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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.
| 451. |
Genes of colour blindness are carried in [BHU 1985] |
| A. | Eye cells |
| B. | Sex cells |
| C. | Body cells |
| D. | Heterosomes |
| Answer» E. | |
| 452. |
Which one of the following have high \[C{{O}_{2}}\] compensation point? |
| A. | \[{{C}_{2}}\] plants |
| B. | \[{{C}_{3}}\] plants |
| C. | \[{{C}_{4}}\] plants |
| D. | Alpine herbs |
| Answer» C. \[{{C}_{4}}\] plants | |
| 453. |
Thorn of Bougainvillea is modified [Bihar PMT 1994] |
| A. | Stem |
| B. | Leaf |
| C. | Floral bud |
| D. | Root |
| Answer» B. Leaf | |
| 454. |
Free Martin condition is found in |
| A. | Man |
| B. | Sheep, goat etc. |
| C. | Rabbit |
| D. | Frog |
| Answer» C. Rabbit | |
| 455. |
Sheath nuclei or Schwann cells and Nodes of Ranvier are found in: |
| A. | Neurons |
| B. | Osteoblasts |
| C. | Chondroblasts |
| D. | Gland cells |
| Answer» B. Osteoblasts | |
| 456. |
Insectivorous plant with rosette of spiny margined bilobed hinged and winged leaves for catching the prey is [CPMT 1992] |
| A. | Nepenthes |
| B. | Drosera |
| C. | Dionaea |
| D. | Utricularia |
| Answer» D. Utricularia | |
| 457. |
Vascular bundles are arranged in a ring in the members of family [Kerala CET 2005] |
| A. | Orchidaceae |
| B. | Iridaceae |
| C. | Euphorbiaceae |
| D. | Liliaceae |
| E. | Palmae |
| Answer» D. Liliaceae | |
| 458. |
Fascicular, interfascicular and extra-stelar cambium together constitute [AMU 1991] |
| A. | Lateral meristem |
| B. | Apical meristem |
| C. | Intercalary meristem |
| D. | Ground meristem |
| Answer» B. Apical meristem | |
| 459. |
Choose the correct combination of labelling of the molecules involved in the pathway of anaerobic respiration, in yeast: |
| A. | 1 -Ethanol, 2-\[C{{O}_{2}}\], 3- Acetaldehyde |
| B. | 1 -Ethanol, 2- Acetaldehyde, 3-\[C{{O}_{2}}\] |
| C. | 1 -\[C{{O}_{2}}\], 2-Ethanol, 3- Acetaldehyde |
| D. | 1 -\[C{{O}_{2}}\], 2-Acetaldehyde, 3- Ethanol |
| Answer» C. 1 -\[C{{O}_{2}}\], 2-Ethanol, 3- Acetaldehyde | |
| 460. |
Assertion : Indusium dries in mature sours and releases sporangia. Reason : Mature sporangium releases spores by the structures-annulus and stomium. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» C. If the assertion is true but the reason is false | |
| 461. |
Stomata of a plant open due to: |
| A. | Influx of calcium ions |
| B. | Influx of potassium ions |
| C. | Efflux of potassium ions |
| D. | Influx of hydrogen ions |
| Answer» C. Efflux of potassium ions | |
| 462. |
The plants bend towards light because: |
| A. | The stem likes sunlight. |
| B. | The roots send the message to the stem to do so. |
| C. | Due to secretion of growth promoting substances at the tip. |
| D. | The food material is translocated from leaves to stem causing bending. |
| Answer» D. The food material is translocated from leaves to stem causing bending. | |
| 463. |
Assertion : The bacteria cysts are produced to avoid unfavourable conditions. Reason : Bacillus anthracis and Clostridium survive for very long durations due to endospores. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 464. |
Assertion : The sex organs in the bryophytes are jacketed. Reason : Bryophytes are land plants. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 465. |
Zygotic meiosis takes place in [MP PMT 1998] |
| A. | Selaginella |
| B. | Spirogyra |
| C. | Pinus |
| D. | Brassica |
| Answer» C. Pinus | |
| 466. |
Which of the following form contain algae [BHU 2005] |
| A. | Equisetum |
| B. | Selaginella |
| C. | Marsilea |
| D. | None of these |
| Answer» E. | |
| 467. |
Assertion : Basidiocarps are called fungus flowers. Reason : The beautiful fruit bodies are found in Basidiomycotina. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 468. |
Match column-I (function) with column-II (Types of enzymes) and select the correct option. Column-I Column-II A. Daek band I. H-Zone B. Krause membrane II. A-band C. A light line III. I-band D. Myofibrils IV. Sarcostyles |
| A. | A-III; B-II; C-I; D-IV |
| B. | A-II; B-III; C-IV; D-I |
| C. | A-II; B-III; C-I; D-IV |
| D. | A-II; B-I; C-III; D-IV |
| Answer» D. A-II; B-I; C-III; D-IV | |
| 469. |
When a bacterium is provided with flagella arising from two opposite ends, it is called [KCET 1998; CPMT 2001] |
| A. | Monotrichous |
| B. | Lophotrichous |
| C. | Amphitrichous |
| D. | Polytrichous |
| Answer» D. Polytrichous | |
| 470. |
Assertion : Yeast are the best source of vitamin B complex. Reason : Ashbya gossypii is a filamentous yeast. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» C. If the assertion is true but the reason is false | |
| 471. |
The substance which can deactivate the virus is called |
| A. | Viricide |
| B. | Germicide |
| C. | Antibiotic |
| D. | Insecticide |
| Answer» B. Germicide | |
| 472. |
Resin canals are [CPMT 1988] |
| A. | Schizogenous |
| B. | Lysigenous |
| C. | Schizolysigenous |
| D. | None of the above |
| Answer» B. Lysigenous | |
| 473. |
Curing of genetic diseases is studied under |
| A. | Genetics |
| B. | Eugenics |
| C. | Euphenics |
| D. | Dysgenics |
| Answer» D. Dysgenics | |
| 474. |
Lady finger belongs to family [BHU 2005] |
| A. | Malvaceae |
| B. | Cucurbitaceae |
| C. | Liliaceae |
| D. | Brassicaeae |
| Answer» B. Cucurbitaceae | |
| 475. |
Spirogyra increases its body length by the division of: |
| A. | every cell of the body. |
| B. | the apical cell. |
| C. | the basal cell. |
| D. | accumulation of food in his body. |
| Answer» B. the apical cell. | |
| 476. |
Leucocytes (WBCs) are considered as true cells because |
| A. | They possess nucleus |
| B. | They do not contain haemoglobin |
| C. | They show great power of movement |
| D. | They are responsible for phagocytic activity |
| Answer» B. They do not contain haemoglobin | |
| 477. |
Read the assertion and reason carefully: Assertion : Adiantum caudatum is a walking fern. Reason : Adiantum grows vegetatively by their leaf tips. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 478. |
The activity of succinate dehydrogenase is inhibited by: |
| A. | Pyruvate |
| B. | Glycolate |
| C. | Malonate |
| D. | Phosphoglycerate |
| Answer» D. Phosphoglycerate | |
| 479. |
Which of the following vitamins is needed for the formation of collagen? (AMU 2003) |
| A. | Vitamin \[{{B}_{1}}\] |
| B. | Vitamin C |
| C. | Vitamin A |
| D. | Vitamin E |
| Answer» C. Vitamin A | |
| 480. |
Mycobacterium has |
| A. | Transient mycelium |
| B. | Extensive mycelium |
| C. | Both (a) and (b) |
| D. | None of the above |
| Answer» B. Extensive mycelium | |
| 481. |
A girl of normal vision whose father was colourblind marries a man of normal vision whose father was also colourblind. Their sons would be (of total number of sons) [MP PMT 1995] |
| A. | All colourblind |
| B. | 50% colourblind |
| C. | All normal |
| D. | 25% colourblind |
| Answer» C. All normal | |
| 482. |
Which of the following cartilage is present on the end of long bones [MP PMT 1998; CBSE PMT 2002] |
| A. | Elastic cartilage |
| B. | Fibrous cartilage |
| C. | Calcified cartilage |
| D. | Hyaline cartilage |
| Answer» E. | |
| 483. |
Haversian system is a diagnostic feature of [KCET 1994; MP PMT 2001; DPMT 2003] |
| A. | Avian bones |
| B. | All animals |
| C. | Mammalian bones only |
| D. | Reptilian bones |
| Answer» D. Reptilian bones | |
| 484. |
Read the assertion and reason carefully: Assertion : Caruncle is commonly found in the seeds of Euphorbiaceae. Reason : Caruncle does not show any distinct function. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» D. If both the assertion and reason are false | |
| 485. |
Four sepals arranged in two whorls is characteristic of family [Manipal 2001 BHU 2002] |
| A. | Solanaceae |
| B. | Fabaceae |
| C. | Brassicaceae |
| D. | Liliaceae |
| Answer» D. Liliaceae | |
| 486. |
Ultrastructure of cell can be best studied by [CBSE PMT 1999; MP PMT 2003] |
| A. | Autoradiography |
| B. | X-ray diffraction method |
| C. | Phase contrast microscope |
| D. | None of these |
| Answer» E. | |
| 487. |
Which one is the sex linked trait [BHU 1984, 86; CPMT 1978, 87, 90] |
| A. | Myxoedema |
| B. | Diabetes |
| C. | Blindness |
| D. | Haemophilia |
| Answer» E. | |
| 488. |
The yellow colour of cow's milk is due to: |
| A. | carotene |
| B. | riboflavin |
| C. | xanthophyll |
| D. | ascorbic acid |
| Answer» C. xanthophyll | |
| 489. |
Assertion : Fungal hyphae form a tissue known as plectenchyma. Reason : In pseudoparenchyma, the hypha are loosely held together. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» D. If both the assertion and reason are false | |
| 490. |
Tunica differs from corpus in |
| A. | Position |
| B. | Rate of growth |
| C. | Plane of division |
| D. | Region of activity |
| Answer» D. Region of activity | |
| 491. |
Assertion : The body of sarcodina bears a number of temporary pseudopodia. Reason : New pseudopodia are formed in the direction of locomotion. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 492. |
Identify figures-I and II. Figure - I Figure - II |
| A. | Fig. - I- Dense regular Fig. - II- Dense irregular connective tissue connective tissue |
| B. | Fig. - I- Loose irregular Fig. - II- Loose regular connective tissue connective tissue |
| C. | Fig. - I- Adipose tissue Fig. - II - Specialised connective tissue |
| D. | Fig. - I- Connective Fig. - II- Areolar tissue tissue proper |
| Answer» B. Fig. - I- Loose irregular Fig. - II- Loose regular connective tissue connective tissue | |
| 493. |
Exponential growth cannot be sustained for much time due to : (i) limited space and nutrient. (ii) Accumulation of toxic agent. (iii) Unlimited space and nutrient. (iv) Accumulation of nutrient agent. |
| A. | (i) and (iii) |
| B. | (iii) and (iv) |
| C. | (i) and (ii) |
| D. | (iv) and (ii) |
| Answer» D. (iv) and (ii) | |
| 494. |
Match column-I with column- II and select the correct answer using the codes given below. Column-I Column-II A. Gamete I. Result of fusion of male and female gametes. B. Budding II. Division of body into two equal halves. C. Fission III. Germ cells. D. Fertilisation IV. The fusion of male and female gametes. E. Zygote V. An unequal division of organisms in which individual arises as an outgrowth from the parent. |
| A. | A-I; B-II; C-III; D-IV; E-V |
| B. | A-III; B-V; C-II; D-IV; E-I |
| C. | A-III; B-I; C-V; D-II; E-IV |
| D. | A-V; B-IV; C-III; D-I; E-II |
| Answer» C. A-III; B-I; C-V; D-II; E-IV | |
| 495. |
The largest cell in a embryo sac is: |
| A. | Egg |
| B. | Central cell |
| C. | Synergid |
| D. | Antipodal cell |
| Answer» C. Synergid | |
| 496. |
Meiosis of megaspore mother cell generally produces: |
| A. | Linear tetrad |
| B. | Tetrahedral tetrad |
| C. | Decussate tetrad |
| D. | Isobilateral tetrad |
| Answer» B. Tetrahedral tetrad | |
| 497. |
Chemosynthetic bacteria are those bacteria [DPMT 1981] |
| A. | Which carry out photosynthesis |
| B. | Which synthesize food without light |
| C. | Which are unable to carry out chemical process |
| D. | Which carry out photosynthesis in absence of light |
| Answer» C. Which are unable to carry out chemical process | |
| 498. |
Dicot embryo consists of: |
| A. | Radicle and plumule |
| B. | Radicle, plumule, cotyledons and sometimes endosperm |
| C. | Radicle, plumule, cotyledons and tegmen |
| D. | Radicle, plumule, cotyledons, tegmen and testa |
| Answer» C. Radicle, plumule, cotyledons and tegmen | |
| 499. |
In dicot embryo, the radicle is formed by: |
| A. | Epibasal tier of embryo |
| B. | Hypobasal tier of embryo |
| C. | Hypophysis of suspensor |
| D. | Terminal cell of suspensor |
| Answer» D. Terminal cell of suspensor | |
| 500. |
Water in the adjacent xylem moves into the phloem by the process of: |
| A. | Facilitated diffusion |
| B. | Acute transport |
| C. | Simple diffusion |
| D. | Osmosis |
| Answer» E. | |