MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 903 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
Casein is converted to yogurt because of |
| A. | lactic acid |
| B. | salicylic acid |
| C. | benzoic acid |
| D. | picric acid |
| Answer» B. salicylic acid | |
| 502. |
Food chain and food web is made up of |
| A. | trophic levels |
| B. | ecological niche |
| C. | ecological community |
| D. | community |
| Answer» B. ecological niche | |
| 503. |
Cinchona is used in making of |
| A. | quinine |
| B. | morphine |
| C. | pyrethrum |
| D. | DDT |
| Answer» B. morphine | |
| 504. |
Composition of oxygen (O₂) in inspired air is approx. |
| A. | 0.21 |
| B. | 0.165 |
| C. | 0.78 |
| D. | 0.9 |
| Answer» B. 0.165 | |
| 505. |
Blood from various parts of the body is returned to the |
| A. | right ventricle |
| B. | right atrium |
| C. | left ventricle |
| D. | left atrium |
| Answer» C. left ventricle | |
| 506. |
Rupture of seed coat and germination of seed coat effectively is facilitated by force |
| A. | bleeding |
| B. | grafting |
| C. | water pressure |
| D. | imbition |
| Answer» E. | |
| 507. |
Relaxed period of heart chambers is known as |
| A. | systole |
| B. | diastole |
| C. | ventricular systole |
| D. | atrial diastole |
| Answer» B. diastole | |
| 508. |
Dissolved substances such as minerals, amino acids and sugars are found in |
| A. | Cytoplasm |
| B. | Nucleoplasm |
| C. | Cell sap |
| D. | Protoplasm |
| Answer» D. Protoplasm | |
| 509. |
PH (power of Hydrogen) of about 8 is characteristic of |
| A. | sea water |
| B. | fresh water |
| C. | stagnant water |
| D. | lime water |
| Answer» B. fresh water | |
| 510. |
Smoke and fog combine to form |
| A. | smog |
| B. | fossil |
| C. | acid rains |
| D. | water pollution |
| Answer» B. fossil | |
| 511. |
The term of biotechnology used to describe aquatic and marine applications, is known as |
| A. | blue biotechnology |
| B. | green biotechnology |
| C. | white biotechnology |
| D. | red biotechnology |
| Answer» B. green biotechnology | |
| 512. |
In xylem vessel, the lignin is deposited in the form of |
| A. | bell shape |
| B. | concave |
| C. | bean shaped |
| D. | ring shape |
| Answer» E. | |
| 513. |
Illusions, hallucinations and distorted images are caused by |
| A. | depressant drugs |
| B. | opiates |
| C. | cannabis |
| D. | amphetamines |
| Answer» D. amphetamines | |
| 514. |
Desertification is caused due to |
| A. | overgrazing |
| B. | topsoil is eroded |
| C. | rapid water evaporation from the soil |
| D. | all of above |
| Answer» E. | |
| 515. |
DDT (dichloro-diphenyl-trichloroethane: C₁₄H₉Cl₅) is a form of |
| A. | insecticide |
| B. | herbicide |
| C. | pesticides |
| D. | parasiticides |
| Answer» B. herbicide | |
| 516. |
Internodes of plants growing in light are |
| A. | tall |
| B. | short |
| C. | herbaceous |
| D. | non herbaceous |
| Answer» C. herbaceous | |
| 517. |
Fat-soluble vitamins help in all, but |
| A. | the formation of teeth |
| B. | the formation of bones |
| C. | it increases tooth decay |
| D. | it knock knees |
| Answer» D. it knock knees | |
| 518. |
Bleeding in plants is due to |
| A. | root pressure |
| B. | hydrostatic pressure |
| C. | turgor pressure |
| D. | translocation stream |
| Answer» D. translocation stream | |
| 519. |
Chyle is formed by mixing fats with |
| A. | proteins |
| B. | glucose |
| C. | lymph |
| D. | bile |
| Answer» D. bile | |
| 520. |
Back flow of blood in veins is controlled by |
| A. | bicuspid valves |
| B. | tricuspid valves |
| C. | semi valves |
| D. | semi lunar valves |
| Answer» E. | |
| 521. |
Highly concentrated urine is produced by |
| A. | freshwater bony fish |
| B. | marine bony fish |
| C. | marine boneless fish |
| D. | freshwater boneless fish |
| Answer» C. marine boneless fish | |
| 522. |
In an average human being, heart contracts estimately |
| A. | 3.2 billion times |
| B. | 2.2 billion times |
| C. | 2.5 billion times |
| D. | 5.2 billion times |
| Answer» D. 5.2 billion times | |
| 523. |
If higher temperature persists for a longer periods of time, plant may |
| A. | wilt |
| B. | grow |
| C. | flourish |
| D. | regrow |
| Answer» B. grow | |
| 524. |
Thyroid gland is found in the |
| A. | joints |
| B. | liver |
| C. | pancreas |
| D. | neck |
| Answer» E. | |
| 525. |
Fluid which is transmitted between blood bad interstitial fluid is called |
| A. | vessel |
| B. | thrombus |
| C. | embolus |
| D. | lymph |
| Answer» E. | |
| 526. |
The disease AIDS stands for |
| A. | Acquired Iodine Deficiency Syndrome |
| B. | Acquired Inherited Defective Syndrome |
| C. | Acquired Immune Deficiency Syndrome |
| D. | Acquired Immune Deflated Sensations |
| Answer» D. Acquired Immune Deflated Sensations | |
| 527. |
Physical, mental abnormalities and risks of cancer are increased due to |
| A. | dichlorophenyl trichloroethane (DDT) |
| B. | biochemical oxygen demand (BOD) |
| C. | dioxins |
| D. | greenhouse effect |
| Answer» D. greenhouse effect | |
| 528. |
Prevention of heat is attributed to the rate of |
| A. | digestion |
| B. | reaction |
| C. | heat production |
| D. | heat gained |
| Answer» D. heat gained | |
| 529. |
Problem of water loss from the cells and salt gain is faced by |
| A. | freshwater bony fish |
| B. | marine bony fish |
| C. | marine boneless fish |
| D. | fresh water boneless fish |
| Answer» C. marine boneless fish | |
| 530. |
Glycerol can be formed through digestion of |
| A. | galactose |
| B. | fats |
| C. | glucose |
| D. | sucrose |
| Answer» C. glucose | |
| 531. |
Carbon monoxide (CO) causes |
| A. | numbness of brain |
| B. | secretion of adrenaline |
| C. | weakens the wall of alveoli |
| D. | risk of atherosclerosis |
| Answer» E. | |
| 532. |
First use of biotechnology to convert food source into other form was made by |
| A. | Alexander Fleming |
| B. | Louis Pasteur |
| C. | Charles Darwin |
| D. | Chaim Weizmann |
| Answer» C. Charles Darwin | |
| 533. |
Function of thyroxin is to regulate the |
| A. | breathing rate |
| B. | metabolic rate |
| C. | sweat glands |
| D. | prevention of heat loss |
| Answer» C. sweat glands | |
| 534. |
Pneumatophores are the |
| A. | special spores produced in times of drought |
| B. | special breathing roots |
| C. | thick coverings on the epidermis of leaves and shoots |
| D. | types of stomata helping reduce the rate of transpiration |
| Answer» C. thick coverings on the epidermis of leaves and shoots | |
| 535. |
As waste, aerobic respiration (with O₂) produces |
| A. | carbon dioxide only |
| B. | water only |
| C. | glucose |
| D. | carbon dioxide and water |
| Answer» E. | |
| 536. |
High levels of cholesterol in blood can lead to production of |
| A. | thrombus |
| B. | atheroma |
| C. | lipoproteins |
| D. | heart affecting bacteria |
| Answer» C. lipoproteins | |
| 537. |
Along the trophic level, in a food chain, the insecticide amount |
| A. | decreases at each trophic level |
| B. | increases at each trophic level |
| C. | remains unchanged |
| D. | may increase or decrease depending on consumption |
| Answer» C. remains unchanged | |
| 538. |
Biological decay, forest fires and volcanic eruptions are example of |
| A. | gaseous pollutants |
| B. | water pollutants |
| C. | human-caused pollution |
| D. | soil pollution |
| Answer» B. water pollutants | |
| 539. |
Water potential of a pure water is equal to |
| A. | one |
| B. | zero |
| C. | infinite |
| D. | alpha |
| Answer» C. infinite | |
| 540. |
Development of protoplasm indicates |
| A. | nutrition |
| B. | open systems |
| C. | growth |
| D. | none of others |
| Answer» D. none of others | |
| 541. |
When one gram of carbohydrates (CₙH₂ₘOₘ) completely burnt, the released energy is |
| A. | 12 kilojoules |
| B. | 14kilojoules |
| C. | 16 kilojoules |
| D. | 18 kilojoules |
| Answer» D. 18 kilojoules | |
| 542. |
Diseases like rickets, scurvy and beriberi occur due to the deficiency of |
| A. | amino acids |
| B. | carbohydrates |
| C. | lipids |
| D. | vitamins |
| Answer» E. | |
| 543. |
Lack of ascorbic acid causes |
| A. | tooth decay |
| B. | demineralization of bones |
| C. | calcification of soft tissues |
| D. | poor healing of wounds |
| Answer» E. | |
| 544. |
In ecosystem, Biomass is the |
| A. | total mass of living matter at each trophic level |
| B. | total mass of living things in a biosphere |
| C. | total number of living organisms in a given area |
| D. | total energy transferred to each trophic level |
| Answer» B. total mass of living things in a biosphere | |
| 545. |
Water which enters xylem cells, increase cell's |
| A. | hydrostatic pressure |
| B. | hydraulic pressure |
| C. | water pressure |
| D. | plasmolysis rate |
| Answer» B. hydraulic pressure | |
| 546. |
In western civilization, throembolism may lead to |
| A. | paralysis |
| B. | hemorrhage |
| C. | Death |
| D. | leukemia |
| Answer» D. leukemia | |
| 547. |
Number of chemical compounds from which living organisms are made is |
| A. | 92 |
| B. | 16 |
| C. | 20 |
| D. | 108 |
| Answer» C. 20 | |
| 548. |
Plants and animals which are in danger of extinct if not protected are studied under name |
| A. | enraged species |
| B. | multicellular species |
| C. | endangered species |
| D. | unicellular species |
| Answer» D. unicellular species | |
| 549. |
Today size of a living world is |
| A. | small |
| B. | balanced |
| C. | average |
| D. | enormous |
| Answer» E. | |
| 550. |
Color of dry cobalt chloride (COCl₂) paper is |
| A. | pink |
| B. | buff |
| C. | blue |
| D. | red |
| Answer» D. red | |