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.
Initially the classification was based on _________ of plants and animals.
A. Physiology
B. Morphology
C. Histology
D. None of these
Right Answer: B. Morphology
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Which type of nephron is specifically instrumental in the production of concentrated urine?
A. Cortical
B. Juxta medullary
C. Both a & b
D. None of these
Right Answer: B. Juxta medullary
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Which of the following statement about the heart of fishes is correct?
A. Oxygenated blood enters and leaves the heart
B. deoxygenated blood enters and leaves the heart
C. Oxygenated blood enters and deoxygenated blood leaves the heart
D. deoxygenated blood enters and oxygenated blood leaves the heart
Right Answer: B. deoxygenated blood enters and leaves the heart
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The oxygen evolved as by – product during photosynthesis is form?
A. Water absorbs by the roots
B. CO2 taken from atmosphere
C. Chlorophyll
D. The sacts absorbed as solution
Right Answer: A. Water absorbs by the roots
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The largest invertibrates animal is?
A. Squid
B. Branchioceranthus
C. Physalia
D. Whale
Right Answer: A. Squid
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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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Which of the pair is correctly matched?
A. Herbivorous: Canines b/w incisors and premolar
B. Omnivorous: Feed on plants only
C. Filter feeders: Whales
D. Detritivores: Feed on plants and animals
Right Answer: C. Filter feeders: Whales
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Which order of classifactory divisions is correct?
A. kingdom, class, genus, family
B. phylum, class, order, genus
C. Species, order, family, phylum
D. Class, kingdom, family, order
Right Answer: B. phylum, class, order, genus
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No of Fatty Acids in Phosphatidic Acid is?
A. 1
B. 2
C. 3
D. 4
Right Answer: B. 2
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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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Our brain cell contain?
A. 65% H2O
B. 89% H2O
C. 20% H2O
D. 85% H2O
Right Answer: D. 85% H2O
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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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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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The specific heat of vaporization of H2O is?
A. 574 Kcal / kg
B. 474 Kcal / kg
C. 374 Kcal / kg
D. None
Right Answer: A. 574 Kcal / kg
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No. of bio elements?
A. 16
B. 6
C. 10
D. 99
Right Answer: A. 16
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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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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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Hyoscyamus niger is a?
A. Shot day plant
B. Long day plant
C. Day-neutral palnt
D. None of these
Right Answer: B. Long day plant
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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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An association between two organisms, which brings benefit two both organisms is?
A. Symbiosis
B. Mutualism
C. Commensalism
D. Parasitism
Right Answer: B. Mutualism
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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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Hyponasty is due to?
A. Gibberellins
B. Auxins
C. Absicisins
D. None of theses
Right Answer: A. Gibberellins
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Fruit wall is called?
A. Integument
B. Tonoplast
C. Pericarp
D. All of these
Right Answer: C. Pericarp
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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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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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Some balance or ratio between growth inhibitors and growth stimulators is involved in?
A. Tropic movements
B. Tactic movements
C. Nastic movements
D. Tropic movements
Right Answer: C. Nastic movements
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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 cell with two nuclei are?
A. Mono nucleate
B. binucleate
C. Polynucleate
D. Anucleate
Right Answer: B. binucleate
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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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Highly convoluted portion of vas deferens is?
A. Epididymis
B. Prostate gland
C. Bulbourrethral gland
D. Ejaculatory duct
Right Answer: A. Epididymis
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Change in frequency of alleles at a locus that occurs by chance is called?
- Genetic equilibrium
- Gene selection
- Deletion
- Genetic drift
Right Answer: Genetic drift
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A tiny hair like trigger, projection outside is known as?
A. Helix
B. Cnidoblasts
C. Cnidocil
D. Crindostyles
Right Answer: C. Cnidocil
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The most common rust fungi is?
A. Puccinia
B. Ustilago
C. Both a and b
D. None of these
Right Answer: A. Puccinia
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The two opposite and two parallel strands of DNA are held together by?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Ester linkage
Right Answer: C. Hydrogen bond
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Organs structurally different but functionally alike are?
A. Homologous
B. Analogous
C. Both a and b
D. None of these
Right Answer: B. Analogous
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The distance between adjacent base pairs of DNA double helix is?
A. 0.34A0
B. 3.4A0
C. 34A0
D. None
Right Answer: A. 0.34A0
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Scattered vascular bundles are present in the stem of?
A. Monocots
B. Dicots
C. Both a and b
D. None of these
Right Answer: A. Monocots
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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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Ecology is mainly concerned with?
A. Organism
B. Population
C. Community
D. All of these
Right Answer: D. All of these
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Which of the following statement is not true about porifera?
A. Sponges lack symmetry
B. Mesenchyme contains amoeboid cells
C. Outer layer is choanoderm
D. Spongocoel is present
Right Answer: C. Outer layer is choanoderm
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The inactive non-conducting wood is called?
A. Sap wood
B. Heart wood
C. Black wood
D. Both a & b
Right Answer: B. Heart wood
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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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The chaetae are absent in?
A. Nereis
B. Stylaria
C. Hirudo
D. All of these
Right Answer: C. Hirudo
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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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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 first cell of Gametophyte generation is?
A. Oospore
B. Spore
C. Zygote
D. Both a and b
Right Answer: B. Spore
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Which one of the following reproduces asexually by “Budding”?
A. Planaria
B. Hydra
C. Amoeba
D.Both b and c
Right Answer: B. Hydra
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Frogs and toads all walk and hope on land due to its strong?
A. Fore limbs
B. Hind limbs
C. Pelvic girdle
D. None of these
Right Answer: B. Hind limbs
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The soft part of the molluscan body has?
A. Exoskeleton
B. Hydrostatic skeleton
C. Endoskeleton
D. No skeleton
Right Answer: B. Hydrostatic skeleton
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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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Outermost extra-embryonic membrane around foetus is?
A. Chorion
B. Amnion
C. Allantios
D. None of these
Right Answer: B. Amnion
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Aphids suck the phloem juices out of the green stems by inserting their delicate?
A. Tubular mouth
B. Stylets
C. Tentacles
D. Mouth
Right Answer: B. Stylets
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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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Which of the following can feed on all trophic levels?
A. Fungi
B. Algae
C. Carnivores
D. All of these
Right Answer: A. Fungi
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Which one live in the bile duct of host?
A. Dugesia
B. Fascoila
C. Taenia
D. Schistosoma
Right Answer: B. Fascoila
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Which of the following hormone is polypeptide in nature?
A. Oxytocin
B. Leuttinizing hormone
C. Erythropoielin
D. Estrogen
Right Answer: A. Oxytocin
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Wrist bones are called?
A. Tarsals
B. Meta tarsals
C. Carpals
D. Tibia
Right Answer: C. Carpals
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The cells that produce new cells for growth and development of plant are?
A. Sclerenchymataous cells
B. Chlorenhymatous cells
C. Parenchymatous cells
D. Meristematic cells
Right Answer: B. Meristematic cells
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Only mucous saliva is secreted by?
A. Parotid glands
B. Submandibular glands
C. Sublingual glands
D. None of these
Right Answer: C. Sublingual glands
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At very high temperature globular structure essential for enzyme activity is lost and the enzyme is said to be?
A. Activated
B. Poisoned
C. Denatured
D. Inhibited
Right Answer: C. Denatured
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Different classification systems recognizes about?
A. 2 – 4 kingdoms
B. 2 – 5 kingdoms
C. 2 – 6 kingdoms
D. None of these
Right Answer: C. 2 – 6 kingdoms
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That association between organisms in which both partners get benefits each other is called?
A. Mutualism
B. Commesalism
C. Competition
D. Predation
Right Answer: A. Mutualism
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Florigen hormone is produced in?
A. Ethylene
B. Methylene
C. Acetic acid
D. Amino acid
Right Answer: A. Ethylene
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The organism used to reduce pollution of heavy metals by bio absorption?
A. Fungi
B. Virus
C. Bacteria
D. Algae
Right Answer: D. Algae
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Classification of algae is largely based on their?
A. Sex organs
B. Pigment composition
C. Habitate
D. All of these
Right Answer: B. Pigment composition
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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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Energy currency of the cell is?
A. ATP
B. FAD
C. NAD
D. NADPH
Right Answer: A. ATP
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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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Genetic drift occurs in a population that is?
A. Mobile
B. Isolated
C. Small in number
D. Have few gene mutations
Right Answer: C. Small in number
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The organic compound needed to make artificial sugar is?
A. Nutrasweet
B. Aspartame
C. Phenylalanine
D. All of these
Right Answer: C. Phenylalanine
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Tracheal tube system open to the exterior through openings called?
A. Palps
B. Polyps
C. Osculum
D. Spiracles
Right Answer: D. Spiracles
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Devonian period belongs to which era?
A. Cainozoic era
B. Palaeozoic era
C. Mesozoic era
D. Proterozoic era
Right Answer: B. Palaeozoic era
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Plant cells that have had cell wall removed are called?
A. Proplasm
B. Protoplast
C. Totipotent
D. Fragile cell
Right Answer: B. Protoplast
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Which of the following is not found in animal cells?
A. Cell Wall
B. Central vacuole
C. Chloroplast
D. All a, b and c
Right Answer: D. All a, b and c
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Spiny ant – eater is?
A. Oviparous
B. Viviparous
C. Ovoviviparous
D. None of these
Right Answer: C. Ovoviviparous
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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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Rasping organ of snail in called?
A. Radula
B. Papillae
C. Both a and b
D. None of these
Right Answer: A. Radula
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The oldest known fossils are?
- Dipnoi
- Bacteria
- Archaeopteryx
- Prokaryotes
Right Answer: Prokaryotes
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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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Oils may contain upto?
A. 4 double bonds
B. Six double bonds
C. 8 double bonds
D. No double bonds
Right Answer: B. Six double bonds
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Which of the following is not present in glomerular filtrate?
A. Glucose
B. Urea
C. Salts
D. Erythrocytes
Right Answer: D. Erythrocytes
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A team of Japanese scientists is working on introducing the C4 photosynthetic pathway into?
A. Corn
B. Wheat
C. Rice
D. Cotton
Right Answer: C. Rice
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Gram positive bacteria stained?
A. Purple
B. Pink
C. Blue
D. Green
Right Answer: A. Purple
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Thinning of ozone layer and global warming are the harmful effects of?
A. Lead compounds
B. Sulphur oxide
C. Carbon monoxide
D. CFC’s
Right Answer: D. CFC’s
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Which of the following bone is included in “Appendicular skeleton”?
A. Clavicle
B. Palatine
C. Coccyx
D. Sternum
Right Answer: A. Clavicle
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Circulatory system is well developed in?
A. Nematoda
B. Annelida
C. Flat worms
D. Porifera
Right Answer: A. Nematoda
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what are the coelenterates?
A. Parasites
B. Saprobes
C. Carnivorous
D. All of these
Right Answer: C. Carnivorous
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Which of the following factor does not affect the gene frequency?
A. Mutation
B. Genetic drift
C. Random mating
D. None of these
Right Answer: C. Random mating
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Which phase of menstrual cycle ends with ovulation?
A. Proliferation phase
B. Secretory phase
C. Menstruation phase
D. None of these
Right Answer: A. Proliferation phase
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Structure comparable to the organs of the body are?
A. Tissues
B. Cells
C. Organelle
D. All of these
Right Answer: C. Organelle
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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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Amount of DNA / Nucleus (in picogram) in chicken Red blood in?
A. 2.3
B. 3.3
C. 2.4
D. 1.3
Right Answer: A. 2.3
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The areas of the lungs in which gas exchange does not takes place is called?
A. Dead space
B. Alveolar dead space
C. Dead air space
D. None of these
Right Answer: A. Dead space
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The basic element of organic compound is?
A. Nitrogen
B. Carbon
C. Hydrogen
D. Both b and c
Right Answer: B. Carbon
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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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Which of the following is not a viral disease?
A. Cowpox
B. Mumps
C. Tetanus
D. Small pox
Right Answer: C. Tetanus
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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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The branch of biology which deals with the study of abnormal developments and their causes is?
A. Gerontology
B. Teratology
C. Palaeonotology
D. None of these
Right Answer: B. Teratology
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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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Nuclic Acids were 1st isolated in?
A. 1795
B. 1870
C. 1822
D. 1882
Right Answer: B. 1870
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