Biology is the natural science that involves the study of life and living organisms, including their physical structure, chemical composition, function, development and evolution.Biology recognizes the cell as the basic unit of life, genes as the basic unit of heredity, and evolution as the engine that propels the creation of new species. Living organisms are open systems that survive by transforming energy and decreasing their local entropy to maintain a stable and vital condition defined as homeostasis. Biology divided into many specialized fields that cover their morphology, physiology, anatomy, behaviour, origin, and distribution.Just follow the Mcqs online quiz being dispatched over here with respect to your preparation for entry admission test NTS PPSC OTS PTS and missllenous job exams simultaneously.
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Biology Mcqs Online with Answers for NTS PPSC Entry Test Classes
Biology
Biology Mcqs with Answers Solved.
Establishment of new forest where no forest existed before is known as?
A. Deforestation
B. Reforestation
C. Desertification
D. Aforestation
Right Answer: D. Aforestation
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Nucleohiston play important role in regulation of?
A. Gene expression
B. Replication
C. Cell division
D. Metabolism
Right Answer: A. Gene expression
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Which of the following muscles is inserted in the ulna?
A. biceps brachii
B. brachialis
C. brachioradialus
D. Both b and c
Right Answer: B. brachialis
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In planaria undigested food is egested through the?
A. Anus
B. Blastopore
C. Mouth
D. Cloaca
Right Answer: C. Mouth
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Biorhythms may show periodicity of about 24 hours called?
A. Circadian
B. Diurnal rhythms
C. Circannual
D. Both a and b
Right Answer: D. Both a and b
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Total number of endocrine glands / tissues?
A. 10
B. 20
C. 30
D. 40
Right Answer: B. 20
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Which of the following inhibit the growth of Micro-organism on living Surface?
A. disinfectants
B. Antiseptic
C. Antibiotics
D. All of these
Right Answer: B. Antiseptic
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Poly siphonia is an example of?
A. Chloroplyta
B. Euglenophyta
C. Dino flagellates
D. Rhodophyta
Right Answer: D. Rhodophyta
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Total bones in human skull is?
A. 24
B. 18
C. 206
D. 22
Right Answer: D. 22
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Who for the first time argued from evidence that species were not specially created in their present forms, rather they had evolved from ancestral species?
A. Lamarck
B. Lyell
C. Darwin
D. Linnaeus
Right Answer: C. Darwin
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Who introduced binomial nomenclature for naming species?
A. Linnaeus
B. Lamarck
C. Malthus
D. Cuvier
Right Answer: A. Linnaeus
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Sciatica results due to injury of?
A. Proximal sciatic nerve
B. Distal sciatic nerve
C. Anterior sciatic nerve
D. Posterior sciatic nerve
Right Answer: A. Proximal sciatic nerve
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Complete mixing of oxygenated and deoxygenated blood in ventricle is observed in?
A. Fishes
B. Amphibians
C. Reptiles
D. All vertebrates
Right Answer: B. Amphibians
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In peritoneal dialysis, peritoneal cavity is filled with dialysis fluid that enters the body through a?
A. Vein
B. Catheter
C. Shunt vein
D. Urethra
Right Answer: B. Catheter
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The functional specificity of every enzyme is due to its?
A. Special chemistry
B. Specific configuration
C. Both a and b
D. None of these
Right Answer: C. Both a and b
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Generals hormones are?
A. Acetylcholine
B. Growth hormone
C. Secretin
D. Cholecystokinin
Right Answer: B. Growth hormone
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Number of cranial nerves present in the brain of bony fishes?
A. 10
B. 20
C. 30
D. 40
Right Answer: B .20
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Non-surgical removal of kidney stone is?
A. Dialysis
B. Lithotripsy
C. Uremia
D. None of these
Right Answer: B. Lithotripsy
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What is the function of brown fats in mammals?
A. Prevent dehydration
B. Promote evaporation
C. Specialized for rapid heat production
D. Involve in vasodilatation and vasoconstriction
Right Answer: B. Promote evaporation
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Which one is Globular protein?
A. Antibodies
B. Fibrin
C. Myosin
D. Keratin
Right Answer: A. Antibodies
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Permeability of gram negative bacteria is?
A. Equal to gram positive
B. More than gram positive
C. Less than gram positive
D. None of these
Right Answer: C. Less than gram positive
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A shipworm damages wooden parts of the ship is?
A. Teredo
B. Ostrea
C. Loligo
D. Mytilus
Right Answer: A. Teredo
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The electromagnetic ray used in sterilization process?
A. α – rays
B. β – rays
C. γ – rays
D. None of these
Right Answer: C. γ – rays
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95% of our daily energy requirements are met with?
A. Wind power
B. Tidal power
C. Fossil fuels
D. Hydroelectric power
Right Answer: C. Fossil fuels
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The algal partners in a lichen?
A. is vascular plant roots
B. is Root nodules
C. is Autotrophic algae
D. is parasitic
Right Answer: C. is Autotrophic algae
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Which of the following is caused by RNA enveloped virus?
A. Influenza
B. Mumps
C. Hepatitis – c
D. All of these
Right Answer: D. All of these
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Today crop production is limited by effects of Salinization at about?
A. 30%
B. 40%
C. 50%
D. 60%
Right Answer: C. 50%
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Which of the following process probably freed living organisms from dwindling supply of nutrients?
A. Aerobic respiration
B. Replication
C. Digestion
D. Photosynthesis
Right Answer: D. Photosynthesis
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In which type of learning reasoning is involved?
A. Latent learning
B. Insight learning
C. Operant learning
D. Imprinting
Right Answer: B. Insight learning
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In favourable conditions slime mold spores germinate into?
A. Zygote
B. Swarm cells
C. Sporophyte generation
D. Gametocytes
Right Answer: B. Swarm cells
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In plant long term co-ordination is brought about through?
A. Nervous system
B. Hormones
C. Endocrine system
D. None of these
Right Answer: B. Hormones
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A common genetic code is the evolutionary evidence from?
A. Comparative anatomy
B. Molecular biology
C. Comparative embryology
D. Biogeography
Right Answer: B. Molecular biology
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Which one play important role in the maintenance f cell shape?
A. Microtubules
B. Microfilaments
C. Intermediate filaments
D. All of these
Right Answer: C. Intermediate filaments
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In honeybees, union of sperm and egg result into the development of diploid except?
A. Drone bee
B. Queen bee
C. Worker bee
D. None of these
Right Answer: A. Drone bee
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Testosterone is produced by?
A. Semiinferous tubules
B. interstitial cells
C. Epididymis
D. Sperm duct
Right Answer: B. interstitial cells
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In small pox raised fluid filled vesicles are formed?
A. Papules
B. Macules
C. Pustules
D. None of these
Right Answer: C. Pustules
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The most volume of chloroplast is covered by?
A. Envalope
B. Stroma
C. Thylakoid
D. None of these
Right Answer: B. Stroma
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During contraction of muscles which of the following does not decrease?
A. I – bond
B. H – bond
C. length of sarcomere
D. A bond
Right Answer: A. A bond
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What is function of Epiodidmysis?
A. Maturation of sperms
B. Nourishment of sperms
C. Protection of sperms
D. All of these
Right Answer: A. Maturation of sperms
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The marginal area of the blastoderm in the cells remain undetached from the yolk and closely adherent to it is called the?
A. Area pellucida
B. Area opaca
C. Zone of junction
D. Both b and c
Right Answer: C. Zone of junction
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Vitamin “D” deficiency causes?
A. Rickets
B. Osteomalcia
C. Sponydylosis
D. Both a and b
Right Answer: A. Rickets
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The chaetae are absent in?
A. Nereis
B. Stylaria
C. Hirudo
D. All of these
Right Answer: C. Hirudo
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Site for urea cycle in the body is?
A. The kidney
B. The liver
C. The spleen
D. All of these
Right Answer: B. The liver
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Which of the following conditions is related to conduction of nerve impulse?
A. Na+ are more outside than inside cell
B. Sodium gates closed
C. Inside of the membrane is positive
D. Large number of negative inorganic ions inside the membrane
Right Answer: C. Inside of the membrane is positive
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In arthropods nitrogenous wastes are excreted in the form of?
A. Ammonia
B. Urea
C. Uric acid
D. All of these
Right Answer: C. Uric acid
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What is the correct route of urine from kidneys to out of body?
A. Pelvis → Urinary bladder → urethra
B. Pelvis → Urinary bladder → urethra → through penis in males
C. Pelvis → ureter → urethra → through vagina in females
D. Pelvis → ureter → urinary bladder → urethra
Right Answer: C. Pelvis → ureter → urethra → through vagina in females
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The lymph vessels empty in?
A. Arteries
B. Veins
C. Capillaries
D. All of these
Right Answer: B. Veins
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Bacteriograph viruses that infect bacteria were discovered independent by?
A. Watson and Crick
B. Schwann and Shleiden
C. Towert and Herelle
D. Stanley and Sutton
Right Answer: C. Towert and Herelle
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Commonly used restriction enzyme is?
A. Eco R1
B. p SC101
C. pBR322
D. All of these
Right Answer: A. Eco R1
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Sclerotization and impregation with calcium carbonate take place in?
A. Procuticle
B. Epicticual
C. Ectoderm
D. Both a & b
Right Answer: A. Procuticle
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Nervous system design is highly co – related with animals?
A. Life history
B. Life style
C. Evolution
D. Size and shape
Right Answer: B. Life style
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Adjustment in the body postures to economize heat loss and heat gain is?
A. Structural adaption
B. Physiological adaption
C. Behavioral adaption
D. All of these
Right Answer: C. Behavioral adaption
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Which is correct about co-factor?
A. Non proteins part
B. Act as bridge
C. Essential for normal functioning
D. All a, b and c
Right Answer: D. All a, b and c
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According to Endosymbiont hypothesis aerobic bacteria develop into?
A. Mitochondria
B. Flagella
C. Nucleus
D. All of these
Right Answer: A. Mitochondria
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The organisms which obtain energy directly or indirectly from producers as ready made organic food are called?
A. Decomposers
B. Consumers
C. Parasites
D. All of these
Right Answer: B. Consumers
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Which of the following have sheet like body?
A. Spirogyra
B. Volvox
C. Chlamydomonas
D. Ulva
Right Answer: D. Ulva
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Apart from urea, which of these does mammalian urine also contains?
A. Suerose
B. Water
C. Protein
D. Ammonium compound
Right Answer: B. Water
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In which phase of menstrual cycle progesterone is released from corpus Luteum.
A. Proliferative phase
B. Secretory phase
C. Menstruation phase
D. None of these
Right Answer: B. Secretory phase
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The cross bridges of sarcomeres in skeletol muscles are usually made up of?
A. Actin
B. Myosin
C. Troponin
D. Tropomyosin
Right Answer: B. Myosin
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Patients lack a gene that cods for trans-membrane carrier of the chloride ions in?
A. SCID
B. Familial Hypercholesterolemia
C. Cystic fibrosis
D. CANCER
Right Answer: C. Cystic fibrosis
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Which of the following has maximum surface area to volume ratio?
A. Virus
B. Bacteria
C. Amoeba
D. Euglena
Right Answer: C. Amoeba
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Wave of blood pressure or pulse due to heartbeat can be defected in?
A. Arteries
B. Veins
C. Capillaries
D. All of these
Right Answer: A. Arteries
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Histamine acts usually on smooth muscles of?
A. Trachea
B. Bronchi
C. Bronchioles
D. All of these
Right Answer: C. Bronchioles
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The company sequenced the entire genome is?
A. Craig
B. Venter
C. Celera
D. Chimaeric
Right Answer: C. Celera
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Which of the following may be the most primitive of all eukaryotic life forms?
A. Amoeba
B. Gaintamoeba
C. Paramecium
D. Plasmodium
Right Answer: B. Gaintamoeba
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Which of the following statement is not true about protostomes?
A. Cleavage is radial and indeterminate
B. Mesoderm is derived from the wall of gut
C. Coelom is developed as an outpouching of archeteron
D. Mouth arise from blastopore
Right Answer: D. Mouth arise from blastopore
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Asexual phase of the life cycle of malarial parasite is complete in?
A. Mosquito
B. Human
C. Insects
D. Both a and b
Right Answer: B. Human
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Which of the following is not Angiosperms?
A. Pyrus
B. Oats
C. Cycas
D. Both a and c
Right Answer: C. Cycas
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Embryo sac consist of?
A. 5 cells
B. 6 cells
C. 7 cells
D. 8 cells
Right Answer: C. 7 cells
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Which of the following technique astronauts can use for growing vegetables?
A. Tissue culture technique
B. Hydroponic culture technique
C. Colning
D. Integrated disease management
Right Answer: B. Hydroponic culture technique
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The most abundant cartilage in human body is?
A. Hyaline
B. Elastic
C. Fibre
D. None of these
Right Answer: A. Hyaline
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Total no. of species discovered?
A. 2,500,000
B. 25000
C. 250000
D. 2.500
Right Answer: A. 2,500,000
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Which of the following is true about mammals?
A. They have right aortic arch only
B. They have left aortic arch only
C. They have left and right aortic arches only
D. They do not have aortic arches
Right Answer: B. They have left aortic arch only
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Movement of materials against concentration gradient through plasma membrane is termed as?
A. Osmosis
B. Passive transport
C. Active transport
D. Diffusion
Right Answer: C. Active transport
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The edge of fern sporangium is divided?
A. Two parts
B. Three parts
C. Four parts
D. Five parts
Right Answer: A. Two parts
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Which of the following is anti viral / anti cancer protein?
A. Urokinase
B. Thymosin
C. Insulin
D. Interferon
Right Answer: D. Interferon
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Absorption of water and minerals takes place in?
A. Small intestine
B. Large intestine
C. Jejumum
D. Ileum
Right Answer: B. Large intestine
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Meiosis does not occur at?
A. Formation of egg in Honey bee
B. Formation of egg in aphid
C. Formation of egg in man
D. Formation of egg in rose
Right Answer: A. Formation of egg in Honey bee
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Grass land present in temperate climates are also called?
A. Prairies
B. Savanna
C. Alpine
D. Boreal
Right Answer: A. Prariries
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Heart is present inside?
A. Chest cavity
B. Pleural cavity
C. Pericardial cavity
D. Thorax
Right Answer: C. Pericardial cavity
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Which ecological term refers to more than one species?
A. Community
B. Habitate
C. Niche
D. Population
Right Answer: A. Community
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Which of the following pair is mismatched?
A. Insecta: Three pairs of jointed legs
B. Myriapoda: Body is divide into large number of segments
C. Arachnida: Appendages called chelicerae
D. Crustacae: Mites and ticks
Right Answer: D. Crustacae: Mites and ticks
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If the amount of enzyme is increase by two fold the reaction rate is?
A. Decreased
B. Increased
C. Unaffected
D. Doubled
Right Answer: D. Doubled
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The total inside capacity of lungs is about?
A. 3 liters
B. 4 liters
C. 5 liters
D. 3.5 liters
Right Answer: C. 5 liters
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Seal / fish food relationship is?
A. parasitism
B. symbiosis
C. predation
D. mutualism
Right Answer: C. predation
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A preferable vehicle for a biotechnology product is known as?
A. Milk
B. Salive
C. Urine
D. Blood
Right Answer: C. Urine
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Cohesion tension theory was proposed by?
A. Sacks
B. Dixon
C. Koch
D. Munch
Right Answer: B. Dixon
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Which one of the following is a kind of chemical link b/w catabolism and anabolism?
A. NAD
B. NADPH2
C. ATP
D. FAD
Right Answer: C. ATP
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Protein present in microbubules is?
A. Tubulin
B. Actin
C. Tropomyosin
D. Myosin
Right Answer: A. Tubulin
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Antibodies are manufactured by?
A. B – lymphocytes
B. T – lymphocytes
C. Both a and b
D. None of these
Right Answer: A. B – lymphocytes
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The second major producers of aquatic ecosystem is?
A. Green Algae
B. Dinoflagellates
C. Diatoms
D. Both b and c
Right Answer: B. Dinoflagellates
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Menstrual blood not clot due to?
A. It is mostly arterial in nature
B. First polar body
C. Both a and b
D. None of these
Right Answer: C. Both a and b
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The stomach is situated below the diaphragm on the?
A. Left side of abdominal cavity
B. Right side of abdominal cavity
C. Middle of abdominal cavity
D. None of these
Right Answer: A. Left side of abdominal cavity
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The cork tissue has special pores called?
A. Stomata
B. Lenticels
C. Micropyl
D. Both a and b
Right Answer: B. Lenticels
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Which of the following is not a midhight grass in grass land ecosystem?
A. Stipa
B. Sporoblus
C. Oryzopsis
D. Bromus
Right Answer: D. Bromus
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True statement about lung cancer is?
A. 75% caused by smoking
B. 85% caused by smoking
C. 80% caused by smoking
D. 90% caused by smoking
Right Answer: D. 90% caused by smoking
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The space between lungs and pleural membrane termed as?
A. Chest cavity
B. Pleural cavity
C. Thoracic cavity
D. Both a and c
Right Answer: B. Pleural cavity
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What is Prophage?
A. RNA virus
B. a hybrid of bacterial and viral DNA
C. a stage in lytic cycle
D. None of these
Right Answer: B. a hybrid of bacterial and viral DNA
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A parasitic angiosperms that lack chlorophyll is?
A. Fragrant water lily
B. Wild geranium
C. Indian pipe
D. None of these
Right Answer: C. Indian pipe
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Leaves of the ferns are?
A. Simple
B. Compound
C. Needle like
D. Underground
Right Answer: B. Compound
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