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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 9451. |
Nostoc is known to perform [MP PMT 2001] |
| A. | Only photosynthesis |
| B. | Photosynthesis and nitrogen fixation simultaneously |
| C. | Only nitrogen fixation |
| D. | Either photosynthesis or nitrogen fixation at a time |
| Answer» C. Only nitrogen fixation | |
| 9452. |
Cyanobacteria of great nutritive value is [Kerala CET 2001] |
| A. | Gleocapsa |
| B. | Scytonema |
| C. | Stigonema |
| D. | Spirulina |
| Answer» E. | |
| 9453. |
Which of the following is used as green manure |
| A. | Bacteria |
| B. | Mycoplasma |
| C. | Nostoc |
| D. | None of these |
| Answer» D. None of these | |
| 9454. |
Sexual reproduction is absent in [MP PMT 2000] |
| A. | Cyanobacteria |
| B. | Bacteria |
| C. | Eukaryote |
| D. | All of the above |
| Answer» B. Bacteria | |
| 9455. |
In prokaryotes, the genetic material is [CBSE PMT 1999; RPMT 1999] |
| A. | Linear DNA with histones |
| B. | Circular DNA with histones |
| C. | Linear DNA without histones |
| D. | Circular DNA without histones |
| Answer» E. | |
| 9456. |
Nostoc is characteristic in having [MP PMT 1998] |
| A. | Cellulose cell wall |
| B. | Uniflagellated zoospores |
| C. | Chlorophyll 'e' |
| D. | Sexual reproduction |
| Answer» B. Uniflagellated zoospores | |
| 9457. |
Cynobacteria is a [CPMT 2002] |
| A. | Virus which affect bacteria |
| B. | Bacteria which used cyanide as nutrition |
| C. | Algae which has blue-green pigment |
| D. | Colourful fungi |
| Answer» D. Colourful fungi | |
| 9458. |
Heterocysts are found in certain [BHU 1995; MP PMT 1997] |
| A. | Viruses |
| B. | Bacteria |
| C. | Cyanobacteria |
| D. | Mycoplasmas |
| Answer» D. Mycoplasmas | |
| 9459. |
Unicellular cyanobacteria reproduce asexually by [MP PMT 1997] |
| A. | Conjugation |
| B. | Fragmentation |
| C. | Binary fission |
| D. | Hormogones |
| Answer» D. Hormogones | |
| 9460. |
The following micro-organisms have the property of photosynthesis as well as nitrogen fixation |
| A. | Azotobacter |
| B. | Rhizobium |
| C. | Cyanobacteria |
| D. | Clostridium |
| Answer» D. Clostridium | |
| 9461. |
Cyanophyceae has got [DPMT 1991] |
| A. | Definite nucleus and plastid |
| B. | No definite nucleus but plastid |
| C. | Neither definite nucleus nor plastid |
| D. | Definite nucleus but no plastid |
| Answer» D. Definite nucleus but no plastid | |
| 9462. |
Which of the following shows the absence of chlorophyll 'b' |
| A. | Green algae |
| B. | Red algae |
| C. | Blue-green algae |
| D. | Brown algae |
| Answer» D. Brown algae | |
| 9463. |
Which is not true for the heterocyst of Nostoc |
| A. | Intercalary position |
| B. | Site of nitrogen fixation |
| C. | Presence of polar nodules |
| D. | \[C{{O}_{2}}\] fixation ability |
| Answer» E. | |
| 9464. |
Atmospheric nitrogen-fixation is carried on by [Pb. PMT 1999] |
| A. | Funaria |
| B. | Anabaena |
| C. | Chlamydomonas |
| D. | Fern gametophyte |
| Answer» C. Chlamydomonas | |
| 9465. |
Hormogonia are the vegetatively reproducing structures of [AIIMS 1999] |
| A. | Ulothrix |
| B. | Spirogyra |
| C. | Oscillatoria |
| D. | Chlamydomonas |
| Answer» D. Chlamydomonas | |
| 9466. |
During rainy seasons, the ground becomes slippery due to dense growth of [BHU 1999] |
| A. | Lichens |
| B. | Bacteria |
| C. | Green algae |
| D. | Cyanobacteria |
| Answer» E. | |
| 9467. |
Blue-green algae belong to [CPMT 1982] |
| A. | Myxomycetes |
| B. | The eukaryota |
| C. | The prokaryota |
| D. | Neither the eukaryota nor the prokaryota |
| Answer» D. Neither the eukaryota nor the prokaryota | |
| 9468. |
When green algae are illuminated, motile aerobic bacteria usually accumulate near them. This is because, bacteria [NCERT 1984] |
| A. | Have attraction for light |
| B. | Have attraction for green plants |
| C. | Have attraction for oxygen |
| D. | Have attraction for \[C{{O}_{2}}\] |
| Answer» D. Have attraction for \[C{{O}_{2}}\] | |
| 9469. |
Which were the organisms who changed earth?s surface from reducing to the oxidizing [BHU 2001] |
| A. | Autotrophs |
| B. | Heterotrophs |
| C. | Photoautotrophs |
| D. | Chemotrophs |
| Answer» D. Chemotrophs | |
| 9470. |
Cyanobacteria is a |
| A. | Category of bacteria |
| B. | Is the new name of all bacteria |
| C. | New name of myxophyceae or blue-green algae |
| D. | None of the above |
| Answer» D. None of the above | |
| 9471. |
Prokaryotes are identified by [Bihar MDAT 1995] |
| A. | Absence of mitochondria |
| B. | Absence of nuclear membrane |
| C. | Absence of chloroplast |
| D. | Absence of cell membrane |
| Answer» C. Absence of chloroplast | |
| 9472. |
The name cyanobacteria refers to [MP PMT 1992] |
| A. | Bacteria |
| B. | Blue-green algae |
| C. | Yeast |
| D. | Fungi |
| Answer» 3orr53t 1nsw5r:. Fungi | |
| 9473. |
Which of the following has polar nodule on both the ends |
| A. | Akinetes |
| B. | Hormogonia |
| C. | Heterocysts |
| D. | None of these |
| Answer» D. None of these | |
| 9474. |
The cells of cyanobacteria and bacteria exhibit similarity in having [BHU 1982] |
| A. | Plastids |
| B. | Nuclei (True) |
| C. | Centrosome |
| D. | DNA |
| Answer» E. | |
| 9475. |
Prokaryotes are characterized by [AFMC 1993] |
| A. | A true nucleus with double layered nuclear membrane is absent |
| B. | Well developed nucleus with double layered nuclear membrane present |
| C. | Presence of cell wall made of chitins, mucopolysaccharides and absence of cell organelles like mitochondria and chloroplasts |
| D. | Autotrophic in nature and only DNA is present |
| Answer» D. Autotrophic in nature and only DNA is present | |
| 9476. |
Which of the following algae is symbiotic and nitrogen fixing [Pb. PMT 1999] |
| A. | Spirogyra |
| B. | Cladophora |
| C. | Anabaena |
| D. | Oedogonium |
| Answer» D. Oedogonium | |
| 9477. |
In which of the following there is no sexual reproduction [MP PMT 1987; CBSE PMT 1995, 99; BVP 2001] |
| A. | Ulothrix |
| B. | Nostoc |
| C. | Aspergillus |
| D. | Volvox |
| Answer» C. Aspergillus | |
| 9478. |
Single filament of Nostoc without mucilage sheath is known as [MP PMT 1986; AIIMS 1998] |
| A. | Hyphae |
| B. | Colony |
| C. | Trichome |
| D. | Mycilium |
| Answer» D. Mycilium | |
| 9479. |
Which of the following may be called as fission algae |
| A. | Nostoc |
| B. | Oedogonium |
| C. | Volvox |
| D. | None of these |
| Answer» B. Oedogonium | |
| 9480. |
Which of the following contains polyhedral bodies |
| A. | Mycoplasma |
| B. | Bacteria |
| C. | Nostoc |
| D. | None of these |
| Answer» D. None of these | |
| 9481. |
In Nostoc the heterocysts are |
| A. | Terminal |
| B. | Intercalary |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» C. Both (a) and (b) | |
| 9482. |
According to Bradley and Carr, the nitrogen fixation takes place in |
| A. | Akinetes |
| B. | Vegetative cells |
| C. | Heterocysts |
| D. | All the above |
| Answer» D. All the above | |
| 9483. |
Incipient nucleus is present in [BVP 2000] |
| A. | Chlorophyceae |
| B. | Rhodophyceae |
| C. | Myxophyceae |
| D. | Phaeophyceae |
| Answer» D. Phaeophyceae | |
| 9484. |
What is the photosynthetic product in blue-green algae |
| A. | Normal starch |
| B. | Glycogen |
| C. | Cyanophycean starch resembling glycogen |
| D. | None of these |
| Answer» D. None of these | |
| 9485. |
The fossil record of blue-green algae is in |
| A. | Palaeozoic |
| B. | Pre?palaeozoic |
| C. | Carboniferous |
| D. | None of these |
| Answer» C. Carboniferous | |
| 9486. |
Which of the following important features are found in blue-green algae |
| A. | Abundant secretion of pectin |
| B. | Presence of phycocyanin - C as dominant pigment |
| C. | No plastids |
| D. | All the above |
| Answer» E. | |
| 9487. |
Which of the following movement may be found in blue-green algae |
| A. | Flagellar |
| B. | Ciliary |
| C. | Gliding |
| D. | None of the above |
| Answer» D. None of the above | |
| 9488. |
Which cell division occurs in Nostoc |
| A. | Mitotic |
| B. | Meiotic |
| C. | Amitotic |
| D. | All |
| Answer» D. All | |
| 9489. |
Which of the following characters of Nostoc resembles other prokaryotes |
| A. | Absence of definite nucleus |
| B. | Ability to fix nitrogen |
| C. | Multiplication by fission |
| D. | All the above |
| Answer» E. | |
| 9490. |
Which of the following may occur in arctic and alpine meadows |
| A. | Spirogyra |
| B. | Ulothrix |
| C. | Nostoc |
| D. | None of these |
| Answer» D. None of these | |
| 9491. |
Which may live as a space parasite in Anthoceros |
| A. | Ulothrix |
| B. | Spirogyra |
| C. | Nostoc |
| D. | None of these |
| Answer» D. None of these | |
| 9492. |
The theory of "continental drift" was originally proposed by [AMU 1997] |
| A. | Alfred Bailey |
| B. | Charles Darwin |
| C. | Alfred Wegener |
| D. | Robert I. Bowman |
| Answer» D. Robert I. Bowman | |
| 9493. |
In which of them, induced breeding is effective [MP PMT 1995] |
| A. | Sericulture |
| B. | Apiculture |
| C. | Lac culture |
| D. | Pisciculture |
| Answer» E. | |
| 9494. |
Which of the following subdivisions deals with fossils [Orissa JEE 1990, 95 KCET 1990, 94; CBSE PMT 1991; JKCMEE 2002] |
| A. | Ecology |
| B. | Ornithology |
| C. | Ethology |
| D. | Palaeontology |
| Answer» E. | |
| 9495. |
The term 'Fisheries' refers to [St. Johns MC 2002] |
| A. | Marine fish resources |
| B. | Fresh water fish resource |
| C. | Both marine and freshwater fish resource |
| D. | All the animal resources from aquatic environment |
| Answer» E. | |
| 9496. |
Which one of the following statements is correct regarding evolution of mankind [CBSE PMT 1997] |
| A. | Neanderthal man and Cro-Magnon man were living at the same time |
| B. | Australopithecus was living in Australia |
| C. | Homo erectus is preceded by Homo habilis |
| D. | None of these |
| Answer» D. None of these | |
| 9497. |
Which one these are never present in frog?s ovary [CBSE PMT 1989] |
| A. | Oogonia |
| B. | Corpus luteum |
| C. | Ovarian follicles |
| D. | Germinal epithelium |
| Answer» C. Ovarian follicles | |
| 9498. |
Simian shelf is a characteristic of apes, which connects the [CPMT 1980] |
| A. | Limbs with girdle |
| B. | Brain |
| C. | Posterior part of the mandibles |
| D. | Anterior part of the mandibles |
| Answer» E. | |
| 9499. |
Velocity of conduction of nerve impulse in frog is [CBSE PMT 1991, 93] |
| A. | Faster than sound |
| B. | 30 metre per second |
| C. | 300 metre per second |
| D. | None of these |
| Answer» E. | |
| 9500. |
When a cluster of genes shows linkage behaviour they [CBSE PMT 2003] |
| A. | Induce cell division |
| B. | Do not show a chromosome map |
| C. | Show recombination during meiosis |
| D. | Do not show independent assortment |
| Answer» E. | |