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- 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- The one which is not a globular protein 

a. Anti Rh-antibody 

b. Enzyme 

c. Myosin 

d. Haemoglobin 


Answer- Myosin


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- Cellular digestion is associated with which organelle 

a. Mitochondria 

b. Golgi bodies 

c. Plastids 

d. Lysosomes 


Answer- Lysosomes


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- 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- The simplest of oxygen producting photosynthetic organisms are 

a. Algae 

b. Bacteria 

c. Cyanobacteria 

d. Chlamydomonas 


Answer- Cyanobacteria


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- 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- Yeasts reproduce asexually by forming 

a. Asci 

b. Basidia 

c. Both a & b 

d. Buds 


Answer- Buds


Que- The one which can tolerate highest external osmotic pressure 

a. Algae 

b. Amoeba 

c. Fungi 

d. Bacteria 


Answer- Fungi


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

a. Amoebas 

b. Zooflagellates 

c. Ciliates 

d. Apicomplexans 


Answer- Apicomplexans


Que- The cell wall of oomycetes is chiefly composed of 

a. Chitin 

b. Cellulose 

c. Lignin 

d. Proteins 


Answer- Cellulose


Que- One celled green ptotists are included in 

a. Monera 

b. Algae 

c. Slime molds 

d. Plants 


Answer- Algae


Que- Pick the odd one out 

a. Psilophyton 

b. Rhynia 

c. Cooksonia 

d. Psilotum 


Answer- Psilotum


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- Amphoixus is a 

a. Chordate 

b. Protochordate 

c. Lower chordate 

d. All of these 


Answer- All of these


Que- Adult birds normally possess only one functional 

a. Ureter 

b. Ovary 

c. Lung 

d. Testis 


Answer- Ovary


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

a. Chordata 

b. Hydra 

c. Echinodermata 

d. Hemichordata 


Answer- Echinodermata


Que- Which of the following are triploblastic and acoelomate? 

a. Sponges 

b. Annelida 

c. Platyhelminthes 

d. Aves 


Answer- Platyhelminthes


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

a. C55H70O5N4Mg 

b. C55H72O6N4Mg 

c. C55H70O6N4Mg 

d. C55H72O5N4Mg 


Answer- C55H70O6N4Mg


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 food of hydra consists of 

a. Humus 

b. Detritus 

c. Dead microscopic animals 

d. Small crustaceans 


Answer- Small crustaceans


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- 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- The major constituent of blood plasma is 

a. Protein 

b. NaCl 

c. Water 

d. Cholesterol 


Answer- Water


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- Inferior vena cava


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- Scurvy and beri - beri and caused by the deficiency of 

a. Vitamin B and C 

b. Vitamin B and D 

c. Vitamin C and B 

d. Vitamin A and B 


Answer- Vitamin C and B


Que- Kangaroo rat most probably would be found in 

a. Tropical rain forest 

b. Tundra 

c. Grass land 

d. Desert 


Answer- Desert


Que- The greatest diversity of animals in the lake is found in which one of the following zones? 

a. Limmnetic zone 

b. Littoral zone 

c. Profundal zone 

d. None of these 


Answer- Littoral zone


Que- What is the characteristic feature of consumers? 

a. Autotroph 

b. Heterotroph 

c. Parasite 

d. Saprophyte 


Answer- Heterotroph


Que- What percentage of light reaching the earth is used in photosynthesis? 

a. 0.25 

b. 0.1 

c. 0.05 

d. 0.01 


Answer- 0.01


Que- All of the following are involved in nitrification except 

a. Nitrobacter 

b. Nitrosomonas 

c. Rhizohium 

d. All of these 


Answer- Rhizohium


Que- Competition between species will be greatest if they attempt to occupy the same 

a. Ecosystem 

b. Community 

c. Habitat 

d. Niche 


Answer- Niche


Que- In most ecosystems the greatest amount of energy flows through the 

a. Secondary consumers 

b. Herbivores 

c. Carnivores 

d. Decomposers 


Answer- Herbivores


Que- Which of the following relationship is NOT an example of symbiosis? 

a. Rhizobium and leguminous plants 

b. Marchantia sporophyte and gametophyte 

c. Algae and fungi in a lichen 

d. Mycorrhizal fungi and tree roots 


Answer- Marchantia sporophyte and gametophyte


Que- Animals with greatest number of similarities are grouped together in a/an 

a. Phylum 

b. Family 

c. Genus 

d. Order 


Answer- Genus


Que- The one which is present in all aerobic species 

a. Cytohrome c 

b. Cytochrome a 

c. Cytochrome a3 

d. Cytochrome b 


Answer- Cytohrome c


Que- The structure which has been formed or modified from gill pouches in humans is 

a. Gills 

b. Eustachian tube 

c. Middle ear 

d. Lungs 


Answer- Eustachian tube


Que- According to Lamarch evolution occurred as the result of 

a. Natural selection 

b. The theory of recapitulation 

c. Inheritance of acquired characters 

d. Over production 


Answer- Inheritance of acquired characters


Que- The discease in which transmembrane carrier for the chloride ion is not produced is 

a. Hyperchloesterolemia 

b. Cystic fibrosis 

c. Severe combined immunodeficiency syndrome 

d. AIDS 


Answer- Cystic fibrosis


Que- The one which can break open a plasmid ring is 

a. Ligase enzyme 

b. Primase enzyme 

c. Restriction endonuclease 

d. ATP-ase enzyme 


Answer- Ligase enzyme


Que- A genome is 

a. Appearance of an individual 

b. Genetic basis of few characters 

c. Full set of genes of an individual 

d. All of these 


Answer- Full set of genes of an individual


Que- Genes will not be found in gene pairs in the 

a. Muscle cell of worm 

b. Uterine cells of dog 

c. Sperm cells of frog 

d. Guard cells of leaf 


Answer- Sperm cells of frog


Que- The red green colour blindness is sex linked recessive condition in man. A father with normal vision and a color blind mother world expect to produce. 

a. Color blind sons and daughter with normal vision 

b. Sons with normal vision and color blind daughters 

c. Color blind sons colour blind daughters and daughters with normal vision 

d. Sons with normal vision colour blind daughter and daughters with normal vision 


Answer- Color blind sons and daughter with normal vision


Que- Which one of the following stage preceeds mitosis during cell cycle? 

a. G1 phase 

b. S phase 

c. G2 phase 

d. M phase 


Answer- G2 phase


Que- Which one of the following syndrome is the result of meiotic non dysjunction? 

a. Klinefelters syndrome 

b. Turners syndrome 

c. Downs syndrome 

d. All of these 


Answer- All of these


Que- Which one of the following is correct sequence of stages of prophase 1 of meiosis 

a. Diakinesis diplotene pachytene leptotene zygotene 

b. Zygotene leptotene pachytene diplotene diakinesis 

c. Leptotene zygotene pachytene diplotene diakinesis 

d. Pachytene leptotene diplotene zygotene diakinesis 


Answer- Leptotene zygotene pachytene diplotene diakinesis


Que- In humans the number of tetrads formed during mitosis is 

a. 23.0 

b. 46.0 

c. 0.0 

d. 4.0 


Answer- 0.0


Que- The sequence of 3 bases on tRNA which is complementary to condon of mRNA is called 

a. Gene 

b. Anticodon 

c. Code 

d. Codon 


Answer- Anticodon


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


Que- The basic structural unit of a chromosome is 

a. The centromere 

b. Nuceleosome 

c. Telomere 

d. Histone 


Answer- Nuceleosome


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

a. Neurula 

b. Morula 

c. Gastrula 

d. Balastula 


Answer- Balastula


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

a. Photoperiodism 

b. Thermotropism 

c. Vernalisation 

d. Thermoregulation 


Answer- Vernalisation


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- 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- 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 one which is a weed killer 

a. IAA 

b. NAA 

c. 2 4-D 

d. GA 


Answer- 2 4-D


Que- Sleep movements are a type of 

a. Turgor movements 

b. Growth movements 

c. Tactic movements 

d. Paratonic movments 


Answer- Turgor movements


Que- The one that stores calcium 

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- 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 of the following plays the major role in providing support to young herbaceous parts of the plant: 

a. Living cells of epidermis with higher turgor pressure. 

b. Living cells of cortex and pith with higher turgor pressure. 

c. Collenchyma cells 

d. All of these 


Answer- All of these


Que- Higher turgor pressure in a plant cell is maintained by: 

a. Large number of vacoules in a plant cell. 

b. Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane 

c. Higher osmotic pressure of the cell vacuole 

d. both b and c 


Answer- both b and c


Que- Secondary cell wall of sclerenchyma cells is impregnated with 

a. Cellulose. 

b. Peptidoglycan and murein. 

c. Lignin. 

d. Pectin. 


Answer- Lignin.


Que- Among the followings which is the most longest supportive cell? 

a. Tracheids. 

b. Sclereids. 

c. Trachea. 

d. Collenchyma cells 


Answer- Tracheids.


Que- An increrase in plant girth due to activity of _____ is called secondary growth. 

a. Cork cambium 

b. Pith. 

c. Vascular cambium. 

d. Both a and c 


Answer- Both a and c


Que- Vascular Cambium initially appears as actively dividing cells between: 

a. Primary Xylem and secondary xylem. 

b. Primary xylem and secondary phloem. 

c. Primary xylem and primary phloem 

d. Secondary xylem and secondary phloem. 


Answer- Primary xylem and primary phloem


Que- Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of: 

a. Chemotropic movement 

b. Chemotactic movement. 

c. Chemosastic movement 

d. Haptonastic movement. 


Answer- Chemotactic movement.


Que- The place of attachment of leaf with the shoot is called: 

a. Pith. 

b. Pit. 

c. Pulvinus. 

d. Ecdysone. 


Answer- Pulvinus.


Que- Rapid movement of leaves of mimosa on touching is an example of : 

a. Turgor movement 

b. Nastic movement 

c. Tropic movements. 

d. Growth movement 


Answer- Turgor movement


Que- Roots of a plant show 

a. Positive phototropism and negative geotropism. 

b. Negative phototropism and positive geotropism. 

c. Negative tactic movement and positive tropic movement. 

d. Positive geotropism of stem and roots 


Answer- Negative phototropism and positive geotropism.


Que- Epinasty is controlled by 

a. Gibberellins 

b. Abscisins 

c. Auxins 

d. Cytokinins 


Answer- Auxins


Que- Gibberellins is an example of 

a. Growth inhibitor 

b. Growth stimulator 

c. Growth hormone 

d. None of these 


Answer- Growth stimulator


Que- Which of the following animal has a hydrostatic skeleton: 

a. Earthworm. 

b. Round worm. 

c. Tape worm. 

d. Pin worm 


Answer- Earthworm.


Que- In an annelids, the contraction of circular muscle results in: 

a. Lengthening of the body. 

b. Shortening of the body. 

c. Widening of body 

d. Thinning of body 


Answer- Thinning of body


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

a. They are surrounded by single or double pieces of hard skeleton. 

b. Their shell grows as the animal grows. 

c. They have hydrostatic skeleton. 

d. They move by tube feet 


Answer- They move by tube feet


Que- Which one of the following forms the blk of exoskeleton of an arthropod? 

a. Epicuticle. 

b. Procuticle. 

c. Ectocuticle. 

d. None of these 


Answer- Procuticle.


Que- Exoskeleton of a marine snail is composed of 

a. CaPO4 

b. CaCO3 

c. CaSO4 

d. SiO2 


Answer- CaCO3


Que- Which of the following statement about an arthropod exoskeleton is incorrect? 

a. It permits gaseous exchange. 

b. It contains joints, for the same purpose as present in human skeletal system. 

c. It provides muscle attachment. 

d. Like all the other types of exoskeleton, they lack sensation. 


Answer- It contains joints, for the same purpose as present in human skeletal system.


Que- Ecdysone is 

a. An enzyme that digest endocuticle during an arthropodal ecdysis. 

b. A newly formed exoskeleton in authropods 

c. A hormone that regulates moulting in arthropods. 

d. A process that involves moulting. 


Answer- A hormone that regulates moulting in arthropods.


Que- Endoskeleton is secreted by: 

a. Ectoderm. 

b. Endoderm. 

c. Mesoderm. 

d. All of these 


Answer- Mesoderm.


Que- Collagen fibers of bone are hardened by deposition of: 

a. Ca & PO4 

b. CaCO3 

c. CaSO4 

d. SiO2 


Answer- Ca & PO4


Que- Which one of the following is avascular structure? 

a. A compact bone. 

b. A spongy bone. 

c. Cartilage 

d. All of these 


Answer- Cartilage


Que- Which of the following bone is not present in the hind-limb? 

a. Femur 

b. Tibia 

c. Radius 

d. Fibula 


Answer- Radius


Que- How many bones are present in the wrist? 

a. 4 bones 

b. 6 bones 

c. 8 bones 

d. 14 bones 


Answer- 8 bones


Que- Which of the following bones bones are present in the plam of hand? 

a. Carpals 

b. Metacarpals 

c. Phalanges 

d. Metatarsals 


Answer- Metacarpals


Que- How many vertebrae are present in vertebral column of man? 

a. 33 vertebrae 

b. 33 pairs of vertebrae 

c. 25 vertebrae 

d. 31 vertebrae 


Answer- 33 vertebrae


Que- How many vertebrae are present in coccyx? 

a. 7.0 

b. 12.0 

c. 9.0 

d. 4.0 


Answer- 4.0


Que- How many vertebrae are present in the neck or cervical region of man? 

a. 7.0 

b. 12.0 

c. 5.0 

d. 4.0 


Answer- 7.0


Que- How many vertebrae are present in thoracic region? 

a. 7.0 

b. 12.0 

c. 5.0 

d. 4.0 


Answer- 12.0


Que- How many vertebrae are in sacrum? 

a. 7.0 

b. 12.0 

c. 5.0 

d. 4.0 


Answer- 5.0


Que- How many vertebrae are present in lumbar region? 

a. 7.0 

b. 12.0 

c. 5.0 

d. 4.0 


Answer- 5.0


Que- Which of the following bones are present in pectoral girdle? 

a. Clavicle 

b. Scapula 

c. Both of these 

d. None of these 


Answer- Both of these


Que- A joint formed between humerus, radius and ulna is an example of 

a. Immovable joint. 

b. Slightly movable joint. 

c. Freely movable joint. 

d. Fibrous joint 


Answer- Freely movable joint.

Previous Post Next Post