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.

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