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1) An antibody is made of _________ polypeptide chains? a. 1 b. 2 c. 3 d. 4
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2) Production of genetically identical copies of organisms/cells by asexual reproduction is called__________? a. Mitosis b. Replication c. Cloning d. Biological control
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3) 95% of the cytoplasm of RBCs is____________? a. Hemoglobin b. Enzymes c. Salts d. Other proteins
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4) _________________ cells of phloem are directly involved in transport of organic solutes? a. Parenchyma b. Companion cell c. Tracheid d. Sieve element
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5) An infectious disorder of respiratory system is_________________? a. Cancer b. Asthma c. Tuberculosis d. Emphysema
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6) Cuticular transpiration is _____________ of total transpiration? a. 1-2% b. 3-4% c. 5-7% d. 90%
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7) According to cohesion-tension theory, tension is created by__________________? a. Hydrogen bonding b. Transpiration c. Adhesion d. Root prerssure
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8) Deoxygenated blood first enters in _________ part in fishes? a. Sinus venosus b. Right atrium c. Left atrium d. Conus arteriosus
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9) Ozone depletion occurs commonly due to_______________? a. Carbon dioxide b. Chlorofluorocarbons c. UV rays d. Deforestation
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10) Who coined the term CELL? a. Schwann b. Schleiden c. Robert Hook d. Both a and b
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11) “lubb” sound is produced due to___________________? a. Opening of inlet valve b. Closure of inlet valve c. Opening of outlet valve d. Closure of outlet valve
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12) In condition of high temperature, following does not occur or occurs at low level__________? a. Vasodilation b. Activation of sweat glands c. Thermogenesis d. Evaporative cooling
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13) Who first observed and thus hypothesized that new cells are formed from previously existing living cell? a. Theodor Schwann and Schleiden b. Rudolph Virchows c. Louis Pasteur d. Both b and c
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14) In Hardy-Weinberg formula P2 represents frequency of_____________? a. Recessive allele b. Dominant allele c. Homozygous dominant individual d. Homozygous recessive individual
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15) _____________ supported theory of special creation? a. Linnaeus b. Aristotle c. Mendel d. Lamarck
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16) Percentage of proteins in cell membrane is____________? a. 20-40% b. 40-50% c. 60-80% d. 80-100%
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17) Which of the following is most constant abiotic component of ecosystem___________? a. Air b. Water c. Land d. Gravity
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18) Ecosystem not found in Pakistan is_____________? a. Tropical rain forest b. Temperate deciduous forest c. Grassland d. Tundra
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19) Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called__________? a. Active transport b. Passive transport c. Co-transport d. Counter transport
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20) The productivity of aquatic ecosystem is basically determined by light and____________? a. CO2 b. O2 c. Water d. Nutrients
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21) The first layer of cell wall which is formed is___________? a. Primary wall b. Secondary wall c. Middle lamella d. All of these
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22) Annual rainfall in grassland is about_____________? a. More than 2500 mm b. 750-1500 mm c. 250-750 mm d. Less than 250 mm
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23) Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due_____________? a. Rhizobium b. Nitrosomonas c. Nitrobacter d. Pseudomonas
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24) Cellulose is the major component of__________? a. Primary wall b. Secondary wall c. Middle lamella d. all of the above
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25) Humming bird is an example of________________? a. Cold blooded animal b. Ectotherm c. Endotherm d. Heterotherm
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26) Number of cervical vertebrae is_____________? a. 5 b. 7 c. 9 d. 12
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27) Autophagosomes are____________? a. Those lysosomes which eat parts of their own cells to generate energy b. Those lysosomes which eat old and worn out cellular organelles c. Lysosomes which help in extracellular digestion d. Both a and b
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28) Sapwood is formed from_____________? a. Primary xylem b. Secondary xylem c. Primary phloem d. Secondary phloem
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29) Which of the following cytoskeletal fiber contain tubulin protein? a. One which help in assembly of spindles during mitosis. b. One involved in internal cell motion. c. One involved in maintenance of cell shape. d. Both b and c
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30) Only myosine is present in_____________? a. A band b. 1 band c. H zone d. Sarcomere
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31) Joints present in skull are example of_______________? a. Fibrous joints b. Cartilaginous joints c. Synovial Joints d. Slightly moveable joints
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32) The human naked eye can differentiate between two points which are __________ apart? a. 1.0 mm b. 0.1 mm c. 1.0 cm d. 1.0 dm
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33) _____________ is a nervous disorder characterized by involuntary tremors, diminished motor power and rigidity? a. Epilepsy b. Meningitis c. Alzheimer’s disease d. Parkinson’s disease
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34) Of the following which one is not the characteristic of mitochondria? a. It contains F1 particles b. It is involved in the synthesis of protein c. It is a self replicating organelle d. Number of mitochondria is constant
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35) In human female, fertilization commonly occurs at______________? a. Proximal part of oviduct b. Distal part of oviduct c. Uterus d. Cervix
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36) The part of chloroplast where CO2 is fixed to manufacture sugar is__________? a. Stroma b. Grana c. Thylakoid d. Outer membrane
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37) Highest form of learning is__________________? a. Latent learning b. Insight learning c. Operant conditioning d. Instinct
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38) Which of the following hormone is polypeptide in nature____________? a. Insulin b. Thyroxine c. ADH d. Cortisone
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39) Ribosomes are assembled in__________? a. Nucleolus b. Nucleus c. DNA d. RNA
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40) Far-red light promotes flowering in_______________? a. Short day plant b. Long day plant c. Day neutral plant d. None of these
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41) Which of the following is not present in mitochondria? a. Enzymes b. Co-enzymes c. Ribosomes d. Thylakoids
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42) Secretin inhibits production of__________________? a. Gastric juice b. Pancreatic juice c. Bile d. All of these
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43) Yellowish glandular structure which produces progesterone is_____________? a. Graffian follicle b. Ovary c. Corpus luteum d. Placenta
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44) The stent energy in the form of ADP is regenerated by mitochondria into__________? a. AMP b. ADP c. ATP d. All of these
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45) XO-XX pattern of sex determination is present in______________? a. Grasshopper b. Butterfly c. Drosophila d. Man
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46) On which of the following component of chloroplast chlorophyll is arranged? a. Cell membrane b. Matrix c. Thylakoids d. Stroma
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47) An example of codominance is______________? a. A’ blood group b. B’ blood group c. O’ blood group d. AB’ blood group
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48) Test cross is used to find_____________? a. Trait b. Phenotype c. Genotype d. Ratios
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49) Number of nuclear pores/nucleus in an RBC are_________? a. 1?3 b. 3?4 c. 10000 d. 30000
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50) Yellow cytoplasm in ascidian gives rise to______________? a. Epidermis b. Muscle cells c. Gut d. Notochord
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