membrane.
(a) Permeable
(b) Semi-permeable
(c) Both (a) and (b)
(d) None of these
(b) Semi-permeable
(19) Sickle Cell Anemia is the condition where the RBC’s deflate.
(a) Under Oxygen
(b) Absence of Oxygen
(c) Both (a) and (b)
(d) None of these
(b) Absence of Oxygen
(20) Pond is an example of ecosystem:
(a) Complete
(b) Incomplete
(c) Almost complete
(d) None of these
(a) Complete