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PPSC Biology Lecturer Solved Past Papers
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Lecturer Zoology Past Paper 2018
Q NO 1.At cytokinesis, in plants, a structure phragmoplast is formed from vesicles which originate from?
A: Lysosomes
B: Centriole
C: Golgi complex
D: Glyoxysome
Q NO 2.An alpha helix is an example of ……. structure of protein?
A: Primary
B: Secondary
C: Tertiary
B: Quaternary
Q NO 3.Central molecular diagram of Biology is?
A: DNA → DNA → protein
B: DNA → RNA → protein
C: RNA → DNA → protein
D: RNA→ protein → RNA
Q NO 4.An enzyme …… the activation of energy of the reaction?
A: Lowers
B: Raises
C: Dose not affect
D: None of these
Q NO 5.Which cell type you will prefer to take the nucleus of cloning?
A: B-cell
B: RBC
C: Embryonic cell
D: Sperm
Q NO 6.Where you do transfer nucleus for cloning?
A: Enucleated cell
B: Enucleated egg
C: Egg
D: Sperm
Q NO 7.With respect to outside, the inside of neutron is at rest is ……?
A: More negatively charged
B: More positively charged
C: Same charge
D: Zero electrical potential
Q NO 8.What is the normal resting potential of a neuron?
A: -70 mv
B: +70 mv
C: 0 mv
D: -90 mv
Q NO 9.What are characters of stem cells?
A: Self-renewing
B: Can differentiate each other
C: Both A & B
D: None of these
Q NO 10.Prions are made up of ……?
A: Viruses
B: DNA
C: RNA
D: Protein
Q NO 11.Larva of a sponge is known as?
A: Planula Larva
B: Trochophore Larva
C: Glochidium Larva
D: Amphiblasula Larva
Q NO 12.Sycone belongs to ……. class?
A: Calcarea
B: Porifera
C: Desmosspongia
D: Hexactinellida
Q NO 13.The class corals is?
A: Anthozoa
B: Scyphozoa
C: Hydrozoa
D: None of these
Q NO 14.A renal portal system is found in?
A: Man
B: Horse
C: Rabbit
D: Frog
Q NO 15.These are free-living Platyhelminthes?
A: Cestoda
B: Trematoda
C: Turbellaria
D: Nematoda
Q NO 16.Turner’s syndrome is represented by ……?
A: XYY
B: XO
C: XXY
D: XXX
Q NO 17.Synthesis of RNA and proteins take place in ……?
A: S Phase
B: M Phase
C: G1 phase
D: G2 Phase
Q NO 18.Why are there more males with color blindness than females?
A: The gene is found on the Y chromosome
B: The recessive gene is marked by another X chromosome in females
C: All the sons of the affected man will have color blindness
D: None of these
Q NO 19.During meiosis, the chromosomes become daughter chromosomes during?
A: Prophase 1
B: Metaphase II
C: Anaphase II
D: None of these
Q NO 20.The genetic disorder scale cells anemia is an example of?
A: Pleiotropy
B: Homozygous dominance
C: Epistasis
D: None of these
Q NO 21.Which of the following is correct for Aneuploidy?
A: 3n+1
B: 4n+1
C: 2n+1
D: None of these
Q NO 22.The X rays diffraction studies by …… played key role to the discovery of DNA structure?
A: Watson & Crick
B: Franklin
C: Chargaff
D: None of these
Q NO 23.The triplet code of CAT in DNA is represented as ……. in mRNA and ……. in tRNA?
A: GAA, CAT
B: CAT, CAT
C: GUA, CAU
D: GTA, CAU
Q NO 24.In Turner’s syndrome?
A: Premature cataract is common
B: The cells contains 45 chromosomes
C: The offspring’s have 50% of inheriting the disease
D: The patient is below the average height
Q NO 25.The following is a steroid hormone?
A: Testosterone
B: Cortisol
C: Aldosterone
D: Growth hormone
Q NO 26.Insulin is a human ……?
A: Gene
B: Protein
C: Glucose
D: None of these
Q NO 27.Fibrinogen is found in …….?
A: Bile and produced in liver
B: Blood and produces by RBCS
C: Blood and produced in liver
D: None of these
Q NO 28.Petromyzon belongs to which class?
A: Angatha
B: Gnathostomata
C: Protochordata
D: None of these
Q NO 29.Lateral line system is present in?
A: Fish
B: Frog
C: Reptiles
D: None of these
Q NO 30.Classification of Arthropoda is based on the number and structure of?
A: Eyes and winds
B: Body segments and appendages
C: Muscles and ligaments
D: Gills and heart
Q NO 31.The True nervous system was first developed in?
A: Annelida
B: cnidarians
C: Flat worm
D: Sponge
Q NO 32.The Uniqueness of adult Echinoderms is due to …….?
A: Penta-radial symmetry , Hydrocoele
B: Bilateral symmetry , Hydrocoele
C: Bilateral symmetry, enterocoele
D: Penta-radial symmetry , enterocoele
Q NO 33.The larva form of liver fluke has cilia?
A: Reia
B: sporocyst
C: Meracidium
D: Metacercaria
Q NO 34.Which of the following is evidence that molluscs and annelids may have a common ancestor?
A: They have setae
B: They have a trochophore larva
C: Neither group has lungs
D: They include both marine and terrestrial animals
Q NO 35.The arboreal adaptations are those that help the animal to line in or on?
A: Burrows
B: Air
C: Rocks
D: Trees
Q NO 36.Ctenoid scales are present on the bodies of?
A: Chondrichthyes
B: Osteichthyes
C: Cyclostomes
D: Myxini
Q NO 37.Birds that fly at high altitudes need an especially efficient respiratory system because?
A: At high altitude the air sacs do not function
B: There is little oxygen in the atmosphere at high altitudes
C: At high altitudes birds flap their wings faster
D: There is little carbon dioxide at high altitudes
Q NO 38.When cell wall is removed from plant cell then it is called?
A: Protoplasts
B: Protoblasts
C: Mytoplast
D: Prothallus
Q NO 39.The virus used during cell fusion technique is?
A: Rous sarcoma
B: Influenza
C: Retrovirus
D: Sandal
Q NO 40.Nucleolar organizer is separated from rest of chromosome?
A: Primary constriction
B: Chromomere
C: Secondary constriction
D: Centromere
Q NO 41.This chemical inhibits protein synthesis in Prokaryotes?
A: Amanitin
B: Cyclohexamide
C: Penicilline
D: Chloramphenicol
Q NO 42.Linker region have …… base pairs when nucleosomes repeat after every 200 bp?
A: 34
B: 44
C: 54
D: 64
Q NO 43.Nucleic acids absorb ultraviolet light at?
A: 320 nm
B: 260 nm
C: 480 nm
D: 660 nm
Q NO 44.RNA polymerase III transcribe the gene/s of?
A: mRNA
B: rRNA
C: tRNA
D: All of these
Q NO 45.Reinnitiation of DNA duplication within the same cycle is prevented in?
A: Eukaryotes
B: Prokaryotes
C: Viroids
D: Viruses
Q NO 46.hymine dimmers damage in DNA is produced by ……..radiations?
A: Gamma
B: Infra-red
C: Ultraviolet
D: All of these
Q NO 47.Which of the following is responsible to cause Klinefelter’s syndrome?
A: XO
B: XXY
C: XX
D: XYY
Q NO 48.Which of the following is initiation codon?
A: UGU
B: UAG
C: AUAA
D: AUG
Q NO 49.This factor is necessary for transcriptional initiation in prokaryotes?
A: Alpha
B: Beta
C: Gamma
D: All of these
Q NO 50.Methyl group is attached to carbon number 5 of?
A: Thymine
B: Cytosine
D: Guanine
D: Uracil
Q NO 51.The retention of the larval forms and structures in adults is known as?
A: Metamorphosis
B: Retrogressive growth
C: Paedomorphosis
D: Puberty
Q NO 52.In the embryonic life, the RBC’s are formed in the spleen and?
A: Thymus
B: Kidney
C: Liver
D: Stomach
Q NO 53.This germinal layer in animal embryo gives rise to lungs?
A: Endoderm
B: Ectoderm
C: Mesoderm
D: Protostome
Q NO 54.The process by which the outside cell layer moves towards the deeper layer of the embryonic cell termed as?
A: Epiboly
B: Emboly
C: Regression
D: Inversion
Q NO 55.In oocyte development lamp brush chromosome serves as the hub of …… activity?
A: Replicational
B: Transcriptional
C: Transitional
D: Polyteny
Q NO 56.The development of a whole individual is technically termed as?
A: Allometry
B: Morphometry
C: Ontogeny
D: Orthometry
Q NO 57.What is the name of a functional kidney in fishes?
A: Pronephros
B: Mesonephros
C: Metanephros
D: Opisthonephros
Q NO 58.The hormone responsible for the Amphibian metamorphosis is?
A: Growth hormone
B: Calcitonin
C: Thyroxine
D: FSH
Q NO 59.Plasmolysis is the shrinkage of protoplast due to ……. of water?
A: Endosmosis
B: Diffusion
C: Active transport
D: Ex-osmosis
Q NO 60.Uric acid is the chief nitrogenous waste of?
A: Fish and Amphibian
B: Amphibian and Reptiles
C: Reptiles and Birds
D: Birds and Mammals
Q NO 61.The breakdown of alveoli occurs in?
A: Emphysema
B: Asthma
C: Tuberculosis
D: Pollen allergy
Q NO 62.The heart of class Pisces is?
A: Single circuit
B: Double circuit
C: Triple circuit
D: Open circuit
Q NO 63.The conversion of fibrinogen to fibrin is catalyzed by the enzyme?
A: Fibrin stabilizing factor
B: Thrombinase
C: Prothrombinase
D: Hydroxylase
Q NO 64.The sarcoplasmic reticulum in the muscle cells acts as a store of ……. ions?
A: Potassium
B: Sodium
C: Calcium
D: Magnesium
Q NO 65.This protein has anti-viral activity?
A: Interferon
B: C-reactive
C: Insulin
D: Growth factor
Q NO 66.Ring form ribose sugar is known as?
A: Ribopyranose
B: Ribofuranose
C: Furoribanose
D: None of these
Q NO 67.The positive charge on Histones is due to an abundance of the following amino acids?
A: Valine or Histidine
B: Arginine or Lysine
C: Proline or Methionine
D: Alanine or Valine
Q NO 68.ptyalin is an amylase which digests starch and glycogen to?
A: Sucrose
B: Lactose
C: Maltose
D: Galactose
Q NO 69.Metal ions used by many enzymes to change their non-functional active sites to functional ones are called?
A: Co-enzymes
B: Apo-enzymes
C: HoloenzYmes
D: Co-factor
Q NO 70.The breakdown of a glucose molecule in two molecules of pyruvate results in the production of ……. ATP molecules?
A: 2
B: 4
C: 36
D: 38
Q NO 71.In glucose molecule, the number of asymmetric carbon atoms is?
A: One
B: Two
C: Three
D: Four
Q NO 72.Which of the following is NOT an amino acid?
A: Glutamic acid
B: Aspartic acid
C: Glutarnine
D: Palmitic acid
Q NO 73.What will be the frequency of T in a population if tasters are 64%?
A: 0.24
B: 0.4
C: 0.6
D: 0.8
Q NO 74.The process in which bacteria take up the DNA released from lysed cells nearby or surrounding medium is?
A: Generalized Transduction
B: Conjugation
C: Specialized transduction
D: Transformation
Q NO 75.Blood group system ABO was discovered by?
A: Bernstein
B: Landsteiner
C: Correns
D: T.H. Morgan
Q NO 76.Which is the correct order, from smallest to largest of base pairs?
A: Plasmid, transposon, chromosomal DNA
B: chromosomal DNA, transposon, plasmid
C: Transposon, plasmid, chromosomal DNA
D: Plasmid, chromosomal DNA, transposon
Q NO 77.Phenotype ratio of monohybrid crosses with incomplete dominance?
A: 3:1
B: 1:2:1
C: 2:2
D: 9:3:3:1
Q NO 78.Assuming Hardy-Weinberg equilibrium, what will be the genotype frequency of heterozygote, where frequency alleles being studied are 0.7 and 0.3?
A: 0.42
B: 0.5
C: 0.48
D: 0.21
Q NO 79.The most abundant and best-known greenhouse gas is?
A: Methane
B: CO2
C: CFCs
D: Nitrogen
Q NO 80.Mangrove forests are common in?
A: Bahawalpur
B: Karachi
C: Murree Hills
D: Quetta
Q NO 81.The environment where evaporation exceeds precipitation is called?
A: Desert
B: Tropical
C: Temperate
D: Coniferous
Q NO 82.This step ios absent in the Calvin cycle?
A: Carbon fixation
B: Oxidation
C: Reduction
D: Regeneration of CO2 acceptor (RuBP)
Q NO 83.Grassland ecosystems are common in Pakistan like in?
A: Chinji
B: Lal Sunhara
C: Magalla
D: Deosai
Q NO 84.A large regional community primarily determined by climate is?
A: Biome
B: Biotype
C: Ecotone
D: Range
Q NO 85.Which of the following trophic level represents the carnivores?
A: Producers
B: Primary consumers
C: Secondary consumers
D: Decomposers
Q NO 86.Without this phenomenon average temperature of the earth might be less than -71°C?
A: Ozone depletion
B: Greenhouse effect
C: Deforestation
D: Desertification
Q NO 87.Morphology similar or identical populations which are reproductively isolated are?
A: Sibling species
B: Allopatric species
C: Parapatric species
D: Geographical species
Q NO 88.These rocks are rich in fossils?
A: Igneous rocks
B: Sedementary rocks
C: Metamorphic rocks
D: Salt mines
Q NO 89.Human dentition is of type?
A: Lophodont
B: Selenodont
C: Bunodont
D: Hypsodont
Q NO 90.Darwin was strongly influenced by the book An Essay on the Principles of Population written by?
A: Erasmus
B: Linnaeus
C: Wallace
D: Malthus
Q NO 91.Sahara desert demark the regions?
A: Ethiopian and Palearctic
B: Oriental and Neotropical
C: Ethiopian and Oriental
D: Palearctic and Nearctic
Q NO 92.An endemic species is ……?
A: Epidemic disease
B: A taxonomist’s mistake
C: A taxonomist’s choice
D: Which is found uniquely in one place
Q NO 93.The specimen on which the taxonomic description is based is?
A: Holotype
B: Homotypic
C: Heterotypic
D: Homonym
Q NO 94.This is small locally located Subpopulation of organisms subjected to selection?
A: Cline
B: Phenon
C: Deme
D: Axon
Q NO 95.Wildlife of Pakistan includes a unique aquatic mammal protected by various wildlife agencies?
A: Blue Dolphin
B: Porpoise
C: Sea Whale
D: Blind Dolphin
Q NO 96.An organism that has escaped from domestication and returned, partly or wholly, to a wild state is called?
A: Native
B: Vulnerable
C: Ferals
D: Semi-wild
Q NO 97.When a single gene effects two or more traits, the phenomenon is called?
A: Transposition
B: Transduction
C: Epistasis
D: Pleiotropy
Q NO 98.This is a polyunsaturated fatty acid?
A: Oleic acid
B: Linleic acid
C: Palmitic acid
D: Palmitleic acid
Q NO 99.Insulin has 51 amino acids, which are arranged in two polypeptide chains having?
A: 20 & 31 amino acids
B: 11 & 40 amino acids
C: 21 & 31 amino acids
D: 25 & 26 amino acids
Q NO 100.In Microcephaly, the individuals are born with small?
A: Skull
B: Eyes
C: Brain
D: Hands