MCQOPTIONS
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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.
| 651. |
Use of chemical fertilizers causes |
| A. | gaseous pollution |
| B. | water pollution |
| C. | air pollution |
| D. | soil pollution |
| Answer» C. air pollution | |
| 652. |
Hair papilla refers to the mass of |
| A. | tissues of cornified layer |
| B. | blood capillaries at the base of hair |
| C. | actively dividing cells of malpighian layer |
| D. | capillaries in the granular layer |
| Answer» C. actively dividing cells of malpighian layer | |
| 653. |
All parts of the Earth where life can be found are called |
| A. | populations |
| B. | ecosystems |
| C. | biosphere |
| D. | communities |
| Answer» D. communities | |
| 654. |
Amount of water (H₂O) in blood is increased due to |
| A. | lesser tissue respiration |
| B. | more protein-rich diet |
| C. | more glucose in blood |
| D. | more water intake |
| Answer» E. | |
| 655. |
Foul smelling gases include |
| A. | Hydrogen Sulfide (H₂S) only |
| B. | Ammonia (NH₃) |
| C. | Carbon dioxide (CO₂) only |
| D. | Hydrogen Sulfide (H₂S) and Ammonia (NH₃) |
| Answer» E. | |
| 656. |
In case of malnutrition, the basic body needs are met through the consumption of stored |
| A. | fats and glucose |
| B. | fats and glycogen |
| C. | starch and cellulose |
| D. | peptones |
| Answer» C. starch and cellulose | |
| 657. |
Submerged algae and plants die due to |
| A. | death of fish on which they feed |
| B. | less water available for them |
| C. | less oxygen in water |
| D. | blockage of sunlight due to profuse growth |
| Answer» E. | |
| 658. |
Due to short distance between the lungs and the heart, the walls of right ventricle are |
| A. | thicker than the left ventricle |
| B. | thinner than the left atrium |
| C. | thicker than the right atrium |
| D. | thinner than the left ventricle |
| Answer» E. | |
| 659. |
Kidneys are responsible for excretion of |
| A. | bile pigments |
| B. | creatinine |
| C. | nitrogenous wastes |
| D. | carbon dioxide |
| Answer» D. carbon dioxide | |
| 660. |
An excellent habitat for bacterial growth is |
| A. | chlorofluorocarbons based products |
| B. | burning of garbage |
| C. | untreated sewage |
| D. | all of above |
| Answer» D. all of above | |
| 661. |
Energy released as heat to the environment |
| A. | returns to the same system |
| B. | returns to the same organisms that produced it |
| C. | is non-cyclical in nature |
| D. | is converted to light |
| Answer» D. is converted to light | |
| 662. |
Cardiac muscles are composed of myfibrils and myofilaments of |
| A. | actin |
| B. | myosin |
| C. | thrylosin |
| D. | embrosin |
| Answer» D. embrosin | |
| 663. |
Over-breathing can be countered through |
| A. | in breath longer than out breath |
| B. | out breath longer than in breath |
| C. | excessive breathing |
| D. | holding breath |
| Answer» C. excessive breathing | |
| 664. |
Process of flow of sap from injured or cut parts of plant with a considerable force is called |
| A. | imbition |
| B. | budding |
| C. | bleeding |
| D. | leaking |
| Answer» D. leaking | |
| 665. |
Energy reserves are normally stored as |
| A. | glycogen |
| B. | simple sugars |
| C. | complex sugars |
| D. | sucrose |
| Answer» B. simple sugars | |
| 666. |
Simple and complex sugars may be called as |
| A. | reducing sugars |
| B. | non-reducing sugars |
| C. | inorganic nutrient |
| D. | Polysaccharides |
| Answer» B. non-reducing sugars | |
| 667. |
Barbiturates are often prescribed for the treatment of |
| A. | Epilepsy |
| B. | Depression |
| C. | Excess hunger |
| D. | all of above |
| Answer» B. Depression | |
| 668. |
Carboxyhemoglobin is of |
| A. | bright red |
| B. | purplish red |
| C. | bright pink |
| D. | dark red |
| Answer» C. bright pink | |
| 669. |
One of the most common essential component of many co-enzymes is |
| A. | vitamin D12 |
| B. | vitamin K |
| C. | vitamin E |
| D. | vitamin B complex |
| Answer» E. | |
| 670. |
Long term effect of alcohol disturbs the |
| A. | nervous system |
| B. | digestive system |
| C. | cardio-vascular system |
| D. | respiratory system |
| Answer» C. cardio-vascular system | |
| 671. |
If the whole of the topsoil is washed down, the erosion is said to be |
| A. | sheet erosion |
| B. | gully erosion |
| C. | shelter wash off |
| D. | wind erosion |
| Answer» B. gully erosion | |
| 672. |
The purpose of this organ is not known in digestion. This organ is |
| A. | intestinal glands |
| B. | lymphatic vessels |
| C. | appendix |
| D. | micro-organisms living in stomach |
| Answer» D. micro-organisms living in stomach | |
| 673. |
The collapse of xylem tissues is prevented through |
| A. | wide lumen |
| B. | narrow lumen |
| C. | lignin deposition |
| D. | presence of pits |
| Answer» D. presence of pits | |
| 674. |
If the generalized formulae of carbohydrates is CₙH₂ₘOₘ, n and m for glucose are |
| A. | n=3 and m=3 respectively |
| B. | n=3 and m=6 respectively |
| C. | n=6 and m=6 respectively |
| D. | n=12 and m=12 respectively |
| Answer» D. n=12 and m=12 respectively | |
| 675. |
In nutrition , detoxication means |
| A. | removal of toxins through egestion |
| B. | removal of toxins through excretion |
| C. | conversion of toxins into harmless substances |
| D. | using toxins to kill pathogenic bacteria |
| Answer» D. using toxins to kill pathogenic bacteria | |
| 676. |
A group of similar individuals that actually or potentially interbreed in nature are called |
| A. | community |
| B. | population |
| C. | groups |
| D. | species |
| Answer» E. | |
| 677. |
A synthesized knowledge of science may have observations which can be qualitative and |
| A. | deductive |
| B. | inductive |
| C. | quantitative |
| D. | exact |
| Answer» D. exact | |
| 678. |
Any theory is considered a good theory if it leads to further hypothesis and is known as |
| A. | productive hypothesis |
| B. | generative hypothesis |
| C. | nil hypothesis |
| D. | multiple hypothesis |
| Answer» B. generative hypothesis | |
| 679. |
A change in evolution give rise to increase in |
| A. | biodiversity |
| B. | population |
| C. | community |
| D. | geological periods |
| Answer» B. population | |
| 680. |
A walnut tree can be saved from attack of aphid biologically by a parasite |
| A. | wasp |
| B. | bee |
| C. | leech |
| D. | lice |
| Answer» B. bee | |
| 681. |
Gene frequency, gene flow, population density, age distribution, over population are attributes of |
| A. | community |
| B. | population |
| C. | groups |
| D. | individuals |
| Answer» C. groups | |
| 682. |
Process of production of identical copies of organisms asexually is |
| A. | tissue culturing |
| B. | vitro-fertilization |
| C. | Cloning |
| D. | transgenic organisms |
| Answer» D. transgenic organisms | |
| 683. |
Stomach is organ of food digestion therefore secretes enzyme which helps in digestion known as |
| A. | bile |
| B. | pancreatic juice |
| C. | gastric juice |
| D. | no enzyme |
| Answer» D. no enzyme | |
| 684. |
Astronauts may utilize useful technique of hydroponic culture in space to |
| A. | grow vegetables |
| B. | sow seeds |
| C. | preserve milk |
| D. | grow fruits |
| Answer» B. sow seeds | |
| 685. |
Approximate number of species that are currently known to scientists are |
| A. | 2,000,000 |
| B. | 2,100,000 |
| C. | 2,500,000 |
| D. | 2,300,000 |
| Answer» D. 2,300,000 | |
| 686. |
A very useful technique which helps in testing a nutrient's essentiality for plantation is |
| A. | nutrition culture technique |
| B. | Hydroponic culture technique |
| C. | hydrophobic culture technique |
| D. | tissue culture technique |
| Answer» C. hydrophobic culture technique | |
| 687. |
All members of a clone are genetically identical until and unless there occurs a |
| A. | transfer |
| B. | fertilization |
| C. | mutation |
| D. | change |
| Answer» D. change | |
| 688. |
Branch of biology in which we study about living organisms, systems or processes in manufacturing and industrial area is called |
| A. | Environmental Biology |
| B. | Human Biology |
| C. | Microbiology |
| D. | Biotechnology |
| Answer» E. | |
| 689. |
Function of roots is to |
| A. | reproduce |
| B. | support |
| C. | store food |
| D. | anchor the plant |
| Answer» E. | |
| 690. |
Elements which occur in a living organism are called |
| A. | Bioelements |
| B. | chemical elements |
| C. | super elements |
| D. | Natural elements |
| Answer» B. chemical elements | |
| 691. |
Pests are destroyed by using living organism is attributed to process of |
| A. | biological control |
| B. | hazards control |
| C. | disease control |
| D. | chemical control |
| Answer» B. hazards control | |
| 692. |
Killer of bacteria of a sick person is an |
| A. | antivirus |
| B. | antifungal |
| C. | antibody |
| D. | antibacterial |
| Answer» E. | |
| 693. |
Lethal disease which spreads via free sexually contact, blood infusions from an infected person, and contaminated syringes is |
| A. | Hepatitis |
| B. | Hay fever |
| C. | Epilepsy |
| D. | AIDS |
| Answer» E. | |
| 694. |
Individuals of different species (animals and plants) that live together in same habitat constitutes a |
| A. | population |
| B. | Community |
| C. | groups |
| D. | individuals |
| Answer» C. groups | |
| 695. |
Any cell or individual of any offspring produced by asexually is termed as a |
| A. | gene |
| B. | offspring |
| C. | tissue |
| D. | clone |
| Answer» E. | |
| 696. |
Hypothesis always requires a tentative explanation of |
| A. | reasoning |
| B. | perception |
| C. | observation |
| D. | result |
| Answer» D. result | |
| 697. |
Pasteurization helps in preserving |
| A. | fruits |
| B. | vegetables |
| C. | meat |
| D. | milk |
| Answer» E. | |
| 698. |
A continuous series of species which are arranged in ancestors to descendant sequence and each descendant has been evolved from ancestor is known as |
| A. | serial linkages |
| B. | phyletic linkages |
| C. | continuous linkages |
| D. | evolutionary linkages |
| Answer» C. continuous linkages | |
| 699. |
Groups of similar cells that are arranged into loose sheets or bundles are called |
| A. | cells |
| B. | tissues |
| C. | organs |
| D. | organelles |
| Answer» C. organs | |
| 700. |
A set of organelles contain |
| A. | mitochondria, Golgi complex and nucleus |
| B. | mitochondria, neutron and DNA |
| C. | mitochondria, glucose and electron |
| D. | nerve, tissue and stomach |
| Answer» B. mitochondria, neutron and DNA | |