Biology MCQ (Multiple Choice Questions) - SchoolingAxis

Biology MCQ (Multiple Choice Questions)

 Que- Maximum number of species of living things on earth are___________? 

a. Algae  

b. Fungi  

c. Insects  

d. Protozoa 


Answer- Insects


Que- Which statement is true about an aqueous medium________________? 

a. Ionic as well as non ionic substance in aqueous media retains their identity  

b. Enzymes can not perform catalysis reaction in this medium  

c. Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions  

d. It is less favorable media for chemical reactions 


Answer- Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions


Que- Which of the following carbohydrate is tasteless___________? 

a. Monosaccharide  

b. Oligosaccharide  

c. Polysaccharide  

d. None of these 


Answer- Polysaccharide


Que- Which of the statement is not true for compounds like glycoprotein and glycolipids____________? 

a. They are conjugated molecules of carbohydrates  

b. Both have role in the extra cellular matrix of animals and bacterial cell wall  

c. They are components of biological membranes.  

d. Both are produced and secreted by endoplasmic reticulum 


Answer- Both are produced and secreted by endoplasmic reticulum


Que- A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called__________? 

a. Lipid  

b. Carbohydrate  

c. Protein  

d. Carotein 


Answer- Carbohydrate


Que- Specific heat of vaporization of water is_______________? 

a. 574 Kcal/kg  

b. 674 Kcal/kg  

c. 774 Kcal/kg  

d. 874 Kcal/kg 


Answer- 574 Kcal/kg


Que- Cn(H2O)n. is a general formula of_____________? 

a. Monosaccharides  

b. Oligosaccharides  

c. Ploysacharides  

d. Carbohydrates 


Answer- Carbohydrates


Que- Which one are most complex sugar_____________? 

a. Monosaccharides  

b. Oligosaccharides  

c. Polysaccharides  

d. None of these 


Answer- Polysaccharides


Que- Variety among amino acids is produced due to_____________? 

a. NH2 group  

b. COOH group  

c. R group   

d. All of these 


Answer- R group 


Que- Primary structure of proteins determines__________? 

a. Number of polypeptide chains involved  

b. Bending of polypeptide chains  

c. Amino acid sequence  

d. Coiling of polypeptide chains 


Answer- Amino acid sequence


Que- Ribose is an example of___________? 

a. Trioses  

b. Tetroses  

c. Pentose  

d. Hexose 


Answer- Pentose


Que- The one which is not a globular protein__________? 

a. Anti Rh-antibody  

b. Enzyme  

c. Myosin  

d. Haemoglobin 


Answer- Myosin


Que- Starch cellulose and glaycogen yield ___________ on complete hydrolysis? 

a. Maltose  

b. Sucrose  

c. Fructose  

d. Glucose 


Answer- Glucose


Que- ____________% of Glucose normally present in our blood is? 

a. 0.008 

b. 8.0E-4 

c. 0.018 

d. 0.08 


Answer- 8.0E-4


Que- Which of the following carbohydrate can not be hydrolysed__________________? 

a. Monosaccharide  

b. Oligosaccharide  

c. Polysaccharide  

d. None of these 


Answer- Monosaccharide


Que- An enzyme which converts a dipeptide into separate amino acids is an example of__________? 

a. Decarboxylase  

b. Hydrolase  

c. Oxidoreductase  

d. Transferase 


Answer- Hydrolase


Que- Which one is soluble in hot water_____________? 

a. Starch  

b. Glycogen  

c. Amylose  

d. Amylopectin. 


Answer- Amylose


Que- For the synthesis of 10g of glucose ______________ of energy is required? 

a. 717.6 Kcal  

b. 727 Kcal  

c. 737 Kcal  

d. 747 Kcal 


Answer- 717.6 Kcal


Que- Cellular digestion is associated with which organelle__________? 

a. Mitochondria  

b. Golgi bodies  

c. Plastids  

d. Lysosomes 


Answer- Lysosomes


Que- The covalent bond between two monosaccharide subunits is called________________? 

a. Phosphodiester bond  

b. Peptide bond  

c. Glycosidic Bond  

d. Ionic bond 


Answer- Glycosidic Bond


Que- The unicellular organisms ingest large molecules into their cytoplasm from the external environment without previously digesting them. This process is called___________? 

a. Diffusion  

b. Osmosis  

c. Phagocytosis  

d. Plasmolysis 


Answer- Phagocytosis


Que- Which of the following polysaccharide is called animal starch_________________? 

a. Starch  

b. Glycogen  

c. Cellulose  

d. None of these 


Answer- Glycogen


Que- Which one gives blue colour with iodine_______________? 

a. Starch  

b. Glycogen  

c. Cellulose  

d. Polysaccharide 


Answer- Starch


Que- Mycoplasmas have been included in bacteria because: 

a. Do not have a cell wall  

b. Are heterotrophic  

c. Lack membrane bounded organelles  

d. Reproduce by binary fission 


Answer- Lack membrane bounded organelles


Que- Which one is abundant in animals___________? 

a. Starch  

b. Glycogen  

c. Cellulose  

d. None of these 


Answer- Glycogen


Que- The one which can tolerate highest external osmotic pressure is __________? 

a. Algae  

b. Amoeba  

c. Fungi  

d. Bacteria 


Answer- Fungi


Que- The cell wall of oomycetes is chiefly composed of___________? 

a. Chitin  

b. Cellulose  

c. Lignin  

d. Proteins 


Answer- Cellulose


Que- __________ is example of pure form of cellulose? 

a. Silk  

b. Wool  

c. Cotton  

d. Paper 


Answer- Cotton


Que- A compound produced as a result of a chemical reaction of an alcohol with an acid in which water molecule is released is called________________? 

a. Monosaccharide  

b. Fatty acid  

c. Neutral lipid  

d. Nucleic acid 


Answer- Neutral lipid


Que- Lipids are soluble in which of the following_______________? 

a. Water  

b. Ether  

c. All solvents  

d. Not in any of the above 


Answer- Ether


Que- One celled green ptotists are included in___________? 

a. Monera  

b. Algae  

c. Slime molds  

d. Plants 


Answer- Algae


Que- Lipid molecules can store double amount of energy as compared to same amount of carbohydrate because of high number of__________________? 

a. C-C bonds  

b. C-H bonds  

c. C-N bonds  

d. C-O bonds 


Answer- C-H bonds


Que- Fatty acids containing 18 C atoms and a single double bond is____________? 

a. Saturated Fatty acid  

b. Unsaturated fatty acid  

c. Oleic Acid  

d. Plamitic acid 


Answer- Oleic Acid


Que- Pick the odd one out 

a. Psilophyton  

b. Rhynia  

c. Cooksonia  

d. Psilotum 


Answer- Psilotum


Que- Which of the following statement is incorrect5 for fats containing unsaturated fatty acid_____________? 

a. They contain double bond  

b. They are usually solid at room temperature  

c. They are lighter than water  

d. Their specific gravity is less than 1 


Answer- They are usually solid at room temperature


Que- Which one the following fatty acid is more soluble in an organic solvent and has higher melting point____________? 

a. Acetic acid  

b. Butyric acid  

c. Palmitic acid  

d. All have same 


Answer- Palmitic acid


Que- Peptide bond is_____________? 

a. C-N link  

b. C- O lind  

c. N-H link  

d. C-H link 


Answer- C-N link


Que- Animals obtain carbohydrates mainly from___________? 

a. Glucose  

b. Starch  

c. Sucrose  

d. Glycogen 


Answer- Starch


Que- The one which is incorrect pair? 

a. Sori – Indusium  

b. Arthrophytes – Jointed  

c. Dichotomous – Vernation  

d. Lycopods – Ground pries 


Answer- Dichotomous – Vernation


Que- Double fertilization occurs in_________? 

a. All plants  

b. All seed plants  

c. Gymnosperms  

d. Angiosperms 


Answer- Angiosperms


Que- Proteins comprise of ___________% of the total dry weight of a cell? 

a. 0.4 

b. 0.5 

c. 0.6 

d. 0.7 


Answer- 0.5


Que- Adult birds normally possess only one functional____________? 

a. Ureter  

b. Ovary  

c. Lung  

d. Testis 


Answer- Ovary


Que- Chemical component/s less in eukaryotic cell as compared to prokaryotic cell is / are (i) lipids (ii) carbodydrates (iii) proteins (iv) DNA_________________? 

a. i & ii  

b. iii & iv  

c. i ii iii & iv  

d. iv only 


Answer- iv only


Que- Following possess bilateral symmetry as larva and radial symmetry as adult: 

a. Chordata  

b. Hydra  

c. Echinodermata  

d. Hemichordata 


Answer- Echinodermata


Que- Proteins are polymers of___________? 

a. Fatty acids  

b. Isoprenoid units  

c. Amino acids  

d. Nucleotides 


Answer- Amino acids


Que- Which of the following is the empirical formula of chlorophyll b? 

a. C55H70O5N4Mg  

b. C55H72O6N4Mg  

c. C55H70O6N4Mg  

d. C55H72O5N4Mg 


Answer- C55H70O6N4Mg


Que- In Glycin an amino acid R group is replaced by____________? 

a. H  

b. CH3  

c. COOH  

d. C = O 


Answer- H


Que- How many moles of carbon dioxide are produced by complete oxidation of one mole of puruvic acid? 

a. 1.0 

b. 2.0 

c. 3.0 

d. 6.0 


Answer- 3.0


Que- The element in basic structure of proteins which differentiate them from carbohydrates________? 

a. C  

b. S  

c. H  

d. N 


Answer- S


Que- Hunger pangs usually begin ______ after the previous meal. 

a. 2-4 hours  

b. 6-8 hours  

c. 10-12 hours  

d. 12-24 hours 


Answer- 12-24 hours


Que- Total number of amino acids discovered so far in cells and tissues are______________? 

a. 20.0 

b. 25.0 

c. 150.0 

d. 170.0 


Answer- 170.0


Que- The major constituent of blood plasma is___________? 

a. Protein  

b. NaCl  

c. Water  

d. Cholesterol 


Answer- Water


Que- An insulin molecule consists of _________ polypeptide chains? 

a. 1.0 

b. 2.0 

c. 3.0 

d. 4.0 


Answer- 2.0


Que- The windpipe or trachea lies? 

a. Dorsal to oesophagus  

b. Ventral to oesophagus  

c. Lateral to oesophagus  

d. None of these 


Answer- None of these


Que- A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called__________? 

a. Phosphodiester linkage  

b. Glycosidic bond  

c. Peptide bond  

d. Hydrogen bond 


Answer- Peptide bond


Que- Total number of amino acids in a hemoglobin molecule are__________? 

a. 554.0 

b. 564.0 

c. 574.0 

d. 584.0 


Answer- 574.0


Que- Which structure of protein gives information aboutnumber and sequence of amino acids in it_______________? 

a. Primary structure  

b. Secondary structure  

c. Tertiary structure  

d. Quaternary structure 


Answer- Primary structure


Que- Locomotory structures are not found in which of the following group? 

a. Amoebas  

b. Zooflagellates  

c. Ciliates  

d. Apicomplexans 


Answer- Apicomplexans


Que- Hemoglobin molecule exhibits which structural organization of proteins___________? 

a. Primary structure  

b. Secondary structure  

c. Tertiary structure  

d. Quaternary structure 


Answer- Quaternary structure


Que- Yeasts reproduce asexually by forming____________? 

a. Asci  

b. Basidia  

c. Both a & b  

d. Buds 


Answer- Buds


Que- In an aqueous environment the most stable tertiary conformation is that in which _________ amino acids are buried inside the conformation? 

a. Hydrophobic  

b. Hydrophilic  

c. Basic  

d. None of these 


Answer- Hydrophobic


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

a. The pentose sugar in it is Ribose.  

b. It contains Adenine Guanine Thymine and Cytosine  

c. It is present in the nucleoli  

d. It may be folded back on itself to give double helical characteristics. 


Answer- It contains Adenine Guanine Thymine and Cytosine


Que- Protein coasts of viruses are synthesized in____________? 

a. Lytic cycle  

b. Lysogenic cycle  

c. Both a & b  

d. All of these 


Answer- Lytic cycle


Que- Each turn of DNA contain ____________ nitrogenous base pairs? 

a. 5.0 

b. 10.0 

c. 20.0 

d. 25.0 


Answer- 10.0


Que- Membranes of the grane are sites where? 

a. Oxygen is stored  

b. Food is stored  

c. Sunlight is trapped  

d. CO2 is stored. 


Answer- Sunlight is trapped


Que- Antibodies play important role against microorganisms and other pathogens to which type of proteins do they belong________? 

a. Globular proteins  

b. Fibrous Proteins  

c. Both a and b  

d. None of these 


Answer- Globular proteins


Que- The simplest of oxygen producting photosynthetic organisms are____________? 

a. Algae  

b. Bacteria  

c. Cyanobacteria  

d. Chlamydomonas 


Answer- Cyanobacteria


Que- Amphoixus is a__________? 

a. Chordate  

b. Protochordate  

c. Lower chordate  

d. All of these 


Answer- All of these


Que- Which structural organization is most common in globular proteins____________? 

a. Primary  

b. Secondary  

c. Tertiary  

d. Quaternary 


Answer- Tertiary


Que- Which of the following does not show quaternary structure____________? 

a. Haemoglobin  

b. Pepsin  

c. Fibrin  

d. Insulin 


Answer- Fibrin


Que- Which of the following occurs in anaerobic respiration but not in aerobic respiration? 

a. Release of CO2  

b. Reduction of NAD  

c. Formation of ATP  

d. Production of ethanol from acetaldehyde 


Answer- Production of ethanol from acetaldehyde


Que- helical structure is kept by the formation of _________ bonds among amino acids molecules? 

a. H bonds  

b. Disulphide Bond  

c. Ionic bond  

d. Hydrophobic bonds 


Answer- H bonds


Que- Which of the following are triploblastic and acoelomate? 

a. Sponges  

b. Annelida  

c. Platyhelminthes  

d. Aves 


Answer- Platyhelminthes


Que- The food of hydra consists of___________? 

a. Humus  

b. Detritus  

c. Dead microscopic animals  

d. Small crustaceans 


Answer- Small crustaceans


Que- Actin and myosin are the basic proteins involved in contractile machinery of our body to which type of proteins do they belong____________? 

a. Globular proteins  

b. Fibrous Proteins  

c. Both a and b  

d. None of these 


Answer- Fibrous Proteins


Que- If a plasmolysed plant cell is placed in water the cell will___________? 

a. Burst  

b. Be Killed  

c. Be deplasmolysed  

d. Show no change in it 


Answer- Be deplasmolysed


Que- ATP is a an important molecule for its major function___________? 

a. As an energy currency of the cell  

b. As a coenzyme  

c. Both a and b  

d. None of these 


Answer- As an energy currency of the cell


Que- The first organism of whose genome was completely discovered was____________? 

a. Human beings  

b. Influenza Virus  

c. Hemophilus Influenza  

d. None of these 


Answer- Hemophilus Influenza


Que- All of the following veins carry deoxygenated blood except 

a. Superior vena cava  

b. Inferior vena cava  

c. Hepatic vein  

d. Pulmonary vein 


Answer- Pulmonary vein


Que- Animals fats are ______________ atroom temperature? 

a. Liquids  

b. Gases  

c. Solids  

d. None of these 


Answer- Solids


Que- Sebum produced from sebaceous glands in a mammal helps in___________? 

a. Protection against micro organisms  

b. Temperature regulation  

c. Excretion  

d. All of these 


Answer- Protection against micro organisms


Que- Which one is not found in fatty acids in acylglycerols____________? 

a. C-6  

b. C-25  

c. C-26  

d. C-30 


Answer- C-25


Que- The one that stores calcium is __________? 

a. Sarcolemma  

b. Sarcoplasm  

c. Sarcoplasmic reticulum  

d. Cytosol 


Answer- Sarcoplasmic reticulum


Que- Which one of the following is most likely to occur in an animal during winter? 

a. Activation of sweat glands  

b. Dilation of skin blood vessels  

c. Panting  

d. Thermogenesis 


Answer- Thermogenesis


Que- In esterification OH comes from_______________? 

a. Organic acid  

b. Alcohol  

c. Water  

d. Sugar 


Answer- Alcohol


Que- How many carbon atoms are required to form a furan ring (ribofuranose)_____________? 

a. 3.0 

b. 4.0 

c. 5.0 

d. 2.0 


Answer- 4.0


Que- Sleep movements are a type of___________? 

a. Turgor movements  

b. Growth movements  

c. Tactic movements  

d. Paratonic movments 


Answer- Turgor movements


Que- Keto group is represented as___________? 

a. CO  

b. C-COO-C  

c. HCOH  

d. HOH 


Answer- CO


Que- The type of learning in which there is loss or decrease in response to repeated stimuli? 

a. Imprinting  

b. Habituation  

c. Latent learning  

d. Insight learning 


Answer- Habituation


Que- Glycolipids and glycoproteins have structural role in the ______________ matrix of animal and bacterial cell? 

a. Extracellular  

b. Intracellular  

c. Both of these  

d. Glucose 


Answer- Extracellular


Que- The cells present in testes and secrete testosterone are___________? 

a. Sertoli cells  

b. Germinal cell  

c. Interstitial cells  

d. Spermatocyte 


Answer- Interstitial cells


Que- In Cx(H2O)y x ranges from______________? 

a. 1 to 3 thousand  

b. 3 to many thousand  

c. 3 to 5 thousand  

d. 5 to 9 thousand 


Answer- 3 to many thousand


Que- Exposure to low temperature stimulates plants to flower. This is called___________? 

a. Photoperiodism  

b. Thermotropism  

c. Vernalisation  

d. Thermoregulation 


Answer- Vernalisation


Que- The basic structural unit of a chromosome is____________? 

a. The centromere  

b. Nuceleosome  

c. Telomere  

d. Histone 


Answer- Nuceleosome


Que- In living organisms the lubricant which provides protection against damage resulting from friction is___________? 

a. Carbohydrates  

b. Fatty acid  

c. Water  

d. Protein 


Answer- Water


Que- The first stage of development in which a cavity appears is the__________? 

a. Neurula  

b. Morula  

c. Gastrula  

d. Balastula 


Answer- Balastula


Que- The trioses which are intermediate in respiration and photosynthesis are_______________? 

a. Glyceraldehydes  

b. Dihydroxy acetone  

c. Both of these  

d. None of these 


Answer- Both of these


Que- The one which causes contraction of wall of the uterus during and after birth? 

a. ADH  

b. MSH  

c. Oxytocin  

d. Progesterone 


Answer- Oxytocin


Que- The monosaccharide found in some bacteria and occurring rarely are______________? 

a. Trioses  

b. Hexoses  

c. Tetroses  

d. Pentoses 


Answer- Tetroses


Que- Which statement correctly describes the transcription of DNA? 

a. It produces another DNA molecule  

b. It produces mRNA  

c. It is a semi conservation process  

d. It occurs at surface of ribosomes 


Answer- It produces mRNA

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