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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.
Here we have large collection of Biology Mcqs for all Students and jobs test preparation purpose. These Biology Mcqs will be updated on daily basis and added more multiple choice question about Biology frequently.You can prepare your Biology Subject for different classes like 9th class, 10th class ,11th class 12th class exams, Entry Test like MCAT NTS ,OTS ,PTS ,BTS, GTS, Jobs Test,Recruitment Test like PPSC CSS FPSC SPSC KPPSC and interviews here.
Biology Mcqs Online with Answers for NTS PPSC Entry Test Classes
Biology
Biology Mcqs with Answers Solved.
The place on the chromosomes where spindle fibers are attached during cell division is?
A. Centro mere
B. Chromatin
C. Kinetochore
D. Centrsome
Right Answer: A. Centro mere
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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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Discharge of blood from blood vessels is known as?
A. Myocardial infraction
B. Cerebral infraction
C. Stroke
D. Hemorrhage
Right Answer: D. Hemorrhage
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Which principle part of the food is digested in stomach?
A. Ftas
B. Carbohydrates
C. Proteins
D. All of these
Right Answer: C. Proteins
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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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The most important group of proteins which are biological active?
A. Hormones
B. Antibodies
C. Enzymes
D. All of these
Right Answer: C. Enzymes
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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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A ballon catheter is used to open up a closed coronary artery is known as?
A. Angiography
B. Angioplasty
C. Angiodem
D. Angina pectoris
Right Answer: B. Angioplasty
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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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The chief structural and functional units of the nervous system are?
A. Neuroglia
B. Neurons
C. Schwann cells
D. Both a and b
Right Answer: B. Neurons
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No of layers in cell wall is?
A. 1
B. 2
C. 3
D. 4
Right Answer: C. 3
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Twins produced from a single fertilized egg are known as?
A. Identical
B. Fraternal
C. Both a and b
D. None of these
Right Answer: A. Identical
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Hepatic portal vein is formed by many veins collecting deoxygenated blood from different parts of alimentary canal, pass the blood to?
A. Inferior vana cava
B. Right atrium
C. Liver
D. Kidney
Right Answer: C. Liver
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The word biology has been derived from two ________ words.
A. Greek
B. Latin
C. Arabic
D. French
Right Answer: A. Greek
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Which of the following is not a stop codon?
A. UAA
B. UAG
C. UGA
D. AUG
Right Answer: D. AUG
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Depression on the concave side of kidney is?
A. Pelvis
B. Hilus
C. Ureter
D. Both a & b
Right Answer: B. Hilus
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The disease caused by low calcium level in the blood is?
A. Cramp
B. Tetany
C. Muscles fatigue
D. both a and b
Right Answer: B. Tetany
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Non-Hodgkin’s lymphonma, can be treated by spray of the antigens produced by?
A. Corn
B. Soybean
C. Tobacco
D. Wheat
Right Answer: C. Tobacco
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Which of the following is incorrect about “CALLUS”?
A. Originate from pith
B. Form over the wound
C. Soft parenchymatous tissues
D. Unites the branches during budding & grafting
Right Answer: A. Originate from pith
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The middle layer of stomach is composed of?
A. Connective tissue
B. Mucosa
C. Smooth muscles
D. Longitudinal muscles
Right Answer: C. Smooth muscles
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The recovery from Anorexia nervosa is very slow. It may take?
A. 2 – 3 year
B. 2 – 4 year
C. 2 – 5 year
D. 4 – 5 year
Right Answer: B. 2 – 4 year
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In blue green algae/ cyanobacteria photosynthetic pigments and electron transport chain component are located on?
A. Plasma membrane
B. Cytoplasm
C. Ribosome
D. Thylakoid membrane
Right Answer: D. Thylakoid membrane
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Highly condensed portions of chromatin are called?
A. Euchromatin
B. Heterochromatin
C. Supercoils
D. Both b and c
Right Answer: B. Heterochromatin
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Hoofed grazing animals, such as horses, cattle and sheep are called?
A. Ungulates
B. Rodents
C. Digitigrades
D. None of these
Right Answer: A. Ungulates
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In which phase bacteria divide at exponential rate?
A. Log phase
B. Lag phase
C. Stationary phase
D. Declaiqe phase
Right Answer: A. Log phase
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Most of the cells secretions are?
A. Glycoprotein
B. Glycolipid
C. Lipoprotein
D. None of these
Right Answer: A. Glycoprotein
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Denitrifying bacteria are?
A. Aerobic
B. Anaerobic
C. Microacerophilic
D. Both a and b
Right Answer: B. Anaerobic
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In cockroach partly digested food is stored in the?
A. Stomach
B. Crop
C. Ileum
D. Gizzard
Right Answer: B. Crop
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Which of the following is incorrect about “ERYTHROCYTES”?
A. Once mature do not divide
B. Biconvex and have elastic plasma membrane
C. Formed in red bond marrow
D. All of these
Right Answer: B. Biconvex and have elastic plasma membrane
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In all reptiles the left and right systemic arches carry oxygenated blood and arise from a region of ventricle called?
A. Covum venosum
B. Conus pulmonale
C. Conus venosum
D. Conus pulmonale
Right Answer: A. Covum venosum
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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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A wave of electrochemical changes which travels along the length of the neurons involving chemical reactions and movement of ions across the membrane is called?
A. Membrane potential
B. Saltatory impulse
C. Nerve impulse
D. action potential
Right Answer: C. Nerve impulse
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Number of species of ROSACEAE family reported in Pakistan?
A. 100
B. 213
C. 29
D. 2000
Right Answer: B. 213
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Pelvic and leg bones are useless vestiges in?
A. Whale
B. Snakes
C. Man
D. Both a and b
Right Answer: D. Both a and b
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The feeding stage of Myxomycota is a?
A. Plasmodium
B. Physarum
C. Peritonium
D. None of these
Right Answer: A. Plasmodium
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An enzyme that can be used to treat Lyosome storage disease is?
A. Glukokinase
B. α- Glukokinase
C. β-Galactosidase
D. α- Galactosidase
Right Answer: D. α- Galactosidase
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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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During surgery antithrombin III is used to prevent?
A. Blood loss
B. Blood clotting
C. Blood agglutination
D. Hemolysis
Right Answer: B. Blood clotting
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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 attachment of a larger & smaller subunits of ribosomes is controlled by the presence of?
A. Mn++ ions
B. Fe+2 ions
C. Mg ++ ions
D. Fe+3 ions
Right Answer: C. Mg ++ ions
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Organs of locomotion, parapodia are present in?
A. Polychaeta
B. Oligochaeta
C. Hiridinea
D. All of these
Right Answer: A. Polychaeta
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Spinal nerves included in parasympathetic nervous system arise from the?
A. Upper portion of spinal cord
B. Middle portion of spinal cord
C. Bottom portion of spinal cord
D. None of these
Right Answer: C. Bottom portion of spinal cord
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Cell wall is secreted by _________ of the cell.
A. Organelles
B. Cytoplasm
C. Vacuoles
D. Protoplasm
Right Answer: D. Protoplasm
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A series of hypothesis supported by the results of many tests is then called?
A. Theory
B. Scientific law
C. Constant fact of nature
D. Productive theory
Right Answer: A. Theory
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According to _________ active site is a rigid structure.
A. Induce fit model
B. Lock & key model
C. Fluid musaie model
D. Both and b
Right Answer: B. Lock & key model
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What is the size of smallest virus?
A. 250 nm
B. 250 A
C. 250 μm
D. 250 Pm
Right Answer: A. 250 nm
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What is the diameter of skeletal muscle fiber
A. 10-100 μ m
B. 1-2 μ m
C. 16 nm
D. 7-8 μ m
Right Answer: A. 10-100 μ m
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The volume of the phage is about ________ of the host.
A. 1/10
B. 1/100
C. 1/1000
D. None of these
Right Answer: C. 1/1000
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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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Open growth is found in?
A. Plants
B. Evolved animals
C. Lower animals
D. All of these
Right Answer: A. Plants
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The major cell infected by HIV is?
A. B-lymphocytes
B. T-lymphocytes
C. helper T-lymphocytes
D. Both a and b
Right Answer: C. helper T-lymphocytes
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In flowering plants, one form of parthenogenesis is called?
A. Climateric
B. Vernalisation
C. Apomixis
D. All of these
Right Answer: C. Apomixis
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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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Dandruff in hair is caused by?
A. Bacteria
B. Algae
C. Fungi
D. Cyanobacteria
Right Answer: C. Fungi
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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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An integumented, indehiscent magasporangium is known as?
A. Seed
B. Emryo sac
C. Fruit
D. Ovule
Right Answer: D. Ovule
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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 organs which can least withstand to anoxia?
A. Heart
B. Brain
C. Kidneys
D. Both a and b
Right Answer: D. Both a and b
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How many polar bodies are produced by one primary oocyte in human?
A. 1
B. 2
C. 3
D. 4
Right Answer: C. 3
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The sequence of nucleotides that determines the amino acid sequence of a protein is called a?
A. Codon
B. Anticodon
C. Gene
D. All of these
Right Answer: C. Gene
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All protozoans are?
A. Colonial
B. Unicellular
C. Simple multicellular
D. All of these
Right Answer: B. Unicellular
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The study of human population and things that affected them is called?
A. Gerontology
B. Palaeontology
C. Teratology
D. Demography
Right Answer: D. Demography
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Which of the following is the bacterial disease?
A. Mumps
B. Candidosis
C. T.B
D. Both b and c
Right Answer: C. T.B
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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 one of the following is cranial and paired bone?
A. Maxilla
B. Occipital
C. Temporal
D. Palatine
Right Answer: C. Temporal
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Our blood contains glucose?
A. 8%
B. 0.8%
C. 0.08%
D. 0.008%
Right Answer: C. 0.08%
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Armadillos are the armored mammals that live only in the?
- Africa
- Australia
- Europe
- America
Right Answer: America
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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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The outer flexible covering of ciliates is known as?
A. Cell wall
B. Simple capsule
C. Pellicle
D. Both a and b
Right Answer: C. Pellicle
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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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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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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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The intake of liquid material by plasma membrane is termed as?
A. Endocytosis
B. Phagocytosis
C. Pinocytosis
D. None of these
Right Answer: C. Pinocytosis
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Which of the following is incorrect about “Ethene”?
A. Breaks dormancy of buds
B. Promotes fruit ripening
C. May induced parthenocarpy
D. Promotes flowering in pineapple
Right Answer: C. May induced parthenocarpy
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The study internal state of homeostasis is known as?
A. Pathogenesis
B. Normal health
C. Hypertrophy
D. Infection
Right Answer: B. Normal health
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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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Coconut milk contains the plants hormone?
A. Gibberellins
B. Cytokinins
C. Auxin
D. All of these
Right Answer: B. Cytokinins
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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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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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In man malarial parasite plasmodium reproduces asexually by?
A. Binary fission
B. Multiple fission
C. Regeneration
D. Budding
Right Answer: B. Multiple fission
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The food relationship b/w sharks and remoras is?
A. Mutualism
B. Commensalism
C. Parasitism
D. Predation
Right Answer: B. Commensalism
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Familial hypercholesterolemia patients lack receptors for removing cholesterol from blood on?
A. Acinar cells
B. Hepatocytes
C. Renel epithelium
D. Both a and b
Right Answer: B. Hepatocytes
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Which is not the function of oral cavity?
A. Mastication
B. Digestion
C. Lubrication
D. Deglutition
Right Answer: D. Deglutition
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Common cold is caused by?
A. Adenovirus
B. Rhabdovirus
C. Tubulovirus
D. Polyomavirus
Right Answer: A. Adenovirus
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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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RNA is synthesized by DNA in a process known as?
A. Translation
B. Transcription
C. Transformation
D. Transgenic organism
Right Answer: B. Transcription
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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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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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Spores of Ustilago tritici are called?
A. Ascospores
B. Teliospores
C. Zygospores
D. Soredia
Right Answer: B. Teliospores
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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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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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During Expiration, which one is reduced in chest cavity?
A. Volume
B. Pressure
C. Both a and b
D. None of these
Right Answer: A. Volume
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Ovulation is the liberation of the ovum from ovary into the?
A. Peritoneal cavity
B. Fallopian tube
C. Uterus
D. None of these
Right Answer: B. Fallopian tube
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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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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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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 is not included in bark?
A. Cork
B. Cortex
C. Phloem
D. Vascular cambium
Right Answer: D. Vascular cambium
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Approximate diameter of RBC is?
A. 7µ m
B. 8µ m
C. 9µ m
D. None of these
Right Answer: B. 8µ m
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Discoidal cleavage is observed in?
A. Rodents
B. Birds
C. Pices
D. None of these
Right Answer: B. Birds
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Oldest known vertebrates fossils belong to the class?
- Reptilia
- Amphibia
- Mamalia
- Pisces
Right Answer: Pisces
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