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MCQOPTIONS
This section includes 1489 Mcqs, each offering curated multiple-choice questions to sharpen your 8th Class knowledge and support exam preparation. Choose a topic below to get started.
| 1401. |
Ductless glands are also known as; |
| A. | Exocrine glands |
| B. | Endocrine glands |
| C. | Target sites |
| D. | Pubic glands |
| Answer» C. Target sites | |
| 1402. |
Presence of which mineral in water helps in metamorphosis of frog? |
| A. | Potassium |
| B. | Sodium |
| C. | Iodine |
| D. | Iron |
| Answer» D. Iron | |
| 1403. |
Choose the correct option for labelling the given figure. |
| A. | a - vagina, b - uterus, c - fallopian tube, d ? ovary |
| B. | a - uterus, b - ovary, c - fallopian tube, d ? vagina |
| C. | a - fallopian tube, b - ovary, c - vagina, d ? uterus |
| D. | a - fallopian tube, b - ovary, c - uterus, d ? vagina |
| Answer» E. | |
| 1404. |
Male gametes in human beings are: |
| A. | Ovum |
| B. | Sperms |
| C. | Testis |
| D. | Ovaries |
| Answer» C. Testis | |
| 1405. |
Direction: Answer the questions from 5 based on the graph given below. During which of the following stages of growth in height is maximum? |
| A. | At the end of adulthood |
| B. | Before puberty |
| C. | At the beginning of old age |
| D. | At the beginning of adulthood |
| Answer» E. | |
| 1406. |
Which of the following parts secretes testosterone? |
| A. | Tunica albuginea |
| B. | Interstitial cells |
| C. | Germinal epithelium |
| D. | Sertoli cells of testes |
| Answer» E. | |
| 1407. |
A Identify the correct sequence that is followed during the growth of human being? 1. Foetus 2. Zygote 3. Embryo 4. Baby 5. Adult 6. Adolescent 7. Child |
| A. | 2, 3, 1, 4, 7, 6, 5. |
| B. | 2, 1, 3, 4, 7, 5, 6. |
| C. | 3, 2, 1, 4, 6, 7, 5. |
| D. | 1, 3, 2, 4, 7, 6, 5. |
| Answer» B. 2, 1, 3, 4, 7, 5, 6. | |
| 1408. |
Which of the following hormones controls the menstrual cycle, the ovulation process and the development of the uterus in the females? |
| A. | Estrogen |
| B. | Progesterone |
| C. | Testosterone |
| D. | Both (A) and (B) |
| Answer» E. | |
| 1409. |
Which of the following is NOT a secondary sexual characteristic feature of girls? |
| A. | The enlargement of breasts. |
| B. | The deepening of voice. |
| C. | The menstruation begins. |
| D. | The growth of hair at armpit. |
| Answer» C. The menstruation begins. | |
| 1410. |
Which one of the following is a major pollutant which causes air pollution? |
| A. | Sulphur dioxide |
| B. | Nitrogen oxide |
| C. | Carbon monoxide |
| D. | All of these |
| Answer» E. | |
| 1411. |
Which of the following has the highest affinity for hemoglobin present in blood? |
| A. | Nitrogen oxide |
| B. | Carbon monoxide |
| C. | Carbon dioxide |
| D. | Oxygen |
| Answer» C. Carbon dioxide | |
| 1412. |
Increasing concentration of toxic substances in the tissues of organisms at successively higher levels in a food chain is: |
| A. | Eutrophication |
| B. | Bio magnification |
| C. | Global warming |
| D. | Nitrogen fixation |
| Answer» C. Global warming | |
| 1413. |
_____ is added to water to separate the smaller particles from water by making them heavier in the process of loading. |
| A. | Sulphuric acid |
| B. | Alum |
| C. | DDT |
| D. | Chlorine |
| Answer» C. DDT | |
| 1414. |
Air pollutants are harmful to living things. Which of the following is/are their harmful effect(s)?(i) They form acid rain.(ii) They cause breathing problems in humans.(iii) They interfere with photosynthesis in plants.(iv) They result in the depletion of ozone layer. |
| A. | (i) only |
| B. | (i) and (ii) only |
| C. | (i), (ii) and (iii) only |
| D. | (i), (ii), (iii) and (iv) |
| Answer» E. | |
| 1415. |
Select the pair of diseases that are caused by contaminated water. |
| A. | Cholera and typhoid |
| B. | Diarrhoea and common cold |
| C. | Pneumonia and typhoid |
| D. | Malaria and pneumonia |
| Answer» B. Diarrhoea and common cold | |
| 1416. |
What is the outcome of the release of carbon particles and smoke from factories? |
| A. | Increases the rate of respiration in plants. |
| B. | Decreases the rate of photo- synthesis in plants. |
| C. | Increases the absorption of carbon dioxide by plants. |
| D. | Decreases the rate of transpiration in plants. |
| Answer» C. Increases the absorption of carbon dioxide by plants. | |
| 1417. |
Which one of the following is a natural source of pollution? |
| A. | Mining of minerals |
| B. | Volcanic eruption |
| C. | Forest fire |
| D. | Both [b] and [c] |
| Answer» E. | |
| 1418. |
Which of the following gases is primarily responsible for the global warming? |
| A. | Hydrogen dioxide |
| B. | Carbon dioxide |
| C. | Sulphur dioxide |
| D. | Helium |
| Answer» C. Sulphur dioxide | |
| 1419. |
Marble cancer means: |
| A. | Large number of fungus on the marble. |
| B. | Yellowing of marble due to unburnt carbon particles. |
| C. | Smokes filling the marble from adjoining industries. |
| D. | Corrosion of marble due to acid rain. |
| Answer» E. | |
| 1420. |
Kyoto Protocol is an: |
| A. | Agreement among countries to take steps for planting trees. |
| B. | Agreement among countries to take steps to protect wild life. |
| C. | Agreement among countries to take steps to reduce the emission of greenhouse gases. |
| D. | All the above |
| Answer» D. All the above | |
| 1421. |
Acid rain is formed due to contribution of which of the following pair of gases: |
| A. | Methane and Ozone |
| B. | Sulphur dioxide and nitrogen oxides |
| C. | Methane and sulphur dioxide |
| D. | Oxygen and water vapour |
| Answer» C. Methane and sulphur dioxide | |
| 1422. |
Which of the following is responsible for the depletion of ozone layer which protects us from harmful ultraviolet radiations? |
| A. | Nitrogen |
| B. | Oxygen |
| C. | Nitrogen oxide |
| D. | Chlorofluorocarbons |
| Answer» E. | |
| 1423. |
Gas present in air in about 78% by volume is: |
| A. | Oxygen |
| B. | Nitrogen |
| C. | Carbon dioxide |
| D. | Argon |
| Answer» C. Carbon dioxide | |
| 1424. |
Which one of the following statements is correct? Statement 1: Sulphur dioxide gas in the polluted air causes respiratory problems. Statement 2: Sulphur dioxide gas in the polluted air produces acid rain. |
| A. | Statement 1 is correct and statement 2 is incorrect. |
| B. | Statement 2 is correct and statement 1 is incorrect. |
| C. | Both the statements 1 and 2 are correct. |
| D. | Both the statements 1 and 2 are incorrect. |
| Answer» D. Both the statements 1 and 2 are incorrect. | |
| 1425. |
Which of these steps when adopted will contribute towards better waste management? |
| A. | Reduce the amount of waste formed |
| B. | Reuse the waste |
| C. | Recycle the waste |
| D. | All of the above |
| Answer» E. | |
| 1426. |
Which of the following is NOT a feature of potable water? |
| A. | Clean, colourless and odourless |
| B. | Free from bacteria |
| C. | Have excessive sodium, calcium and magnesium |
| D. | Having dissolved oxygen and carbon dioxide |
| Answer» D. Having dissolved oxygen and carbon dioxide | |
| 1427. |
Which one of the following is not considered as a pollutant unless present in excess concentration? |
| A. | Carbon dioxide |
| B. | Carbon monoxide |
| C. | Sulphur dioxide |
| D. | Nitrogen oxide |
| Answer» B. Carbon monoxide | |
| 1428. |
Van Mahotsav is celebrated in India in the month of: |
| A. | December |
| B. | June |
| C. | July |
| D. | August |
| Answer» D. August | |
| 1429. |
____ is a filtration device that remove particles of solids from waste gases using the force of an induced electrostatic charge. |
| A. | Electrolytic Cell |
| B. | Electrostatic precipitator |
| C. | Electrolysis |
| D. | Electric conductor |
| Answer» C. Electrolysis | |
| 1430. |
Which of the following are possible advantages of using bacteria in sewage treatment? (i) Bacteria multiply quickly, thus producing a cheap and abundant source of enzymes. (ii) Only one type of bacteria is required to provide the various enzymes necessary for different kinds of wastes. (iii) Bacteria can break down waste under anaerobic or aerobic condition. |
| A. | (i) only |
| B. | (i) and (iii) only |
| C. | (ii) and (iii) only |
| D. | (i), (ii) and (iii) |
| Answer» C. (ii) and (iii) only | |
| 1431. |
As proved by many studies greenhouse effect is rapidly increasing because of increase in concentration of carbon dioxide. In the given graph the increase in carbon dioxide concentration is shown. What could be X corresponding to it? (i) Rate of photosynthesis in plants(ii) pH of the oceans(iii) Water level of ocean(iv) Average global temperature of Earth |
| A. | (i) and (iii) only |
| B. | (ii) and (iv) only |
| C. | (ii) only |
| D. | (iv) only |
| Answer» D. (iv) only | |
| 1432. |
The events which occur in the water body after it has been polluted by fertilisers are given as follows :(i) Submerged algae perish(ii) Water plants undergo sudden proliferation(iii) Consumers such as fish die(iv) Oxygen levels fall(v) Bacteria act on the increased number of dead organisms.Arrange them in a correct sequence. |
| A. | (ii)\[\to \](i)\[\to \](iii)\[\to \](v)\[\to \](iv) |
| B. | (iii)\[\to \](iv)\[\to \](i)\[\to \](ii)\[\to \](v) |
| C. | (ii)\[\to \](i)\[\to \](v)\[\to \](iv)\[\to \](iii) |
| D. | (i)\[\to \](iv)\[\to \](v)\[\to \](iii)\[\to \](ii) |
| Answer» D. (i)\[\to \](iv)\[\to \](v)\[\to \](iii)\[\to \](ii) | |
| 1433. |
Which of the following applications use catalytic converters? |
| A. | Automobiles |
| B. | Windmills |
| C. | Poultry farms |
| D. | Dairy farms |
| Answer» B. Windmills | |
| 1434. |
The pollution which is caused by poor disposal of solid waste is classified as: |
| A. | Noise pollution |
| B. | Land pollution |
| C. | Air pollution |
| D. | Thermal pollution |
| Answer» C. Air pollution | |
| 1435. |
Incomplete burning of petrol and diesel in vehicles leads to form which gas? |
| A. | Methane |
| B. | Ozone |
| C. | Nitrogen |
| D. | Carbon monoxide |
| Answer» E. | |
| 1436. |
A structure made of glass walls and roof in which the plants that need protection from cold weather are grown is known as: |
| A. | The white house |
| B. | The greenhouse |
| C. | The red house |
| D. | The blue house |
| Answer» C. The red house | |
| 1437. |
Study the given flow chart and identify P, Q and R. |
| A. | P Q R Livestock wastes Styrofoam cup DDT |
| B. | P Q R Garbage BHC Aluminium cans |
| C. | P Q R Sewage sludge DDT Styrofoam cup |
| D. | P Q R Livestock wastes BHC Grocery |
| Answer» B. P Q R Garbage BHC Aluminium cans | |
| 1438. |
Study the given Venn diagram. X is likely to be ________. |
| A. | A group of people smoking cigarettes |
| B. | Youngsters dancing in disco |
| C. | A farmer spraying pesticides near a river |
| D. | Construction work going on at a building site |
| Answer» E. | |
| 1439. |
Given below are the few statements stating the facts about the microorganisms. Which one of the following facts is incorrect? |
| A. | Microorganism are helpful |
| B. | Microorganism are dangerous |
| C. | Microorganism are very small |
| D. | Microorganisms can be seen by the naked eyes |
| Answer» E. | |
| 1440. |
Microorganism is used for the production of medicines and vaccines. Thus, they are the source of antibiotics. The first ever antibiotics was made by Alexander Fleming in 1929. Which one of the following antibiotics was first made by him? |
| A. | Streptomycin |
| B. | Tetracycline |
| C. | Penicillin |
| D. | Erythromycin |
| Answer» D. Erythromycin | |
| 1441. |
Algae have unique features, which differentiate it from the rest of the microorganisms. Like, it is either unicellular or multicellular, it is autotrophic or heterotrophic. A unicellular algae having a glass like cell wall is: |
| A. | Diatoms |
| B. | Blue green algae |
| C. | Prions |
| D. | Chlamydomonas |
| Answer» B. Blue green algae | |
| 1442. |
Fungi reproduces by |
| A. | Fission |
| B. | Fusion |
| C. | Seed formation |
| D. | Spore formation |
| Answer» E. | |
| 1443. |
How many among the following are fungal diseases in plants? Citrus canker, Late blight of potato, Mosaic disease of mustard, Downy mildew of grapes, Leaf curl of cotton, Rust of wheat, Tobacco mosaic disease, Loose smut of wheat, Leaf curl of tomato |
| A. | 6 |
| B. | 7 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 1444. |
Match different organisms in column I with their related characteristics in column II and select the correct option from the codes given below. Column I Column II (a) Entamoeba histolytica (i) A brown alga which is a rich source of iodine (b) Bacteriophage (ii) A protozoan that causes disease in human beings by living in the large intestine of humans (c) Penicillium (iii) A virus which infects a bacterial cell. (d) Fucus (iv) A fungus used to obtain antibiotic. |
| A. | (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i) |
| B. | (a) - (iii), (b) - (ii), (c) - (iv), (d) - (i) |
| C. | (a) - (ii), (b) - (i), (c) - (iii), (d) - (iv) |
| D. | (a) - (iv), (b) - (ii), (c) - (i), (d) - (iii) |
| Answer» B. (a) - (iii), (b) - (ii), (c) - (iv), (d) - (i) | |
| 1445. |
What helps in diffentiating 'Spirogyra' from 'paramoecium'? |
| A. | Mitochondria |
| B. | Golgi bodies |
| C. | Nucleus |
| D. | Plastids |
| Answer» E. | |
| 1446. |
Which of the following statements is true for viruses? |
| A. | Viruses multiply only in living host. |
| B. | Their crystals have a definite shape. |
| C. | Viruses grow and multiply by themselves outside the host. |
| D. | Viruses may be crystallized. |
| Answer» B. Their crystals have a definite shape. | |
| 1447. |
Identify the given microorganism and select the incorrect statement regarding it. |
| A. | It is a saprophyte commonly called as black bread mould. |
| B. | It reproduces by means of spores. |
| C. | It results in the spoilage of food materials. |
| D. | It is a parasitic fungus that causes various diseases in plants, animals and humans. |
| Answer» E. | |
| 1448. |
Which of the following enzymes is secreted by bacteria that can digest cellulose? |
| A. | Amylase |
| B. | Cellulase |
| C. | Lipase |
| D. | Protease |
| Answer» C. Lipase | |
| 1449. |
The property due to which non-metals break on hammering is called: |
| A. | Ductility |
| B. | Malleability |
| C. | Conductivity |
| D. | Brittleness |
| Answer» E. | |
| 1450. |
Which one of the following is a non-metal? |
| A. | Chlorine |
| B. | Hydrogen |
| C. | Copper |
| D. | Both and |
| Answer» E. | |