Biology MCQ (Multiple Choice Questions) - SchoolingAxis

Biology MCQ (Multiple Choice Questions)

 Que- Study of human population and things that affect them is 

a. Ecology 

b. Demography 

c. Demology 

d. Environment study 

Answer- Demography

Que- Rate of population growth in 1980s was 

a. 0.1 

b. 0.01 

c. 0.02 

d. 0.15 

Answer- 0.02

Que- Replantation of plants in the areas where they were present earlier is called 

a. Deforestation 

b. Aforestation 

c. Forestation 

d. Reforestation 

Answer- Reforestation

Que- Establishment of new forests where no forests existed previously is called 

a. Reforestation 

b. Forestation 

c. Neofrestation 

d. Aforestation 

Answer- Aforestation

Que- Which is environmental buffer? 

a. Mountains 

b. Deserts 

c. Forests 

d. Oceans 

Answer- Forests

Que- About half of the rain which falls in tropical forests comes from 

a. High winds 

b. Cold surroundings 

c. Transpiration of plants 

d. Surrounding seas 

Answer- Transpiration of plants

Que- Biodiversity is 

a. Total number of species in a community 

b. Total number of species in an ecosystem 

c. Total number of genus in an ecosystem 

d. None of these 

Answer- Total number of species in an ecosystem

Que- Which statement is not true about ozone? 

a. Bluish 

b. Explosive 

c. 10-50 km 

d. O2 

Answer- O2

Que- Ozone depletion is commonly caused by 

a. CFCs 

b. Industrial smoke 

c. Heavy nitrogen gasses 

d. Carbon dioxide 

Answer- CFCs

Que- Diseases caused by UV rays in humans 

a. Skin cancers 

b. Cataracts 

c. Night blindness 

d. Both a and b 

Answer- Both a and b

Que- Which gas commonly causes green house effect? 

a. Hydrogen sulphide 

b. Carbon dioxide 

c. Nitrogen gas 

d. Carbon monoxide 

Answer- Carbon dioxide

Que- Causes of green house effect are 

a. Over urbanization 

b. Deforestation 

c. Industrialization 

d. All of these 

Answer- All of these

Que- Sun rays are reradiated from the earth's surface in the form of 

a. Long wave radiations 

b. Short wave radiations 

c. Radiowaves 

d. Medium waves 

Answer- Long wave radiations

Que- Incomplete burning of carbon compounds cause release of 

a. Carbon dioxide 

b. Carbon monoxide 

c. Oxides of nitrogen 

d. CFCs 

Answer- Carbon monoxide

Que- Acid rain is caused by 

a. Sulphur dioxide 

b. Oxides of nitrogen 

c. Both a and b 

d. None of these 

Answer- Both a and b

Que- Algal bloom is also called as 

a. Deforestation 

b. Eutrophication 

c. Neotrophication 

d. Lichen 

Answer- Eutrophication

Que- The chemical wastes from industry is called 

a. Industrial litter 

b. Industrial trash 

c. Industrial effluents 

d. Industrial deffluents 

Answer- Industrial effluents

Que- Pesticides and fertilizers are also called 

a. Pestochemicals 

b. Industrochemicals 

c. Killing chemicals 

d. Agrochemicals 

Answer- Agrochemicals

Que- Which are more susceptible to attacks of pests? 

a. Multicultures 

b. Monocultures 

c. Dicultures 

d. Polycultures 

Answer- Monocultures

Que- Which disease does not match its etiology? 

a. Kwashiorkor is a nutritional deficiency 

b. Alzheimer is a mental illness 

c. Cretinism is due to hormonal imbalance 

d. Cholera is physical disorder 

Answer- Cholera is physical disorder

Que- Detergents usually release 

a. Carbonates 

b. Sulphates 

c. Phosphates 

d. Nitrates 

Answer- Phosphates

Que- Diphtheria is 

a. Genetic disease 

b. Pathogenic disease 

c. Metabolic disease 

d. Nutritional disease 

Answer- Pathogenic disease

Que- Which one the following is not nutritional disease? 

a. Scurvy 

b. Anemia 

c. Goiter 

d. Diabetes 

Answer- Diabetes

Que- Unbroken series of organisms arranged from ancestor to descendant sequence is 

a. Biodiversity 

b. Phyletic lineage 

c. Connecting link 

d. Evolutionary line 

Answer- Phyletic lineage

Que- Control of organisms by using living organisms is called 

a. Bioremediation 

b. Integrated disease management 

c. Antisepsis 

d. Biological control 

Answer- Biological control

Que- Branch of biology which deals with the study of chemical components and chemical processes in living organisms is called 

a. Molecular biology 

b. Physiology 

c. Biochemistry 

d. Atomic biology 

Answer- Biochemistry

Que- _______ is the potential surce of chemical energy for cellular activities 

a. C-H bond 

b. C-O bond 

c. C-N bond 

d. P-O-C bond 

Answer- C-H bond

Que- Percentage of water in brain cells is 

a. 0.2 

b. 0.65 

c. 0.85 

d. 0.89 

Answer- 0.85

Que- Breakdown of large molecules into smaller ones utilizing water molecules is 

a. Hydration 

b. Hydrolysis 

c. Dehydration synthesis 

d. Electrolysis 

Answer- Hydrolysis

Que- A chemical substance that reacts with enzyme but is not transformed into product and thus blocking active site is called 

a. Substrate 

b. Co-factor 

c. Inhibitor 

d. Promotor 

Answer- Inhibitor

Que- Intake of liquid material by cell membrane is called 

a. Endocytosis 

b. Exocytosis 

c. Phagocytosis 

d. Pinocytosis 

Answer- Pinocytosis

Que- Ribosomes were discovered by 

a. Golgi 

b. De Duve 

c. Palade 

d. R.Brown 

Answer- Palade

Que- _______ is concerned with cell secretions 

a. Endoplasmic reticulum 

b. Golgi complex 

c. Lysosomes 

d. Cell membrane 

Answer- Golgi complex

Que- Cytoskeleton involved in assembly and disassembly of the spindle during mitosis is of 

a. Microtubules 

b. Microfilaments 

c. Intermediate filaments 

d. None of these 

Answer- Microtubules

Que- Reverse transcriptase is present in 

a. All RNA viruses 

b. All DNA viruses 

c. All retroviruses 

d. All viruses 

Answer- All retroviruses

Que- Pox viruses are 

a. RNA non-enveloped 

b. RNA enveloped 

c. DNA non-enveloped 

d. DNA enveloped 

Answer- DNA enveloped

Que- Bacteria which grow either in the presence or absence of oxygen 

a. Aerobic bacteria 

b. Anaerobic bacteria 

c. Facultative bacteria 

d. Microaerophilic 

Answer- Facultative bacteria

Que- Destruction of all life forms is called 

a. Sterilization 

b. Disinfection 

c. Antisepsis 

d. Preservation 

Answer- Sterilization

Que- _______ is used to relieve one kind of headache, migraine 

a. Pencillin 

b. Lovastatin 

c. Cyclosporine 

d. Ergotin 

Answer- Ergotin

Que- The single healthy megaspore retained within the megasporangium germinates to form an egg containing female gaemtophyte called 

a. Ovule 

b. Seed 

c. Fruit 

d. Embroyo sac 

Answer- Embroyo sac

Que- Pollen grains in pinus have _____ for dispersal through wind 

a. Flagella 

b. Cilia 

c. Wings 

d. Feathers 

Answer- Wings

Que- Double fertilization is feature of 

a. Ferns 

b. Whisk ferns 

c. Gymnosperms 

d. Angiosperms 

Answer- Angiosperms

Que- Alternation of generations is absent in 

a. Hydration 

b. Obelia 

c. Jelly fish 

d. Physalia 

Answer- Hydration

Que- Enterobius vermicularis is commonly known as 

a. Flatworm 

b. Pinworm 

c. Hook worm 

d. Tapeworm 

Answer- Pinworm

Que- Animals of which class of arthropoda are present everywhere 

a. Crustacean 

b. Insecta 

c. Arachnida 

d. Myriapoda 

Answer- Insecta

Que- Amphibians are considered to be evolved from 

a. Newts 

b. Varanope 

c. Dipnoi 

d. Hagfishes 

Answer- Dipnoi

Que- Red to orange pigments are 

a. Carotenes 

b. Carotenoids 

c. Xanthophylls 

d. Chlorophyll 

Answer- Carotenes

Que- NADH is oxidized by 

a. Coenzyme ? 

b. Cytochrome b 

c. Oxygen 

d. Glycolysis 

Answer- Coenzyme ?

Que- Salivary glands present in front of ear are 

a. Sublingual 

b. Submaxillary 

c. Submandibular 

d. Parotid 

Answer- Parotid

Que- If bile pigments are prevented from leaving digestive tract, then they cause 

a. Hepatitis 

b. Jaundice 

c. Gall stones 

d. Blockage 

Answer- Jaundice

Que- How many spiracles are present in cockroach 

a. 5.0 

b. 10.0 

c. 20.0 

d. 40.0 

Answer- 20.0

Que- Gaseous exchange in birds occurs at level of 

a. Alveoli 

b. Air sacs 

c. Bronchi 

d. Parabronchi 

Answer- Parabronchi

Que- An infectious disorder of respiratory system is 

a. Cancer 

b. Asthma 

c. Tuberculosis 

d. Emphysema 

Answer- Tuberculosis

Que- According to cohesion-tension theory, tension is created by 

a. Hydrogen bonding 

b. Transpiration 

c. Adhesion 

d. Root prerssure 

Answer- Transpiration

Que- Cuticular transpiration is _______ of total transpiration 

a. 1-2% 

b. 3-4% 

c. 5-7% 

d. 0.9 

Answer- 5-7%

Que- _______ cells of phloem are directly involved in transport of organic solutes 

a. Parenchyma 

b. Companion cell 

c. Tracheid 

d. Sieve element 

Answer- Sieve element

Que- Deoxygenated blood first enters in _____ part in fishes 

a. Sinus venosus 

b. Right atrium 

c. Left atrium 

d. Conus arteriosus 

Answer- Sinus venosus

Que- 95% of the cytoplasm of RBCs is 

a. Hemoglobin 

b. Enzymes 

c. Salts 

d. Other proteins 

Answer- Hemoglobin

Que- 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 

Answer- Closure of inlet valve

Que- An antibody is made of _____ polypeptide chains 

a. 1.0 

b. 2.0 

c. 3.0 

d. 4.0 

Answer- 4.0

Que- _______ of earth surface is covered with water 

a. 0.1 

b. 0.3 

c. 0.75 

d. 0.9 

Answer- 0.75

Que- Ozone depletion occurs commonly due to 

a. Carbon dioxide 

b. Chlorofluorocarbons 

c. UV rays 

d. Deforestation 

Answer- Chlorofluorocarbons

Que- The productivity of aquatic ecosystem is basically determined by light and 

a. CO2 

b. O2 

c. Water 

d. Nutrients 

Answer- Nutrients

Que- Ecosystem not found in Pakistan is 

a. Tropical rain forest 

b. Temperate deciduous forest 

c. Grassland 

d. Tundra 

Answer- Tropical rain forest

Que- Annual rainfall in grassland is about 

a. More than 2500 mm 

b. 750-1500 mm 

c. 250-750 mm 

d. Less than 250 mm 

Answer- 250-750 mm

Que- Which of the following is most constant abiotic component of ecosystem 

a. Air 

b. Water 

c. Land 

d. Gravity 

Answer- Gravity

Que- Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due to 

a. Rhizobium 

b. Nitrosomonas 

c. Nitrobacter 

d. Pseudomonas 

Answer- Nitrosomonas

Que- _______ supported theory of special creation 

a. Linnaeus 

b. Aristotle 

c. Mendel 

d. Lamarck 

Answer- Linnaeus

Que- In Hardy-Weinberg formula P2 represents frequency of 

a. Recessive allele 

b. Dominant allele 

c. Homozygous dominant individual 

d. Homozygous recessive individual 

Answer- Homozygous dominant individual

Que- Humming bird is an example of 

a. Cold blooded animal 

b. Ectotherm 

c. Endotherm 

d. Heterotherm 

Answer- Heterotherm

Que- 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 

Answer- Thermogenesis

Que- Sapwood is formed from 

a. Primary xylem 

b. Secondary xylem 

c. Primary phloem 

d. Secondary phloem 

Answer- Secondary xylem

Que- Number of cervical vertebrae is 

a. 5.0 

b. 7.0 

c. 9.0 

d. 12.0 

Answer- 7.0

Que- Joints present in skull are example of 

a. Fibrous joints 

b. Cartilaginous joints 

c. Synovial Joints 

d. Slightly moveable joints 

Answer- Fibrous joints

Que- Only myosine is present in 

a. A band 

b. 1 band 

c. H zone 

d. Sarcomere 

Answer- H zone

Que- __________ 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 

Answer- Parkinson's disease

Que- Which of the following hormone is polypeptide in nature 

a. Insulin 

b. Thyroxine 

c. ADH 

d. Cortisone 

Answer- ADH

Que- Secretin inhibits production of 

a. Gastric juice 

b. Pancreatic juice 

c. Bile 

d. All of these 

Answer- Gastric juice

Que- Highest form of learning is 

a. Latent learning 

b. Insight learning 

c. Operant conditioning 

d. Instinct 

Answer- Insight learning

Que- Far-red light promotes flowering in 

a. Short day plant 

b. Long day plant 

c. Day neutral plant 

d. None of these 

Answer- Short day plant

Que- In human female, fertilization commonly occurs at 

a. Proximal part of oviduct 

b. Distal part of oviduct 

c. Uterus 

d. Cervix 

Answer- Proximal part of oviduct

Que- Yellowish glandular structure which produces progesterone is 

a. Graffian follicle 

b. Ovary 

c. Corpus luteum 

d. Placenta 

Answer- Corpus luteum

Que- Yellow cytoplasm in ascidian gives rise to 

a. Epidermis 

b. Muscle cells 

c. Gut 

d. Notochord 

Answer- Muscle cells

Que- Embryonic induction is caused by part developing from 

a. Endoderm 

b. Ectoderm 

c. Mesoderm 

d. Extraembryonic layers 

Answer- Mesoderm

Que- Okazaki fragments are connected together through action of 

a. Primase 

b. Polymerase 

c. Helicase 

d. Ligase 

Answer- Ligase

Que- Sickle cell anemia is an example of 

a. Chromosomal aberration 

b. Insertion of gene 

c. Deletion of gene 

d. Point mutation 

Answer- Point mutation

Que- Which of the following is an autosomal disorder 

a. Down's syndrome 

b. Klinifelter's syndrome 

c. Turner's syndrome 

d. Jacob's syndrome 

Answer- Down's syndrome

Que- Test cross is used to find 

a. Trait 

b. Phenotype 

c. Genotype 

d. Ratios 

Answer- Genotype

Que- An example of codominance is 

a. A' blood group 

b. B' blood group 

c. O' blood group 

d. AB' blood group 

Answer- AB' blood group

Que- XO-XX pattern of sex determination is present in 

a. Grasshopper 

b. Butterfly 

c. Drosophila 

d. Man 

Answer- Grasshopper

Que- Tibia is a bone found in the ____________? 

a. Skull  

b. Arm  

c. Leg  

d. Face 

Answer- Leg

Que- Which is the largest gland in the human body? 

a. Thyroid  

b. Liver  

c. Pancreas  

d. None of these 

Answer- Liver

Que- Water has maximum density at____________? 

a. 0°C  

b. 4°C  

c. 4° K  

d. 4.8°C 

Answer- 4°C

Que- The scientific study of livings is called? 

a. Anatomy  

b. Biology  

c. Geology  

d. Zoology 

Answer- Biology

Que- The word “BIOLOGY” has been derived from_________ word? 

a. Latin  

b. English  

c. Greek  

d. French 

Answer- Greek

Que- According to modern system of taxonomy, living organisms have been classified into? 

a. Three Kingdoms  

b. Five Kingdoms  

c. Two Kingdoms  

d. Six Kingdoms 

Answer- Five Kingdoms

Que- Kingdom Protoctista includes____________? 

a. Fungi  

b. Prokaryotes  

c. protists  

d. Piantae 

Answer- protists

Que- Kingdom Fungi includes_______________? 

a. A cellular, eukaryotic organisms  

b. Non-chlorophylls, multicellular eukaiyotlc organisms  

c. Non-chlorophylls, multioellular,thailophytic organisms  

d. Chlorophyllus, multicellular, eukaryotic Organisms 

Answer- Non-chlorophylls, multioellular,thailophytic organisms

Que- Earthworm is included in_____________? 

a. Kingdom Plantae  

b. Kingdom Protoctista  

c. Kingdom Monera  

d. Kingdom Animalia 

Answer- Kingdom Animalia

Que- The Study of organisms inhabiting the sea and Ocean and the physical and chemical characteristics of their environment is: 

a. Social Biology  

b. Marine Biology  

c. Environmental Biology  

d. Fresh Water Biology 

Answer- Marine Biology

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