Biology MCQ (Multiple Choice Questions) - SchoolingAxis

Biology MCQ (Multiple Choice Questions)

 Que- Amount of water required to excrete 1gN of Urea is_________? 

a. 1 ml  

b. 50 ml  

c. 100 ml  

d. 150 ml 


Answer- 50 ml


Que- Each ach nephridium of earthworm opens to the exterior by__________? 

a. Nephrostome  

b. Nephridiopore  

c. Flame cell  

d. Anus 


Answer- Nephridiopore


Que- The main nitrogenous waste formed in the body of earthworm is/are___________? 

a. Ammonia  

b. Urea  

c. Uric acid  

d. Trimethylamine oxide 


Answer- Urea


Que- Which of the following excretory structure is associated with gut of the organism? 

a. Protonephridium  

b. Metanephridium  

c. Malpighian tubules  

d. Nephrons 


Answer- Malpighian tubules


Que- Which of the following nephrons play important role in production of concentrated urine? 

a. Crotical  

b. Medullary  

c. Juxtramedullary  

d. None of these 


Answer- Juxtramedullary


Que- Which of the following kidney stones are most common? 

a. Calcium oxalate   

b. Calcium phosphate  

c. Uric acid  

d. All of these 


Answer- Calcium oxalate 


Que- Which of the following treatment will be administered first in a newly diagnosed renal failure patient? 

a. Renal transplant  

b. Peritoneal Dialysis  

c. Lithotripsy  

d. Hemodialysis 


Answer- Hemodialysis


Que- In plants, which of the following is a waste product produced both during photosynthesis and respiration? 

a. CO2  

b. H2O  

c. O2  

d. Both A and B 


Answer- H2O


Que- In animals excess of nitrogen is excreted primarily in form of___________? 

a. Creatinine  

b. Trimethyamine oxide  

c. Pyrimidine  

d. Ammonia 


Answer- Ammonia


Que- Hydra has no specialized excretory system because: 

a. It does not produce waste material  

b. Due to absence of mesoderm  

c. The whole body cells are in contact with water  

d. It has pseudocoelom. 


Answer- The whole body cells are in contact with water


Que- The distal blind end of the malpighian tubules bathes freely in____________? 

a. Digestive tract  

b. Intestines  

c. Haemocoel  

d. Coelom 


Answer- Haemocoel


Que- Which of the following is a sentimentally arranged excretory system? 

a. Protonephridium  

b. Metanephridium  

c. Malpighian tubules  

d. Nephrons 


Answer- Metanephridium


Que- Excessive lactic acid is converted into __________ by liver? 

a. Glucose  

b. Fructose  

c. Sucrose  

d. Glycogen 


Answer- Glycogen


Que- Each human kidney receives _______% of total cardiac out put? 

a. 0.1 

b. 0.2 

c. 0.3 

d. 0.4 


Answer- 0.2


Que- On which of the following site the posterior pituitary hormone acts predominantly? 

a. Proximal convoluted tubule  

b. Descending limb of loop of Henle  

c. Ascending limb of loop of Henle  

d. Collecting tubules 


Answer- Collecting tubules


Que- Animals that produce metabolic heat at low level and also absorb heat from the surroundings are called__________? 

a. Endotherms  

b. Ectotherms  

c. Heterotherms  

d. Homeotherms 


Answer- Heterotherms


Que- Blubber a thick layer of fat is present in___________? 

a. Fresh water mammals  

b. Terrestrial mammals  

c. Marine Mammals  

d. Flying mammals 


Answer- Marine Mammals


Que- Production of pyrogens is a __________ phenomenon? 

a. Protective  

b. Destructive  

c. Constructive  

d. Aggressive 


Answer- Protective


Que- Thermostat of human body is present in__________? 

a. Fore brain  

b. Hind Brain  

c. Thalamus  

d. Hypothalamus 


Answer- Hypothalamus


Que- Which of the following structure in plant's body is called excretophores? 

a. Stem  

b. Leaves  

c. Flowers  

d. Roots 


Answer- Leaves


Que- The characteristic which enable animals to tolerate dehydration is called__________? 

a. Osmoconformation  

b. Osmoregulaton  

c. Anhydrobiosis  

d. Anhydrosis 


Answer- Anhydrobiosis


Que- Which of the following fishes excrete large volume of diluted urine? 

a. Bony Marine fishes  

b. Fresh water fishes  

c. Both depending upon the surrounding water  

d. None of these 


Answer- Fresh water fishes


Que- Rose is an example of____________? 

a. Hydrophytes  

b. Mesophytes  

c. Xerophytes  

d. Halophytes 


Answer- Mesophytes


Que- In a hot summer after noon, if your body's Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of____________? 

a. Positive feed back  

b. Negative feed back  

c. Feed back  

d. Osmoregulation 


Answer- Negative feed back


Que- Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining. 

a. Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment  

b. Trimethyl alanine  

c. Ammonia  

d. Trimethylamine oxide 


Answer- Trimethylamine oxide


Que- Terrestrial animals like kangaroo rat survive even without drinking water since__________? 

a. They don't require water for their metabolic process  

b. They can retain excessive water in their body during raining season.  

c. They feed on carbohydrate rich seeds which can provide them with metabolic water  

d. They are anhydrobiotic organisms 


Answer- They are anhydrobiotic organisms


Que- Aquatic animals excrete nitrogenous waste commonly in the form of_____________? 

a. Ammonia  

b. Urea  

c. Uric acid  

d. Trimethylamine oxide 


Answer- Ammonia


Que- Protonephridia are present in____________? 

a. Round worms  

b. Flateworm  

c. Tape worms  

d. Segmented worms 


Answer- Flateworm


Que- Which of the following constituent is/are maximum in the filtrate that leaves proximal convoluted tubules? 

a. Glucose  

b. Amino acids  

c. Nitrogenous waste  

d. All of these 


Answer- Nitrogenous waste


Que- Which of the following mechanism explains development of anemia in Renal failure? 

a. Failure of bone marrow is accompanied with renal failure.  

b. Destruction of RBC results from accumulated urea in the blood.  

c. Chronicity of the disease is respobsible for anemia  

d. Failure of proper RBC synthesis, due to lack of chemical stimulation. 


Answer- Failure of proper RBC synthesis, due to lack of chemical stimulation.


Que- Which adaptation is acquired by plants of cooler areas to prevent lipid crystal formation in cell membrane? 

a. Change in membrane protein composition.  

b. Change in the solute composition of the cell membrane which prevents crystallization.  

c. Increase in proportion of unsaturated fatty acids.  

d. Development of heat shock proteins. 


Answer- Increase in proportion of unsaturated fatty acids.


Que- Which of the following statement about Homeostasis is incorrect? 

a. There is a definite control system that regulates the homeostatic activities  

b. Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment  

c. Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment  

d. All are correct 


Answer- Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment


Que- Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss? 

a. Hagfish  

b. Fresh water fishes  

c. Bony fishes  

d. None of these 


Answer- Bony fishes


Que- Normal body temperature in mamals like human beings is____________? 

a. 26 – 28°C  

b. 36 – 38°C  

c. 46 – 48°C  

d. 56 – 58°C 


Answer- 36 – 38°C


Que- In osmosis water molecules move from area of _____________ through semipermeable memberane? 

a. Higher solute concentration to lower solute concentration  

b. Lower solute concentration to higher solute concentration  

c. Lower solvent concentration to higher solvent concentration  

d. All of these 


Answer- Lower solute concentration to higher solute concentration


Que- Which of the following is most toxic? 

a. Ammonia  

b. Urea  

c. Uric acid  

d. Trimethylamine oxide 


Answer- Ammonia


Que- In Urea cycle __________ ammonia molecules combine with 1 CO2 molecule to form 1 molecule of urea. 

a. 1.0 

b. 2.0 

c. 3.0 

d. 4.0 


Answer- 2.0


Que- Which of the vascular channels are related to Juxtramedullary nephrous only? 

a. Afferent and efferent arterioles  

b. Peritubualr capillaries  

c. Vasa nervosa  

d. Vasa recta 


Answer- Vasa recta


Que- A stone measuring 0.4 cm, blocking the outlet of renal pelvis resulting in mild to moderate tract obstruction. Which of the following technique will be opted to remove this stone? 

a. Kidney surgery  

b. Burring a hole and removing the stone manually (nephrolithotomy)  

c. Extracorporeal Shock wave lithotripsy  

d. None of these 


Answer- Extracorporeal Shock wave lithotripsy


Que- Bats & humming birds belong to___________? 

a. Endotherms  

b. Ectotherms  

c. Heterotherms  

d. Homeotherms 


Answer- Heterotherms


Que- Thick, waxy & leathery cuticle around leaves is present in___________? 

a. Hydrophytes  

b. Mesophytes  

c. Xerophytes  

d. Halophytes 


Answer- Xerophytes


Que- Which of the following animal excrete nitrogenous waste mainly as uric acid? 

a. Hydra  

b. Planaria.  

c. Humans  

d. Birds. 


Answer- Birds.


Que- Which of the following openings have cilia? 

a. Nephrostome  

b. Nephridiopore  

c. Both of these  

d. None of these 


Answer- Nephrostome


Que- Malphighian tubules absorb waste materials and salts from__________? 

a. Blood  

b. Lymph  

c. Gut  

d. Hemolymph 


Answer- Hemolymph


Que- Which of the following filtrate contains excessive amount of amino acids, glucose, and salts? 

a. Glomerular filtrate  

b. Filtrate passing through ascending limb  

c. Filtrate passing through distal conveluted tubule  

d. Filtrate passing through collecting tubules 


Answer- Glomerular filtrate


Que- Mammalian kidney, under restricted water supply can conserve water by over ________ % reabsorption of glomerular filtrate 

a. 0.805 

b. 0.905 

c. 0.955 

d. 0.995 


Answer- 0.995


Que- The nephridia of earthworm open into the coelom by_________? 

a. Nephrostome  

b. Nephridiopore  

c. Flame cell  

d. Anus 


Answer- Nephrostome


Que- Nephrostome in earthworm opens in____________? 

a. External space  

b. Internal Body cavity  

c. In gut  

d. In Bladder 


Answer- Internal Body cavity


Que- Scolidon or dog fish belong to the group of fishes called__________? 

a. Cartilaginous fishes  

b. Bony fishes  

c. Running fishes  

d. Jawless fishes 


Answer- Cartilaginous fishes


Que- They are considered to be the most primitive and are surely the first of the vertebrates? 

a. Frogs  

b. Reptiles  

c. Amphibinas  

d. Jawless fishes 


Answer- Jawless fishes


Que- Sub- phylum vertebrate is also known as__________? 

a. Pisces  

b. Craniata  

c. Aves  

d. Amphibia 


Answer- Craniata


Que- The phylum chrordata comprise about how many species? 

a. 25000.0 

b. 50000.0 

c. 100000.0 

d. 10,00,000 


Answer- 50000.0


Que- It is stiff rod of special cells surrounded by connecive tissue present in the mid -dorsal region and appears in the embryos of all chordates 

a. Placenta  

b. Notochord  

c. Cranianta  

d. Ligule 


Answer- Notochord


Que- Snails belong to__________? 

a. Cephalopodsxc  

b. Gastropods  

c. Bivalves  

d. Athropods 


Answer- Gastropods


Que- In mouth cavity of many molluscs there is a rasping tongue like structure_________provided with many horny teeth. 

a. Ligule  

b. Radula  

c. Mantle  

d. Muscle 


Answer- Radula


Que- All insects have how many parts of legs? 

a. 4.0 

b. 2.0 

c. 3.0 

d. 6.0 


Answer- 3.0


Que- In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________? 

a. Endodermis  

b. Mesophyll  

c. Chitin  

d. Epidermis 


Answer- Epidermis


Que- In many which phylum the body of an organisms is usually divided in there regions called head, thorax and abdomen? 

a. Arthropods  

b. Chordata  

c. Annelida  

d. Echinodermata 


Answer- Arthropods


Que- In man which organisms cause abscesses on the skin of arms or legs? 

a. Ascaris  

b. Bacteria  

c. Ring worm  

d. Suinea worm 


Answer- Suinea worm


Que- Chitin in cockroach is absent in____________? 

a. Epicuticle  

b. Exocuticle  

c. Endocuticle  

d. All of these 


Answer- Epicuticle


Que- Melanin pigment in cockroach is found in__________? 

a. Epicuticle  

b. Exocuticle  

c. Endocuticle  

d. All of these 


Answer- Exocuticle


Que- The bristles on the body of the cockroach arise from__________? 

a. Epidermis  

b. Trichogen cell  

c. Basement membrane  

d. Malpighian cell 


Answer- Trichogen cell


Que- The wax present on the body of cockroach is secreted: 

a. Mucocytes  

b. Leucocytes  

c. Oenocytes  

d. Granulocytes 


Answer- Oenocytes


Que- Which organisms are sometimes called the ” pastures of the sea”? 

a. Diatoms  

b. Radiolarians  

c. Dinoflagellates  

d. Foraminiferans 


Answer- Diatoms


Que- Diatoms belong to___________? 

a. Chrysophyta  

b. Bacillariophyceae  

c. Xanthophyceae  

d. Both A. and B. 


Answer- Both A. and B.


Que- Which one of the following is representing the group of diatoms? 

a. Pinnularia, Navicula, Cymbella, Melosira  

b. Euglenamorpha, Hedneria , Heteronema, Colacium  

c. Nostoc, Anabaena, Aulosira, Cylindrospermum  

d. Cochlodinium, Gymnodinium, Lenodinium, Peridinium 


Answer- Pinnularia, Navicula, Cymbella, Melosira


Que- Diatoms are found in__________? 

a. Phytoplanktonic population  

b. Freshwater lakes and ponds  

c. Marine environment  

d. All of the above 


Answer- All of the above


Que- Centric discoid form of diatoms is__________? 

a. Diplaneis  

b. Coscinodiscus  

c. Camphyloneiscus  

d. Stephanodis 


Answer- Coscinodiscus


Que- Microfossile often present in petroleum producing formationsare those of__________? 

a. Diatioms  

b. Heliozoans  

c. Radiolarians  

d. Foraminiferans 


Answer- Diatioms


Que- Cell wall is richly impregnated with silica in__________? 

a. Rhodophyta  

b. Phaeophyta  

c. Baciliariophyta  

d. Euglenophyta 


Answer- Baciliariophyta


Que- The cell wall is usually composed of two overlapping halves called epitheca and hypotheca in__________? 

a. Diatoms  

b. Desmids  

c. Pyrrophyta  

d. Chlorophyta 


Answer- Diatoms


Que- Unlike other algae, diatoms do not readily decay due to___________? 

a. Nonliving cells  

b. Siliceous wall  

c. Mucilaginous wall  

d. Water proof cell 


Answer- Siliceous wall


Que- Cell wall is extremely well preserved in fossil specimens in__________? 

a. Diatoms  

b. Dinoflagellates  

c. Slime moulds  

d. None of these 


Answer- Diatoms


Que- Empty diatom cells are called___________? 

a. Raphe  

b. Valves  

c. Frustule  

d. Girdles 


Answer- Frustule


Que- Diatom frustule/ shell is made of_____________? 

a. Silica  

b. Calcium carbonate  

c. Manesium carbonate  

d. Both A. and B. 


Answer- Silica


Que- The chloroplasts of diatoms and chrysophycean algae do not possess____________? 

a. Chloryphyllpigments  

b. Enzymes for photolysis  

c. Defined grana and stroma  

d. Carotenes with chlorophylls 


Answer- Defined grana and stroma


Que- Oil body is found in the cells of___________? 

a. Diatoms  

b. Slime moulds  

c. Chlorophycean forms  

d. None of the these 


Answer- Diatoms


Que- Diatoms stay afloat due to___________? 

a. Flagella  

b. Stored lpids  

c. Pseudopodia  

d. All of these 


Answer- Stored lpids


Que- Diatomaceous earth is used for making __________? 

a. Fertilizers  

b. Weedicides  

c. Insecticides  

d. Fire proof bricks 


Answer- Fire proof bricks


Que- Locomotion in diatoms is carried out with the help of__________? 

a. Valve  

b. Raphe  

c. Pseudopodium  

d. Cilia or flagella 


Answer- Raphe


Que- Golden brown colour of diatoms is due to presence of__________? 

a. Mycoxanthin, mucoxanthin and myxoxanthophylls  

b. Alpha and beta carotenes and myxoxanthin  

c. Fucoxanthin, diatoxanthin, diadinoxanthin  

d. None of the above 


Answer- Fucoxanthin, diatoxanthin, diadinoxanthin


Que- Which of the following is not nocturnal? 

a. Bedbug  

b. Mosquito  

c. Butterfly  

d. Cockroach 


Answer- Butterfly


Que- Which one of these is an insect? 

a. Mite  

b. Spider  

c. Moth  

d. Scorpion 


Answer- Moth


Que- A moth is closely related to_________? 

a. Wasp  

b. Beetle  

c. Cricket  

d. Butterfly 


Answer- Butterfly


Que- Which one of these is a set of useful insects? 

a. Sandfly , butterfly, hoeybee  

b. Sikmoth, honeybee, locust  

c. Honeybee, silkmoth, tsetse fly  

d. Honeybee , lac insect, cochineal insect 


Answer- Honeybee , lac insect, cochineal insect


Que- Which of the following organ is responsible for blood filtration: 

a. Liver  

b. Kidney  

c. Lungs  

d. Heart 


Answer- Kidney


Que- Which of the following organ is responsible for body metabolism? 

a. Kidney  

b. Liver  

c. Lungs  

d. Heart 


Answer- Liver


Que- The part of the brain that connects the two hemispheres of the brain is called____________? 

a. Corpus callosum  

b. Medulla oblongata  

c.  Cerebral cortex  

d.  Cerebellum 


Answer- Corpus callosum


Que- In which phase of cell cycle cell organelles are formed? 

a. S Phase  

b. G1 Phase  

c. G2 Phase  

d. G0 Phase 


Answer- G2 Phase


Que- Vacuoles are fluid filled sacs surrounded by a membrane called__________? 

a. tonoplast  

b. nuclear membrane  

c. cell membrane  

d. cell wall 


Answer- tonoplast


Que- During the process of cell division which of the following divides first? 

a. cytodplasm  

b. vacuoles  

c. mitochondria  

d. nucleus 


Answer- nucleus


Que- Which of the following manufactures carbohydrates by the process of photosynthesis? 

a. chloroplast  

b. chromoplast  

c. leucoplast  

d. All of these 


Answer- chloroplast


Que- which of the following is called protein synthesizing machine? 

a. mitochondria  

b. nucleus  

c. chromosomes  

d. ribosomes 


Answer- ribosomes


Que- Cell wall is the non living , outermost boundary of__________cell? 

a. plant  

b. bacterial  

c. fungal  

d. all the above 


Answer- all the above


Que- The light microscope can make the object_________times bigger? 

a. 10 times  

b. 100 times  

c. 1000 times  

d. 10000 times 


Answer- 1000 times


Que- Which of the following is a selectively permeable membrane? 

a. cell wall  

b. cytoplasm  

c. cell membrane  

d. none of these 


Answer- cell membrane


Que- Splitting of glucose relates to_________? 

a. respiration  

b. photorespiration  

c. glycolysis  

d. pyruvic acid 


Answer- glycolysis


Que- Artherosclerosis is a major condition leading to__________? 

a. heart attack  

b. hypertension  

c. stroke  

d. tumor 


Answer- heart attack


Que- Shrinkage of protoplast due to exosmosis of water is__________? 

a. imbibition  

b. plasmolysis  

c. deplasmolysis  

d. adhesion 


Answer- plasmolysis


Que- The normal pH of human blood is____________? 

a. 6.4 

b. 7.0 

c. 7.4 

d. 7.5 


Answer- 7.4

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