MCQOPTIONS
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MCQOPTIONS
This section includes 1275 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Germ theory of disease has________________postulates? |
| A. | 3 |
| B. | 5 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 552. |
Who developed the vaccine against anthrax? |
| A. | Louis Pasteur |
| B. | Edward Jennar |
| C. | Leuvenhoek |
| D. | Alexander Fleming |
| Answer» B. Edward Jennar | |
| 553. |
In bacterial categories the bacteria smaller in number are_______________? |
| A. | Gram-ive bacteria |
| B. | Eubacteria |
| C. | Ancient bacteria |
| D. | Gram +ive bacteria |
| Answer» D. Gram +ive bacteria | |
| 554. |
Which of the following contains genes for drug and disease resistance in bacteria? |
| A. | Necleotide |
| B. | Plasmid |
| C. | Mesosome |
| D. | Ribosome |
| Answer» C. Mesosome | |
| 555. |
Most of the photosynthesis on earth is carried by__________? |
| A. | Kelps |
| B. | Gymnosperms |
| C. | Angiosperms |
| D. | Algae |
| Answer» E. | |
| 556. |
Flagella originate from_______________? |
| A. | Cell membrane |
| B. | Cell wall |
| C. | Capsule |
| D. | Basal body |
| Answer» E. | |
| 557. |
Chalk is gradually formed of dead______________? |
| A. | Actinopods |
| B. | Foraminiferans |
| C. | Apicomplexans |
| D. | Radiolarians |
| Answer» C. Apicomplexans | |
| 558. |
Which of the following statement is incorrect about algae______________? |
| A. | Their zygote unlike plants is protected by parental tissue |
| B. | Their classification is based on pigment composition |
| C. | Most of them have different morphological forms in-different stages of their life cycle |
| D. | Almost all of them are aquatic |
| Answer» B. Their classification is based on pigment composition | |
| 559. |
Of the following which one has glassy shells________________? |
| A. | Radiolarians |
| B. | Forams |
| C. | Both of these |
| D. | None of these |
| Answer» B. Forams | |
| 560. |
Type of lichen which tightly attaches to rocks is_____________? |
| A. | Parmelia |
| B. | Fruticose |
| C. | Foliose |
| D. | Crustose |
| Answer» E. | |
| 561. |
Most dinoflagellates are___________? |
| A. | Unicellular |
| B. | Multicellular |
| C. | Both of these |
| D. | Zooflagellates |
| Answer» B. Multicellular | |
| 562. |
Plasmodium belongs to__________? |
| A. | Ciliates |
| B. | Apicomplexans |
| C. | Actinopods |
| D. | Foraminferans |
| Answer» C. Actinopods | |
| 563. |
Kingdom protista includes_____________phyla? |
| A. | 27 |
| B. | 28 |
| C. | 26 |
| D. | 29 |
| Answer» B. 28 | |
| 564. |
Ecological role of fungi as decomposers is only paralleled by_____________? |
| A. | Cyanobacteria |
| B. | Blue green algae |
| C. | Bacteria |
| D. | Virus |
| Answer» D. Virus | |
| 565. |
Which of the protozoa has a striking resemblance to collar cells in sponges_____________? |
| A. | Zooflagellates |
| B. | Choanflagellates |
| C. | Trypanosomoa |
| D. | Trichonymphas |
| Answer» C. Trypanosomoa | |
| 566. |
MSH is produced from___________? |
| A. | Anterior pituitary |
| B. | Median pituitary |
| C. | Posterior pituitary |
| D. | None of these |
| Answer» C. Posterior pituitary | |
| 567. |
In slime molds spores develop into__________? |
| A. | Swarm cells |
| B. | Biflagellated cells |
| C. | Amoeboid reproductive cells |
| D. | All of these |
| Answer» E. | |
| 568. |
Radiolarians belong to which of the following protozoal group____________? |
| A. | Zooflagellates |
| B. | Actinopods |
| C. | Foraminifera |
| D. | Apicomplexans |
| Answer» C. Foraminifera | |
| 569. |
Which of the following statement about eiliates in incorrect_____________? |
| A. | Contain mainly unicellular organisms |
| B. | Their contractile vacoule is respobsible for water regulation |
| C. | They are even capable of sexual reproduction |
| D. | Diploid nucleus being smaller is responsible for cells metabolism and growth while polyploidy nucleus functions in sexual process. |
| Answer» E. | |
| 570. |
Of the following which one is not the characteristic of green algae? |
| A. | Some green algae possess cell wall with cellulose |
| B. | They are generally accepted as the ancestors of green plants |
| C. | Chlorella is unicellular non-motile green algae |
| D. | None of these |
| Answer» B. They are generally accepted as the ancestors of green plants | |
| 571. |
Simple breaking of mycelium resulting in formation of a new mycelium from each broken segments is called__________? |
| A. | Sporing |
| B. | Conidiation |
| C. | Budding |
| D. | Fragmentation |
| Answer» E. | |
| 572. |
In chlorophytes the main energy stores are__________? |
| A. | Cellulose |
| B. | Starch |
| C. | Glycogen |
| D. | All of these |
| Answer» C. Glycogen | |
| 573. |
In which group of tracheophytes ovules are born on the exposed surface of megasporophylls______________? |
| A. | Spheospsida |
| B. | Filicineae |
| C. | Gymnosperms |
| D. | Angiosperms |
| Answer» D. Angiosperms | |
| 574. |
Which of the following statement is incorrect about asexual reproduction by spores in fungi? |
| A. | Spores are haploid structures |
| B. | They are dispersed via wind water and insects |
| C. | On falling to a suitable place they germinate |
| D. | These are produced through fruiting bodies like ascocarps and basidiocarps. |
| Answer» E. | |
| 575. |
At which stage in the life cycle of Rhizopus meiosis takes place? |
| A. | Formation of sporangiophore via germination of zygospore |
| B. | Formation of spores in sporangia |
| C. | Fusion of two hyphae |
| D. | Formation of Zygote by fusion of gametangia |
| Answer» B. Formation of spores in sporangia | |
| 576. |
Mycorrhizae are found in about__________vascular plants? |
| A. | 90% |
| B. | 95% |
| C. | 98% |
| D. | 96% |
| Answer» C. 98% | |
| 577. |
Which of the following is called black bread mold? |
| A. | Pilobolus |
| B. | Penicillium |
| C. | Neurospora |
| D. | Rhizopus |
| Answer» E. | |
| 578. |
According to two kingdom classification fungi were placed in kingdom___________? |
| A. | Plantae |
| B. | Animalia |
| C. | Protista |
| D. | Fungi |
| Answer» B. Animalia | |
| 579. |
Based on molecular data euglenoids are thought to be closely related to___________? |
| A. | Dinoflagellates |
| B. | Zooflagellates |
| C. | Protozoans |
| D. | Algae |
| Answer» C. Protozoans | |
| 580. |
Mode of nutrition in penecillium is____________? |
| A. | Saprotrophs |
| B. | Parasitic |
| C. | Predators |
| D. | Mutualistics |
| Answer» B. Parasitic | |
| 581. |
Stunted growth of roots is due to the deficiency of____________in plants? |
| A. | Potassium |
| B. | Magnesium |
| C. | Phosphorus |
| D. | Iron |
| Answer» D. Iron | |
| 582. |
The cells present in testes and secrete testosterone are___________? |
| A. | Sertoli cells |
| B. | Germinal cell |
| C. | Interstitial cells |
| D. | Spermatocyte |
| Answer» D. Spermatocyte | |
| 583. |
Those fungi which can grow only on their living host and cannot be grown on available defined growth culture medium e.g. various mildews and most rust species are called_____________? |
| A. | Parasitic fungi |
| B. | Obligate parasitic fungi |
| C. | Facultative parasitic fungi |
| D. | All of these |
| Answer» C. Facultative parasitic fungi | |
| 584. |
____________is about 2.4 meter in length and comprising about two fifth of the small intestine? |
| A. | Duodenum |
| B. | Jejunum |
| C. | Ileum |
| D. | Caecum |
| Answer» C. Ileum | |
| 585. |
Spores produced by slime molds are__________? |
| A. | Haploid |
| B. | Diploid |
| C. | Triploid |
| D. | None of these |
| Answer» B. Diploid | |
| 586. |
Which of the following statement about AIDS is incorrect: |
| A. | is a host specific disease |
| B. | An infected mother cannot pass the virus to her baby. |
| C. | Results in enlargement of lymph nodes |
| D. | Can be prevented. |
| Answer» C. Results in enlargement of lymph nodes | |
| 587. |
Hydra is an example of ______________ feeder? |
| A. | Fluid |
| B. | Macrophagous |
| C. | Fluid |
| D. | All of these |
| Answer» C. Fluid | |
| 588. |
Certain types of whales are also __________ feeder? |
| A. | Fluid |
| B. | Macrophagous |
| C. | Filter |
| D. | None of these |
| Answer» D. None of these | |
| 589. |
An isolated virus is not considered living since it________________? |
| A. | Separates in to two inner parts |
| B. | Can not metabolize |
| C. | Rapidly looses its Genome chemical inert |
| D. | Is coated with an air tight shield |
| Answer» C. Rapidly looses its Genome chemical inert | |
| 590. |
Fungi can tolerate pH from____________? |
| A. | 3-7 |
| B. | 2-6 |
| C. | 2-9 |
| D. | 3-6 |
| Answer» D. 3-6 | |
| 591. |
One of the commonest cause of food poisoning are the toxins produced by__________? |
| A. | Azobacter |
| B. | Nitrosomonas |
| C. | Campylobacter |
| D. | Nitrobacter |
| Answer» D. Nitrobacter | |
| 592. |
The liquid that escapes during defrosting frozen meat contains _____ bacteria? |
| A. | Campylobacter |
| B. | Nitrobacter |
| C. | Azobacter |
| D. | Salmonella |
| Answer» E. | |
| 593. |
Bacteriopahage that infect E. coli are called_____________? |
| A. | M type |
| B. | N type |
| C. | T type |
| D. | S type |
| Answer» D. S type | |
| 594. |
Which of the following is the smallest known virus: |
| A. | Hepatitis virus |
| B. | Retrovirus |
| C. | Polio virus |
| D. | Pox virus |
| Answer» D. Pox virus | |
| 595. |
Which of the statement about viruses is incorrect___________________? |
| A. | We can not grow them in laboratories on artificial medias |
| B. | They are obligate intracellular parasite. |
| C. | They can synthesize their nucleic acid |
| D. | They are resistant to most of antibiotic treatment |
| Answer» D. They are resistant to most of antibiotic treatment | |
| 596. |
Vaccine Was discovered by______________? |
| A. | Louis Pasteur |
| B. | Edward Jennar |
| C. | Ivanowski |
| D. | Stanely |
| Answer» C. Ivanowski | |
| 597. |
The word which E-Chatton suggested for bacteria and blue green algae was_____________? |
| A. | Autotrophs |
| B. | Heterotrophs |
| C. | Pro-cariotique |
| D. | Eu-cariotique |
| Answer» D. Eu-cariotique | |
| 598. |
Complex symptoms like severe pneumonia vascular tumor sudden weight loss swollen lymph nodes and immune deficiency are features of: |
| A. | Polio |
| B. | Hepatitis |
| C. | AIDS |
| D. | HIV |
| Answer» D. HIV | |
| 599. |
Protein subunits of capsid is called the capsomeres is a characteristic of each virus. Their number in Herpes virus is__________? |
| A. | 100 |
| B. | 152 |
| C. | 162 |
| D. | 172 |
| Answer» D. 172 | |
| 600. |
Other name for Kingdom monera is_______________? |
| A. | Protoctista |
| B. | Prokaryotae |
| C. | Archae |
| D. | None of these |
| Answer» C. Archae | |