biology Mcqs
501. Second largest phylum of invertebrates is____________?
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A. Porifera

B. Arthropoda

C. Chordata

D. Mollusca
502. Kangaroo rat most probably would be found in___________?
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A. Tropical rain forest

B. Desert

C. Tundra

D. Grass land

503. Polychaeta have____________?
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A. Palps

B. Eyes

C. All of these

D. Tentacles

504. In life cycle of bacteriophage which step occur after attachment of prophage with the receptor site of the bacterial cell wall_____________?
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A. Lysogeny

B. Penetration

C. Multiplication

D. Absorption

505. Deficiency of which of the following causes chlorosis__________________?
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A. Nitrogen

B. Magnesium

C. Iron

D. Both A and B
506. The size of smallest virus is______________?
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A. 10 nm

B. 20 nm

C. 40 nm

D. 30 nm

507. Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch_____________?
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A. It is possible to recover the organism in pure culture from the experimentally infected animals

B. The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.

C. The organism can be isolated and grown in pure culture in the laboratories

D. A specific organism can always be found in association with a given disease

508. Complex specialized flagellates living symbiotically in the gut of termites are___________?
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A. Euglena

B. Trypanosoma

C. Trichonymphas

D. Radiolarians

509. Which of the protozoa has a striking resemblance to collar cells in sponges_____________?
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A. Trypanosomoa

B. Zooflagellates

C. Trichonymphas

D. Choanflagellates
510. Dipeptides into amino acids are are converted through_____________?
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A. Trypsin

B. Erypsin

C. Pepsin

D. Amino peptidase

511. Incomplete or imperfect digestion is known as________?
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A. Obesity

B. Dyspepsia

C. Anorexia nervous

D. Bulimia nervosa

512. Mode of transmission of hepatitis A is__________?
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A. Faeco-oral

B. All of these

C. Sexual contact

D. Serum

513. The skeleton of sponges is made up of___________?
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A. Calcium

B. Silica

C. Both of these

D. None of these

514. Excretory system of platyhlminthes consists of___________?
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A. Nephrons

B. Malpighian tubules

C. Nephridia

D. Flame cells
515. Simple breaking of mycelium resulting in formation of a new mycelium from each broken segments is called__________?
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A. Conidiation

B. Sporing

C. Budding

D. Fragmentation
516. How many species of ascomycota occur in lichen symbiotic association?
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A. 40%

B. 30%

C. 60%

D. 50%
517. Who developed the vaccine against anthrax?
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A. Alexander Fleming

B. Edward Jennar

C. Louis Pasteur

D. Leuvenhoek

518. Mammals became dominant in__________?
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A. Cenozoic era

B. Proterozoic era

C. Paleozoic era

D. Mesozoic era

519. Who coined the term Animalcules for microorganisms like Bacteria and protozoa______________?
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A. Louis Pasteur

B. Leeuwenhoek

C. Robert Koch

D. Alexander Fleming

520. A group of 8 cocci is called______________?
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A. Octococci

B. Diplococci

C. Sarcina

D. Tetrad

521. Spirochete is an example of___________?
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A. Aerobic bacteria

B. Anaerobic bacteria

C. Facultative bacteria

D. Microaerophilic

522. mitochondria in ear lobe cells are nearly____________?
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A. 60

B. 55

C. 40

D. 50
523. Which one of the following specially result in chronic liver disease leading to hepatic failure:
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A. HCV

B. HAV

C. HEV

D. HBV

524. Porifera range in size from__________?
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A. One meter wide to more than millimeter tall.

B. Few decimeter wide to more than one meter tall

C. Few centimeter wide to more than one meter tall

D. Few millimeter wide to more than one meter tall
525. A painful burning sensation produced in the chest cavity usually associated with the back flush of acidic chyme into the esophagus is__________?
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A. Pyrosis

B. Pyrolysis

C. Dyspepsia

D. Peristalsis

526. Which of the following structure is not present in all the bacteria_____________?
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A. Capsule

B. Ribosomes

C. Chromatin bodies

D. Cell membrane

527. All of the following are coelomates except:____________?
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A. Deuterosomes

B. Aschelminthes

C. Hemichordates

D. Proterosomes

528. __________ are believed to have common origin with annelids.
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A. Nematods

B. Arthropods

C. None of these

D. Molluscs

529. Penicillium reproduce via___________?
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A. Budding

B. Conidia

C. Spores

D. Fragmentation

530. The word Archaeobacteria (a division of bacteria) derived from Greek means___________?
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A. False bacteria

B. Recent bacteria

C. Ancient bacteria

D. True bacteria

531. Purple non-sulphur bacteria is an example of___________?
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A. Saprotrophic bacteria

B. Chemosynthetic bacteria

C. Photosynthetic bacteria

D. Heterotrophic bacteria

532. One of the commonest cause of food poisoning are the toxins produced by__________?
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A. Campylobacter

B. Azobacter

C. Nitrosomonas

D. Nitrobacter

533. Which of the following group represent pathological fungi______________?
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A. All of these

B. Rusts smuts and molds

C. Mushrooms morels and truffles

D. Penicillium

534. The first bacterium isolated was_________________?
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A. Coccus

B. Spirochete

C. Vibrio

D. Bacillus
535. Pin warm is common name used for__________?
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A. Rhabditis

B. Taenia solium

C. Ancylostoma duodenale

D. Enterobius vermicularis
536. Which system is present in nematodes?
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A. Tube like digestive system

B. Respiratory system

C. Circulatory system

D. Sac like digestive system

537. Fungi can tolerate pH from____________?
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A. 6-Mar

B. 7-Mar

C. 6-Feb

D. 2-9
538. mitochondria in heart muscles are nearly_____________?
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A. 400

B. 325

C. 375

D. 350
539. Flagella originate from_______________?
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A. Basal body

B. Capsule

C. Cell wall

D. Cell membrane

540. According to two kingdom classification fungi were placed in kingdom___________?
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A. Plantae

B. Animalia

C. Fungi

D. Protista

541. Of the following which one is not the characteristic of green algae?
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A. They are generally accepted as the ancestors of green plants

B. None of these

C. Chlorella is unicellular non-motile green algae

D. Some green algae possess cell wall with cellulose
542. Certain types of whales are also __________ feeder?
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A. Macrophagous

B. Filter

C. Fluid

D. None of these

543. 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_____________?
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A. All of these

B. Obligate parasitic fungi

C. Parasitic fungi

D. Facultative parasitic fungi

544. Of the following which one is not the characteristic of Kingdom Animalia.
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A. All animals are eukaryotes

B. All animals are ingestive heterotrophs

C. It is largest kingdom.

D. All animals develop from the dissimilar gametes i.e. large sperm and small egg.
545. Which of the following statement about Kingdom Protista is incorrect_______________?
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A. They contain ancestors for fungi plants & animals

B. They only include unicellular aquatic eukaryotic organisms

C. Their members have characteristics which separate them from other kingdoms

D. They do not develop from Blastula or embryo

546. Which of the following statement about AIDS is incorrect:
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A. An infected mother cannot pass the virus to her baby.

B. Results in enlargement of lymph nodes

C. Can be prevented.

D. is a host specific disease

547. 80% of the food of sponges consists of__________?
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A. Phytoplanktons

B. Zooplankton and small animals

C. all of these

D. Detrital organic particles
548. Golden algae are also known as___________?
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A. Pyrrophyta

B. Phaeophyta

C. Rhodophyta

D. Chrysophyta
549. Of the following which one is not included in Proterostomes?
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A. Molluses

B. Annelids

C. Arthropods

D. Hemichordates
550. Ecological role of fungi as decomposers is only paralleled by_____________?
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A. Bacteria

B. Virus

C. Blue green algae

D. Cyanobacteria