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.
Pasteurization is widely used to preserve?
A. Pickle
B. Vegetable
C. Chicken
D. Milk and Milk products
Right Answer: D. Milk and Milk products
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Male copulatory organ is?
A. Testis
B. Penis
C. Prepuce
D. Scrotum
Right Answer: B. Penis
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Co-ordinated movements of the body are maintained by?
A. Amygdala
B. Thalamus
C. Pons
D. Cerebellum
Right Answer: D. Cerebellum
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Which rays are not used in lithotripsy?
A. X – rays
B. Gamma rays
C. Ultrasounds
D. None of these
Right Answer: B. Gamma rays
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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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Lungs are present in?
A. Chest cavity
B. Thoracic
C. Pleural cavity
D. Both a and b
Right Answer: D .Both a and b
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Brownish colour of the stool or fecal matter is due to?
A. Slouged off mucosal cells
B. Plant fibers
C. Cholesterols
D. Bile pigmets
Right Answer: D. Bile pigments
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In the glottis the mucous membrane is stretched across into two thin edged fibrous band called?
A. Vocal sacs
B. Vocal cords
C. Voice box
D. Voice cords
Right Answer: B. Vocal cords
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Number of ascospores in each Ascus is?
A. Two
B. Four
C. Eight
D. Ten
Right Answer: C. Eight
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Saprophytic plants produced (to get food)?
A. Itracellular enzymes
B. Extra Cellular enzymes
C. No enzymes
D. Both a & c
Right Answer: B. Extra cellular enzymes
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What is the function of heat – shock proteins in plants?
A. Cause evaporative cooling
B. Control opening and closing of stomata
C. Prevent denaturation of enzymes
D. Changes the solute composition of the cell
Right Answer: C. Prevent denaturation of enzymes
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Environmental factors causing or contributing to abnormal development are grouped together as?
A. Trisomy
B. Harelip
C. Teratogens
D. None of these
Right Answer: C. Teratogens
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The path of electron through two photo system during non cyclic photo phosphorylation is?
A. N – Scheme
B. P – Scheme
C. Z – Scheme
D. M – Scheme
Right Answer: C. Z – Scheme
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Which of the following is a genetic disorder?
A. Lecuaemia
B. Thalassaemia
C. Oedema
D. Cyanosis
Right Answer: B. Thalassaemia
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Optimum temperature of human body is?
A. 37K
B. 37F
C. 37C°
D. All of these
Right Answer: C. 37C°
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Tides are mainly caused by the gravitational pull of the?
A. Sun
B. Earth
C. Moon
D. All of these
Right Answer: C. Moon
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Which of the following is not accordance with phyletic lineage?
A. Reptiles evolved from amphibians
B. Birds evolved from reptiles
C. Mammals evolved from birds
D. Both birds and mammals evolved from reptiles
Right Answer: C. Mammals evolved from birds
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Most fossils are found in?
- Sedimentary rocks
- Modern rocks
- Ignitious rocks
- All of above
Right Answer: Sedimentary rocks
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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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Site for gaseous exchange in respiration system of man is?
A. Bronchioles
B. Bronchi
C. Alveoli
D. All of these
Right Answer: C. Alveoli
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Which can be used as a pollution indicator?
A. Nostoc
B. Anabeana
C. Oscillatoria
D. Both a and b
Right Answer: C. Oscillatoria
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The destruction of all life forms is?
A. Vaccination
B. Chemotherapy
C. Sterilization
D. Immunization
Right Answer: C. Sterilization
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Bacteria are being used as?
A. Bioremediation
B. Biopesticides
C. Both a and b
D. None of these
Right Answer: B. Biopesticides
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The branch of biology which deals with the study of aging is called?
A. Gerotology
B. Demography
C. Teratology
D. All of these
Right Answer: A. Gerotology
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The most fragile of all biome is?
A. Temperature decedious forest
B. Tundra ecosystem
C. Desert ecosystem
D. Grass land ecosystem
Right Answer: B. Tundra ecosystem
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Only one pair of chromosome is present in?
A. Ferns
B. Mosquito
C. Penicillium
D. Sugarcane
Right Answer: C. Penicillium
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During which stage of succession dermatocarpon and permellia develops?
A. Curstose lichen stage
B. Foliage lichen stage
C. Moss stage
D. Herbaceous stage
Right Answer: B. Foliage lichen stage
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The present goal of gerontology is to increase the?
A. Life span
B. Health spam
C. Strength of the individual
D. Both a and b
Right Answer: B. Health spam
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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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Burning sensation in the chest usually associated with the black flush acidic chyme into esophagus is known as?
A. Pyrosis
B. Pylorus
C. Hunger pang
D. None of these
Right Answer: A. Pyrosis
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Organisms having foreign DNA incorporated into their cells are known as?
A. Transgenic organisms
B. Transgenic plant
C. Transgenic animal
D. Genetic Engineering
Right Answer: A. Transgenic organisms
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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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How many number of muscles in human body
A. 650
B. 650 pairs
C. 550
D. 550 pairs
Right Answer: A. 650
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Classification of neurons as sensory motor and realy neurons is?
A. Physiological classification of neurons
B. Anatomical classification of neurons
C. Classification of neurons based upon size
D. None of these
Right Answer: A. Physiological classification of neurons
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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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An activated enzyme consisting of polypeptide chain and a cofactor is known as?
A. Apoenzyme
B. Holoenzyme
C. Co-enzyme
D. Allosteric enzyme
Right Answer: B. Holoenzyme
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Major constituent of birth control pill is?
A. Progesterone
B. LH
C. FSH
D. ICSH
Right Answer: A. Progesterone
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Water enters into the water vascular system through a sieve like plate called?
A. Ostia
B. Maderporite
C. Osculum
D. Both a and b
Right Answer: B. Maderporite
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Armored mammals live only in which country?
A. Africa
B. America
C. Australia
D. New Zealand
Right Answer: B. America
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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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Vitamin “D” deficiency causes?
A. Rickets
B. Osteomalcia
C. Sponydylosis
D. Both a and b
Right Answer: A. Rickets
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Genetic markers in DNA analysis are?
A. Polysomes
B. Plasmids
C. Provirouses
D. Probes
Right Answer: D. Probes
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The crossing over of different varieties of plants or even species is called?
A. Tissue culturing
B. Genetic engineering
C. Hybridization
D. Reproduction
Right Answer: C. Hybridization
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Hormone of adrenal cortex is?
A. Adrenaline
B. Nor epinephrine
C. Androgens
D. None of these
Right Answer: C. Androgens
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Amygdala is part of?
A. Fore brain
B. Mid brain
C. Hind brain
D. None of these
Right Answer: A. Fore brain
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Part of the brain acting as realy station between hindbrain and forebrain is?
A. Limbic system
B. Thalamus
C. Reticular formation
D. Both b and c
Right Answer: C. Reticular formation
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The condition in which individual have small skull is called?
A. Dwarfism
B. Gigantism
C. Microcophaly
D. Cleft palate
Right Answer: C. Microcophaly
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No of ATP produced by one reduced NAD is?
A. 1
B. 2
C. 3
D. 4
Right Answer: C. 3
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Which one reduces the reproductive capacities of microbial cells?
A. Microbicidal effect
B. Microbistatic effect
C. Both a and b
D. None of these
Right Answer: B. Microbistatic effect
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Most of the plasma proteins are synthesized in?
A. Liver
B. Lymph nodes
C. Bone marrow
D. Pancrease
Right Answer: A. Liver
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Biennial and perennial plants are stimulated to flower by exposure to low temperature. This is called?
A. Vernalisatin
B. Moulting
C. Apomixis
D. None of these
Right Answer: A. Vernalisatin
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Spores of Ustilago tritici are called?
A. Ascospores
B. Teliospores
C. Zygospores
D. Soredia
Right Answer: B. Teliospores
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Lamarck was incharge of invertebrate collection at Natural History Museum in?
- Berlin
- Brun
- California
- Paris
Right Answer: Paris
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The colour of bile is?
A. Golden
B. Yellow
C. Green
D. Brown
Right Answer: C. Green
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The basic unit of biological classification is?
A. Orders
B. Families
C. Genera
D. Species
Right Answer: D. Species
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Agro bacterium normally infect the?
A. Animal cells
B. Plant cells
C. Cyanobacteria
D. Both a and b
Right Answer: B. Plant cells
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Which of the following phylum is exclusively marine?
A. Porifer
B. Nematoda
C. Echinodermata
D. Annelida
Right Answer: C. Echinodermata
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The weight of blood in our body is about _________ of our body weight.
A. 1/10th
B. 1/11th
C. 1/12th
D. 1/13th
Right Answer: C. 1/12th
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Parasite causing African sleeping sickness is transmitted by the bite of infected?
A. Insect
B. Mosquito
C. Tsetse fly
D. Both b and c
Right Answer: C. Tsetse fly
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In which of the following waste compounds into the soil are used as chemical weapons against other competing plants?
A. Angiosperms
B. Conifers
C. Bryophytes
D. Both a and b
Right Answer: B. Conifers
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Misuse of streptomycin can cause?
A. Deafness
B. Allergic reaction
C. Discolouration of teeth
D. Miosis
Right Answer: A .Deafness
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Sliding filament model was proposed in?
A. 1954
B. 1955
C. 1956
D. 1957
Right Answer: A. 1954
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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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The center of most unconscious emotional behaviors, such as love hatred hunger, sexual responses and fear is?
A. Cerebrum
B. Limbic system
C. Thalamus
D. Pineal gland
Right Answer: B. Limbic system
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In cockroach digestion of food is completed in?
A. Stomach
B. Ileum
C. Crop
D. Gizzard
Right Answer: A. Stomach
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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 diaphragm present in the mammal helps in?
A. Sound production
B. Leaping
C. Breathing
D. Excretion
Right Answer: C. Breathing
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No of carbon atoms in glucopyranose ring?
A. 4
B. 5
C. 6
D. 7
Right Answer: B. 5
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Nuclic Acids were 1st isolated in?
A. 1795
B. 1870
C. 1822
D. 1882
Right Answer: B. 1870
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Lysosomes are cytoplasmic organelle and are different from others due to their?
A. Physiology
B. Histology
C. Morphology
D. Pathology
Right Answer: C. Morphology
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Hydra has?
A. Vase – like body
B. Leaf – like body
C. Sole – like body
D. Ribbon – like body
Right Answer: A. Vase – like body
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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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The pores through which water enters into spongocoel are known as?
A. Ostia
B. Osculum
C. Both a and b
D. None of these
Right Answer: A. Ostia
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Incorrect statement about population is?
A. Consist of potentially interbreeding organisms
B. All number belongs of same species
C. Located in the same area at same time
D. Consist of all biotic factors of ecosystem
Right Answer: D. Consist of all biotic factors of ecosystem
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What is our principle source of energy?
A. Nuclear energy
B. Geothermal energy
C. Solar energy
D. Tidal energy
Right Answer: C. Solar energy
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Total number of salivary glands in man is?
A. Three
B. Four
C. Five
D. Six
Right Answer: D. Six
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The branch of biology which deals with the abnormal development and their causes is called?
A. Teratology
B. Mammology
C. Ornithology
D. Human biology
Right Answer: A. Teratology
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At the point of junction of the three bones ilium, ischium, pubis a depression is known as?
A. Forrnen triosseum
B. Acetabulum
C. Coracoid
D. Acetabularia
Right Answer: B. Acetabulum
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Surgars are formed during?
A. Light reaction
B. Light dependent reaction
C. Light independent reaction
D. Both a and b
Right Answer: C. Light independent reaction
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Saliva is collected in (cockroach) inside?
A. Salivary gland
B. Salivary receptacle
C. Both a and b
D. None of these
Right Answer: B. Salivary receptacle
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Which of the following hormone is secreted after ovulation?
A. FSH
B. Oestrogen
C. LH
D. Progesterone
Right Answer: D. Progesterone
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Which of the following is not the benefit of cyanobacteria?
A. Nitrogen fixation
B. Release oxygen
C. Pollution indication
D. None of these
Right Answer: D. None of these
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Wings of bat, birds and insects are example of?
A. Divergent evolution
B. Convergent evolution
C. Both a and b
D. None of these
Right Answer: B. Convergent evolution
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Which of the following has open circulatory system?
A. Octopus
B. Tunicates
C. Squid
D. Both a & c
Right Answer: B. Tunicates
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Nasal cavities lined with mucous membrane of?
A. Columnar epithelium
B. Squamous epithelium
C. Ciliated epithelium
D. Epithelium
Right Answer: C. Ciliated epithelium
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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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Who modified five kingdom system of Robert Whittaker?
A. Schwann and Shleiden
B. Watson and Crick
C. Margulis and Schwartz
D. Lynn and Morgan
Right Answer: C. Margulis and Schwartz
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Five kingdom system of Robert Whittaker was modified in?
A. 1866
B. 1937
C. 1969
D. 1988
Right Answer: C. 1969
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. In frog the gaseous exchange through the skin is known as?
A. Pulomonary respiration
B. Cutaneous respiration
C. Buccal respiration
D. All of these
Right Answer: B. Cutaneous respiration
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Because of structural similarity with the substrate competitive inhibitors may be selected by the?
A. Active sites
B. Binding sites
C. Catalyst sites
D. All of these
Right Answer: B. Binding sites
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In 1840.s, staple food of Irish people was?
A. Corn
B. Wheat
C. Rice
D. Potatoes
Right Answer: D. Potatoes
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Proglottids are involved in?
A. Excretion
B. Reproduction
C. Transportation
D. None of these
Right Answer: B. Reproduction
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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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Which of the following colours cause the highest rate of photosynthesis?
A. Blue
B. Orange – Red
C. Green
D. Yellow
Right Answer: A. Blue
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A protein attached with lecithin to form?
A. Glycoprotein
B. Chromo protein
C. Phospho protein
D. Lipoprotein
Right Answer: D. Lipoprotein
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Competition among species will be greatest if they attempt to occupy the same?
A. Habitat
B. Niche
C. Community
D. Ecosystem
Right Answer: B. Niche
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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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Lamarck published his theory of evolution in?
- 1822
- 1812
- 1817
- 1809
Right Answer: 1809
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The technique of recording the electrical activity of the heart is?
A. Electrocardiography
B. Electrocardiogram
C. Electrocardiograph
D. None of these
Right Answer: B. Electrocardiogram
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All of the following are true about algae except?
A. Sex organ unicellular
B. Thallus
C. Zygote is protected
D. Reserve food is starch
Right Answer: D. Zygote is protected
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