MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1212 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 651. |
Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called__________? |
| A. | Active transport |
| B. | Passive transport |
| C. | Co-transport |
| D. | Counter transport |
| Answer» C. Co-transport | |
| 652. |
Most of the photosynthesis on earth is carried by__________? |
| A. | Kelps |
| B. | Gymnosperms |
| C. | Angiosperms |
| D. | Algae |
| Answer» E. | |
| 653. |
Most of the marine invertebrates are__________? |
| A. | Osmoconformers |
| B. | Osmoregulators |
| C. | Both depend upon the concentration of sea water |
| D. | None of these |
| Answer» B. Osmoregulators | |
| 654. |
Most of the cellular secretions are ________ in nature? |
| A. | Glycolipids |
| B. | Glycoproteins |
| C. | Nucleohistones |
| D. | Proteins |
| Answer» C. Nucleohistones | |
| 655. |
Most dinoflagellates are___________? |
| A. | Unicellular |
| B. | Multicellular |
| C. | Both of these |
| D. | Zooflagellates |
| Answer» B. Multicellular | |
| 656. |
Most cell membranes are composed principally of ? |
| A. | DNA ad protein |
| B. | Protein and Lipids |
| C. | Protein and Chitin |
| D. | Protein and RNA |
| Answer» C. Protein and Chitin | |
| 657. |
Mosses are included in sub-division of ___________? |
| A. | Anthoceropsida |
| B. | Hepaticopsida |
| C. | Bryopsida |
| D. | Lycopsida |
| Answer» D. Lycopsida | |
| 658. |
More water is reabsorbed in blood due to _________ ? |
| A. | More anti-diuretic hormone |
| B. | Lesser anti-diuretic hormone |
| C. | Active functioning of pancreas |
| D. | Inactivity of pituitary gland |
| Answer» B. Lesser anti-diuretic hormone | |
| 659. |
More than ___________ compounds of tar of tobacco smoke are involved to cause cancer? |
| A. | 5 |
| B. | 90 |
| C. | 15 |
| D. | 10 |
| Answer» E. | |
| 660. |
Monocots are characterized by___________? |
| A. | Number of sepals and petals are 2 or multiple of 2 |
| B. | Number of sepals and petals are 3 or multiple of 3 |
| C. | Number of sepals and petals are 4 or multiple of 4 |
| D. | Number of sepals and petals are 5 or multiple of 5 |
| Answer» C. Number of sepals and petals are 4 or multiple of 4 | |
| 661. |
Molecular formula of chlorophyll b is_____________? |
| A. | C55 H10 O4 N6 Mg |
| B. | C55 H70 O6 N5 Mg |
| C. | C55 H71 O6 N4 Mg |
| D. | C55 H70 O6 N4 Mg |
| Answer» C. C55 H71 O6 N4 Mg | |
| 662. |
Molecular formula of chlorophyll ‘a’ molecule is___________? |
| A. | C55H72O5N4Mg |
| B. | C55H70O6N4Mg |
| C. | C50H72O6N4Mg |
| D. | C55H70O5N4Mg |
| Answer» B. C55H70O6N4Mg | |
| 663. |
Mode of transmission of hepatitis A is__________? |
| A. | Serum |
| B. | Faeco-oral |
| C. | Sexual contact |
| D. | All of these |
| Answer» C. Sexual contact | |
| 664. |
Mode of nutrition in penecillium is____________? |
| A. | Saprotrophs |
| B. | Parasitic |
| C. | Predators |
| D. | Mutualistics |
| Answer» B. Parasitic | |
| 665. |
mitochondria in heart muscles are nearly_____________? |
| A. | 400 |
| B. | 375 |
| C. | 350 |
| D. | 325 |
| Answer» D. 325 | |
| 666. |
Mitosis is divided into_____________? |
| A. | Karyokinesis |
| B. | Cytokinesis |
| C. | Interphase |
| D. | Both a & b |
| Answer» E. | |
| 667. |
mitochondria in ear lobe cells are nearly____________? |
| A. | 40 |
| B. | 50 |
| C. | 55 |
| D. | 60 |
| Answer» C. 55 | |
| 668. |
Mild tertian malaria is caused by _______ ? |
| A. | Plasmodium vivax |
| B. | Plasmodium falciparum |
| C. | Plasmodium ovale |
| D. | Plasmodium malariae |
| Answer» B. Plasmodium falciparum | |
| 669. |
Midgut in cockroach is a short narrow tube called____________? |
| A. | Hepatic caeca |
| B. | Gizzard |
| C. | Stomach |
| D. | Rectum |
| Answer» D. Rectum | |
| 670. |
Microspore of a seed plant that contain male gametophyte including the gamete is called_______________? |
| A. | Pollen grain |
| B. | Ovule |
| C. | Microgametophyte |
| D. | Microsporangium |
| Answer» B. Ovule | |
| 671. |
Microscopic gaps between the neuron endings are called__________? |
| A. | Transmitters |
| B. | Synapses |
| C. | Pores |
| D. | Nodes |
| Answer» C. Pores | |
| 672. |
Microfossile often present in petroleum producing formationsare those of__________? |
| A. | Diatioms |
| B. | Heliozoans |
| C. | Radiolarians |
| D. | Foraminiferans |
| Answer» B. Heliozoans | |
| 673. |
Messenger RNA is formed in_________? |
| A. | nucleus |
| B. | chloroplast |
| C. | mitochondria |
| D. | none of these |
| Answer» B. chloroplast | |
| 674. |
Membranes of the grane are sites where? |
| A. | Oxygen is stored |
| B. | Food is stored |
| C. | Sunlight is trapped |
| D. | CO2 is stored. |
| Answer» D. CO2 is stored. | |
| 675. |
Membrane that separates ‘cytoplasm’ and ‘nucleus’ is called ___________ ? |
| A. | Cell wall |
| B. | Cell membrane |
| C. | Boundary |
| D. | Nuclear envelop |
| Answer» E. | |
| 676. |
Members of one species inhabiting the same are form__________? |
| A. | Species |
| B. | Community |
| C. | Ecosystem |
| D. | Population |
| Answer» E. | |
| 677. |
Melanin pigment in cockroach is found in__________? |
| A. | Epicuticle |
| B. | Exocuticle |
| C. | Endocuticle |
| D. | All of these |
| Answer» C. Endocuticle | |
| 678. |
Megaphylls i.e. leaves with divided veins with an expanded lamina is a dharacteristic of ___________________? |
| A. | Lycopods |
| B. | Ferns |
| C. | Seed plants |
| D. | Both b and c |
| Answer» E. | |
| 679. |
Megaphylls are characteristic for____________? |
| A. | Ferns |
| B. | Seed plants |
| C. | Both of these |
| D. | None of these |
| Answer» C. Both of these | |
| 680. |
Maximum speed of nerve impulse transmission is____________? |
| A. | 100 m/sec |
| B. | 110 m/sec |
| C. | 120m/sec |
| D. | 130 m/sec. |
| Answer» D. 130 m/sec. | |
| 681. |
Maximum number of species of living things on earth are___________? |
| A. | Algae |
| B. | Fungi |
| C. | Insects |
| D. | Protozoa |
| Answer» D. Protozoa | |
| 682. |
Mastication is carried out by__________? |
| A. | Teeth |
| B. | Tongue |
| C. | Smooth muscles |
| D. | All of these |
| Answer» B. Tongue | |
| 683. |
Masses of dilated tortuous veins in the anorectal mucosa are known as___________? |
| A. | Bulimia |
| B. | Ulcer |
| C. | Adipose tissue |
| D. | Hemorrhoids |
| Answer» E. | |
| 684. |
Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining. |
| A. | Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment |
| B. | Trimethyl alanine |
| C. | Ammonia |
| D. | Trimethylamine oxide |
| Answer» E. | |
| 685. |
Many bacteria in our digestive system synthesize vitamins for example vitamin_________? |
| A. | B1 |
| B. | B2 |
| C. | B12 |
| D. | B6 |
| Answer» D. B6 | |
| 686. |
Mantle in molluscs is present over____________? |
| A. | Head |
| B. | Ventral muscular foot |
| C. | Dorsal visceral region |
| D. | All of these |
| Answer» D. All of these | |
| 687. |
Mammals became dominant in__________? |
| A. | Proterozoic era |
| B. | Mesozoic era |
| C. | Paleozoic era |
| D. | Cenozoic era |
| Answer» E. | |
| 688. |
Mammalian kidney, under restricted water supply can conserve water by over ________ % reabsorption of glomerular filtrate |
| A. | 80.50% |
| B. | 90.50% |
| C. | 95.50% |
| D. | 99.50% |
| Answer» E. | |
| 689. |
Malphighian tubules absorb waste materials and salts from__________? |
| A. | Blood |
| B. | Lymph |
| C. | Gut |
| D. | Hemolymph |
| Answer» E. | |
| 690. |
Malonic acid is an example of____________? |
| A. | Irreversible inhibitor |
| B. | Reversible inhibitor |
| C. | Competitive inhibitor |
| D. | Non-competitive inhibitor |
| Answer» D. Non-competitive inhibitor | |
| 691. |
Malarial parasite is injected into man as__________? |
| A. | sporozoites |
| B. | merozoites |
| C. | zygote |
| D. | none of these |
| Answer» B. merozoites | |
| 692. |
Malaria is associated with___________? |
| A. | Culex Mosquito |
| B. | Culiesta Mosquito |
| C. | Anopheles Mosquito |
| D. | Culex & Anopheles Mosquito |
| Answer» D. Culex & Anopheles Mosquito | |
| 693. |
Maize is an example of_________________? |
| A. | Monocot |
| B. | Dicot |
| C. | Gymnosperms |
| D. | none of these |
| Answer» B. Dicot | |
| 694. |
Maintenance of normal resting potential via movement of K+ inside the cell and na+ out is a/an ___________ process? |
| A. | Active |
| B. | Passive |
| C. | Diffusional |
| D. | None of these |
| Answer» B. Passive | |
| 695. |
Main blood vessel of arthropods usually: |
| A. | Lies on dorsal side |
| B. | Lies on ventral side |
| C. | Lies on lateral side |
| D. | Is not present |
| Answer» B. Lies on ventral side | |
| 696. |
Magnifying power of electron microscope as compared to eye is____________? |
| A. | 500 X |
| B. | 250000X |
| C. | 500000X |
| D. | 250X |
| Answer» C. 500000X | |
| 697. |
Magnesium is present in which of the following__________________? |
| A. | Cytochromes |
| B. | ATP |
| C. | Chlorophyll |
| D. | Haemoglobin |
| Answer» D. Haemoglobin | |
| 698. |
Lungs are spongy due to the presence of million of___________? |
| A. | Air sacs |
| B. | Alveoli |
| C. | Bronchioles |
| D. | Parabronchi |
| Answer» C. Bronchioles | |
| 699. |
Lungs are covered with double layered thin membranous sac called___________? |
| A. | Disphragm |
| B. | Pleura |
| C. | Pericardium |
| D. | Rib cage |
| Answer» C. Pericardium | |
| 700. |
“lubb” sound is produced due to___________________? |
| A. | Opening of inlet valve |
| B. | Closure of inlet valve |
| C. | Opening of outlet valve |
| D. | Closure of outlet valve |
| Answer» C. Opening of outlet valve | |