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.
| 551. |
BOD measures the amount of |
| A. | bacteria in a given sample of water |
| B. | algae being decomposed in a given sample |
| C. | oxygen bacteria need to decompose organic matter in a given sample |
| D. | oxygen bacteria need to decompose organic matter in a given sample in a fixed period of time |
| Answer» E. | |
| 552. |
Function of streptococcus during milk fermentation is to |
| A. | produce aerobic environment |
| B. | produce anaerobic environment |
| C. | form lactic acid |
| D. | form peptic acid |
| Answer» C. form lactic acid | |
| 553. |
Hydrolysis can not be carried out without |
| A. | water |
| B. | amino acids |
| C. | peptides |
| D. | mitochondria |
| Answer» B. amino acids | |
| 554. |
In tubifax worms, the tolerance range for oxygen |
| A. | is very low |
| B. | is very high |
| C. | is zero |
| D. | is 100% |
| Answer» C. is zero | |
| 555. |
Loss of control of hand and feet occurs due to |
| A. | lead poisoning (Pb) |
| B. | sulfur dioxide (SO₂) |
| C. | nitrogen oxide (NO) |
| D. | carbon dioxide (CO₂) |
| Answer» B. sulfur dioxide (SO₂) | |
| 556. |
Condensation of glucose molecules (C₆H₁₂O₆) results in |
| A. | starch |
| B. | cellulose |
| C. | glycogen |
| D. | glucagon |
| Answer» E. | |
| 557. |
Coal, natural gas and oil are forms of |
| A. | fossil fuels only |
| B. | carbon compounds only |
| C. | nitrogen compounds |
| D. | fossil fuels and carbon compounds |
| Answer» E. | |
| 558. |
Oesophagus is also called as |
| A. | gut |
| B. | gullet |
| C. | cavity |
| D. | duct |
| Answer» C. cavity | |
| 559. |
A solid mass of blood constituent which acts as a barrier in blood vessel is called |
| A. | thrombus |
| B. | embolus |
| C. | imbolus |
| D. | serum |
| Answer» B. embolus | |
| 560. |
Hollow space between xylem is called |
| A. | vessel |
| B. | lumen |
| C. | lignin |
| D. | pits |
| Answer» C. lignin | |
| 561. |
Continuous space between xylem vessel is known as |
| A. | lumen |
| B. | lignin |
| C. | cell wall |
| D. | all of above |
| Answer» B. lignin | |
| 562. |
Diseases caused by virus include |
| A. | AIDS |
| B. | herpes |
| C. | chicken pox |
| D. | all of above |
| Answer» E. | |
| 563. |
Condensation reaction is the reverse of |
| A. | lock and key hypothesis |
| B. | oxidation |
| C. | hydrolysis |
| D. | glycogen formation |
| Answer» D. glycogen formation | |
| 564. |
Oxygen (O₂) and food substances are provided to the heart through |
| A. | pulmonary arch |
| B. | aortic arch |
| C. | coronary arteries |
| D. | subclavian artery |
| Answer» D. subclavian artery | |
| 565. |
A large amount of dilute urine is produced in |
| A. | freshwater bony fish |
| B. | marine bony fish |
| C. | marine boneless fish |
| D. | freshwater boneless fish |
| Answer» B. marine bony fish | |
| 566. |
Order of the natural classification is |
| A. | Class, order, family, genus and stimulus |
| B. | Class, family, order, genus and species |
| C. | Class, phylum, family, genus and species |
| D. | Class, order, family, genus and species |
| Answer» E. | |
| 567. |
Cell wall components donot dissolve in water and instead increase in |
| A. | shape |
| B. | size |
| C. | volume |
| D. | colour |
| Answer» D. colour | |
| 568. |
Volcanic eruptions, biological decay and forest fires releases |
| A. | Carbon monoxide in air |
| B. | carbon dioxide in air |
| C. | sulpher dioxide in air |
| D. | ammonia in air |
| Answer» E. | |
| 569. |
For most types of fresh water organisms, best water has a |
| A. | pH above 8 |
| B. | pH below 8 |
| C. | pH almost 7 |
| D. | pH below 7 |
| Answer» D. pH below 7 | |
| 570. |
Oxygenated blood is supplied to rest of the body through |
| A. | hepatic portal vein |
| B. | dorsal aorta |
| C. | hepatic artery |
| D. | hepatic vein |
| Answer» E. | |
| 571. |
Excretory substances in animals include |
| A. | oxygen |
| B. | water |
| C. | organic foods |
| D. | Energy |
| Answer» C. organic foods | |
| 572. |
Ability of Red Blood Cells (RBCs) to carry oxygen (O₂) is reduced due to |
| A. | salicylic acid in lungs |
| B. | carboxyl acids |
| C. | carbon monoxide |
| D. | distortion in hemoglobin structure |
| Answer» D. distortion in hemoglobin structure | |
| 573. |
All are wrong in case of alveolar walls but, |
| A. | lining of single cells |
| B. | lining of multiple cells |
| C. | lining of palisade cells |
| D. | depend on the age of organism |
| Answer» B. lining of multiple cells | |
| 574. |
According to surveys, most young people smoke in order to |
| A. | overcome jealousy |
| B. | cover for their failures and weaknesses |
| C. | give an impression of adulthood and maturity |
| D. | give an impression of happiness and success |
| Answer» C. give an impression of adulthood and maturity | |
| 575. |
In cirrhosis, damaged liver cells are replaced by |
| A. | toxins like benzoic acid |
| B. | large amount of peptones |
| C. | fibrous tissues |
| D. | fibrous muscles |
| Answer» D. fibrous muscles | |
| 576. |
During night, the fresh water is made more acidic due to |
| A. | onset of photosynthesis |
| B. | caesura of photosynthesis |
| C. | onset of respiration |
| D. | onset of transpiration |
| Answer» C. onset of respiration | |
| 577. |
Function of myoglobin is to |
| A. | prevent swollen joints |
| B. | aid in muscular contraction |
| C. | aid in blood clotting |
| D. | keeps retina intact |
| Answer» C. aid in blood clotting | |
| 578. |
Indiscriminate fishing shall be |
| A. | encouraged |
| B. | discouraged |
| C. | promoted |
| D. | taken to the next level |
| Answer» C. promoted | |
| 579. |
Gastric juices are produced by |
| A. | lumen |
| B. | villi |
| C. | gastric glands in pit |
| D. | by liver |
| Answer» D. by liver | |
| 580. |
Leaves can not perform photosynthesis without |
| A. | upper epidermis |
| B. | lower epidermis |
| C. | mesophyll cells |
| D. | xylem transporting water and minerals |
| Answer» E. | |
| 581. |
Selective reabsorption mainly occurs through |
| A. | water |
| B. | pressure in afferent arteriole |
| C. | renal pelvis |
| D. | osmosis stream |
| Answer» E. | |
| 582. |
Double membranous sac which encloses a human heart is called as |
| A. | Epicardium |
| B. | Myocardium |
| C. | Endocardium |
| D. | Pericardial cavity |
| Answer» E. | |
| 583. |
Capacity to identify foreign invaders and take actions with help of cells to remove that foreign invader with effectiveness, is termed as |
| A. | hypertension |
| B. | thermoregulation |
| C. | homeostasis |
| D. | immunity |
| Answer» E. | |
| 584. |
Afferent lymph vessels are numerous in number, and efferent lymph vessel is |
| A. | single |
| B. | double |
| C. | triple |
| D. | quadro |
| Answer» B. double | |
| 585. |
Outermost covering in plants is known as |
| A. | epithelium |
| B. | mesophyll |
| C. | lignin |
| D. | epidermis |
| Answer» E. | |
| 586. |
At high temperatures, mesophyll cells release a hormone called |
| A. | citric acid |
| B. | maleic acid |
| C. | abscisic acid |
| D. | sulfuric acid |
| Answer» D. sulfuric acid | |
| 587. |
Eutrophication in an ecosystem is a |
| A. | good sign for ecosystem |
| B. | bad sign for ecosystem |
| C. | neutral sign for ecosystem |
| D. | dual-sided sign for ecosystem |
| Answer» C. neutral sign for ecosystem | |
| 588. |
The process of egestion is |
| A. | same as excretion |
| B. | same as defecation |
| C. | removal of metabolic wastes |
| D. | removal of toxic wastes |
| Answer» C. removal of metabolic wastes | |
| 589. |
Cilia can not remove air and dust particles from lungs and trachea due to |
| A. | nicotine |
| B. | carbon monoxide |
| C. | irritants |
| D. | tar |
| Answer» E. | |
| 590. |
If the surrounding light intensity is low, the pupil becomes |
| A. | large |
| B. | contracts |
| C. | upset |
| D. | relaxes |
| Answer» B. contracts | |
| 591. |
Liver cells become damaged due to excess of |
| A. | adrenaline |
| B. | alcohol |
| C. | toxins like benzoic acid |
| D. | salicylic acid |
| Answer» C. toxins like benzoic acid | |
| 592. |
Renal artery forms branches of capillaries called as |
| A. | glottis |
| B. | glomerulus |
| C. | renal capsule |
| D. | nephrons |
| Answer» C. renal capsule | |
| 593. |
Renewable natural resources include |
| A. | air only |
| B. | water only |
| C. | soil |
| D. | air and water |
| Answer» E. | |
| 594. |
Response of passive immunity is |
| A. | slow |
| B. | gradual |
| C. | immediate |
| D. | hard |
| Answer» D. hard | |
| 595. |
Heart of an amphibian has three chambers i.e. |
| A. | 2 ventricles and 1 auricle |
| B. | 2 auricles and 1 ventricle |
| C. | 3 ventriles and no auricle |
| D. | 3 auricles and no ventricle |
| Answer» C. 3 ventriles and no auricle | |
| 596. |
Hemorrhage occurs when walls of arteries become hard and lose their |
| A. | permeability |
| B. | elasticity |
| C. | fluids |
| D. | turgidity |
| Answer» C. fluids | |
| 597. |
Water molecules move rapidly hence possess |
| A. | potential energy |
| B. | chemical energy |
| C. | kinetic energy |
| D. | electrical energy |
| Answer» D. electrical energy | |
| 598. |
Original volume of cell wall is restored after removal of |
| A. | water |
| B. | salts |
| C. | carbondioxide |
| D. | nutrients |
| Answer» B. salts | |
| 599. |
Normal flow of blood is facilitated by muscular activity of |
| A. | digestion |
| B. | breathing |
| C. | excretion |
| D. | pumping of heart |
| Answer» C. excretion | |
| 600. |
A degenerative arterial change which is associated with advancing age is called |
| A. | arteriosclerosis |
| B. | atheroma |
| C. | lipoproteins |
| D. | fructoproteins |
| Answer» B. atheroma | |