MCQOPTIONS
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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.
| 401. |
Which of the following animals have nuclei in their mature blood corpuscle cells [HP PMT 2005] |
| A. | Cow |
| B. | Horse |
| C. | Elephant |
| D. | None of the above |
| Answer» E. | |
| 402. |
The non-excitable, variously shaped and found between neurons are: |
| A. | Dendrites |
| B. | Nissi bodies |
| C. | Glial cells |
| D. | Schwann cell |
| Answer» D. Schwann cell | |
| 403. |
Which of the following statements are correct? (i) Photorespiration is favoured by high \[{{O}_{2}}\] low\[C{{O}_{2}}\], rise in temperature, high light intensity. (ii) Chloroplasts of cells of bundle sheath of \[{{C}_{4}}\] plants are granal, have PEP Co PEP Case but no RuBis Co. (iii) Chloroplasts of mesophyll cells of \[{{C}_{4}}\] plant are granal, have PEP Co PEP Case but no RuBis Co. (iv) Maize and Sorghum are \[{{C}_{4}}\] plants. |
| A. | All are correct except (ii) |
| B. | (i) and (iv) |
| C. | (ii) and (iii) |
| D. | Only (iv) |
| Answer» B. (i) and (iv) | |
| 404. |
One of the cyanobacteria rich in vitamin \[{{B}_{12}}\] carotenoids, iron and other essential nutrients, now being used in modem medicines as nutritional supplements, is: (AMU 2003) |
| A. | Nostoc |
| B. | Spirulina |
| C. | Anacystis |
| D. | Anabaena |
| Answer» C. Anacystis | |
| 405. |
Cell elongation in intemode regions of the green plants takes place due to: |
| A. | Ethylene |
| B. | Indole acetic acid |
| C. | Cytokinin |
| D. | Gibberellins |
| Answer» E. | |
| 406. |
Male gametophyte of angiosperms/monocots is: |
| A. | Microsporangium |
| B. | Nucellus |
| C. | Microspore |
| D. | Stamen |
| Answer» D. Stamen | |
| 407. |
The male gametophyte (microgametophyte) in case of monocots is: |
| A. | Tetrad |
| B. | Nucellus |
| C. | Megaspore |
| D. | Microspore |
| Answer» E. | |
| 408. |
Walls of sclerenchyma are [AIIMS 1990] |
| A. | Rigid |
| B. | Lignified |
| C. | Pactinised |
| D. | Suberised |
| Answer» C. Pactinised | |
| 409. |
Silk is produced by [AIIMS 1983; CBSE PMT 1988, 94; JIPMER 1985; RPMT 1989; MP PMT 1994; BHU 1999] |
| A. | Larva and adult moth |
| B. | Larva |
| C. | Adult moth |
| D. | Cocoon |
| Answer» C. Adult moth | |
| 410. |
Forest control drought though [CPMT 1986] |
| A. | Lot of water plants |
| B. | Increasing rainfall |
| C. | Retention of water and prevention of erosion |
| D. | Functioning as water shed |
| Answer» D. Functioning as water shed | |
| 411. |
pH of vacuolar cell sap is |
| A. | Neutral and isotonic |
| B. | Alkaline and hypotonic |
| C. | Acidic and hypertonic |
| D. | Equal to cytoplasm and isotonic |
| Answer» D. Equal to cytoplasm and isotonic | |
| 412. |
Assertion : Slime moulds are excellent material for the study of protoplasm. Reason : They lack cell organelles. |
| 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 | |
| 413. |
The dominant stage in Spirogyra is the sporophytic stage. |
| A. | It is correct. |
| B. | It is incorrect. |
| C. | Spirogyra does not display alternation of generation |
| D. | Sometimes [a] and [b] |
| Answer» C. Spirogyra does not display alternation of generation | |
| 414. |
Assertion : None autotrophic bacteria carry out chemosynthesis. Reason : Chemosynthetic bacteria trap the small amount of energy released from inorganic compound?s oxidation to use in the reactions that synthesize carbohydrates. |
| 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» E. If the assertion is false but reason is true | |
| 415. |
Binomial nomenclature means: |
| A. | One name given by two scientists. |
| B. | One scientific name consisting of a generic and specific epithet. |
| C. | Two names, one latinised, other of a person. |
| D. | Two names of same plant. |
| Answer» C. Two names, one latinised, other of a person. | |
| 416. |
Read the assertion and reason carefully: Assertion : Sapwood is less durable than the heartwood. Reason : Hollow tree trunks are due to the disappearance of sapwood. |
| 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 | |
| 417. |
I.Q. is the ratio of mental age to [CPMT 1983] |
| A. | Chronological age multiplied by ten |
| B. | Chronological age plus ten |
| C. | Chronological age plus 100 |
| D. | Chronological age multiplied by 100 |
| Answer» E. | |
| 418. |
Assertion : Flower is aggregation of sporophylls. Reason : Sporophylls are modified in angiosperms. |
| 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 | |
| 419. |
In Korper Kappe theory, term Korper is meant for body and Kappe is for |
| A. | Calyptrogen |
| B. | Cap |
| C. | Cortical |
| D. | Carpel |
| Answer» C. Cortical | |
| 420. |
Which one is the spinal nerve? |
| A. | Trigeminal |
| B. | Hypoglossal |
| C. | Olfactory |
| D. | None of these |
| Answer» E. | |
| 421. |
The following statements about nerve metabolism excitation and conduction are true except: |
| A. | Nerve fibre can be excited under anaerobic conditions. |
| B. | Nerve conduction proceeds in the absence of oxygen and development of action potential does not depend on metabolism immediately. |
| C. | In the absence of oxygen, action potential can be generated and nerve conduction proceeds, but later, it fails as the \[N{{a}^{+}}\] pump cannot operate. |
| D. | At rest, the oxygen consumption in the brain is lesser than what is seen in a nerve. |
| Answer» E. | |
| 422. |
The main plant body in pteridophyte is: |
| A. | sporophyte (2n) which is differentiated into root, stem and leaf. |
| B. | gametophyte (n) which is differentiated into root, stem and leaf. |
| C. | sporophyte having no root, stem and leaf. |
| D. | gametophyte having no root but only stem and leaf. |
| Answer» B. gametophyte (n) which is differentiated into root, stem and leaf. | |
| 423. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : With age, resistance power to diseases is lowered. Reason : With age, there is gradual degeneration of thymus gland. |
| 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 | |
| 424. |
A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected which of the following mode of inheritance do you suggest for this disease [CBSE PMT 2005] |
| A. | Autosomal dominant |
| B. | Sex-linked dominant |
| C. | Sex-limited recessive |
| D. | Sex-linked recessive |
| Answer» E. | |
| 425. |
Yeast produces an enzyme complex that is responsible for fermentation. The enzyme complex is [CPMT 1992; MP PMT 1989, 92] |
| A. | Aldolase |
| B. | Dehydrogenase |
| C. | Invertase |
| D. | Zymase |
| Answer» E. | |
| 426. |
Read the assertion and reason carefully: Assertion : Polynology is the study about pollen grain. Reason : It is also useful in plant taxonomy. |
| 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 | |
| 427. |
Where are hydrogen bonds important to life |
| A. | In ionic substance |
| B. | Between water molecules |
| C. | Between hydrogen atoms |
| D. | All of the above |
| Answer» C. Between hydrogen atoms | |
| 428. |
Which of the following is cultivated through vegetative propagation? |
| A. | Banana and Ginger |
| B. | Potato and Sugarcane |
| C. | Dahlia and Rose |
| D. | All of the above |
| Answer» E. | |
| 429. |
The person with Turner's syndrome has: |
| A. | 45 autosomes and X sex chromosome |
| B. | 44 autosomes and XYY sex chromosomes |
| C. | 45 autosomes and XYY sex chromosomes |
| D. | 44 autosomes and X sex chromosome |
| Answer» E. | |
| 430. |
Mongolism, Edward's syndrome and Patau's syndrome are due to: |
| A. | Autosomal abnormalities |
| B. | Allosomal abnormalities |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» B. Allosomal abnormalities | |
| 431. |
Bell-shaped polygonal pyramid indicates: |
| A. | high percentage of young individuals. |
| B. | moderate percentage of young individuals. |
| C. | low percentage of young individuals. |
| D. | low percentage of old individuals. |
| Answer» C. low percentage of young individuals. | |
| 432. |
Mark the correct identification from the following picture. |
| A. | 123Tropical forestTemperate forestConiferous forest |
| B. | Temperate forestTropical forestConiferous forest |
| C. | Temperate forestConiferous forestTropical forest |
| D. | Coniferous forestTropical forestTemperate forest |
| Answer» B. Temperate forestTropical forestConiferous forest | |
| 433. |
Addition of solute in the cell develops: |
| A. | Turgor pressure |
| B. | Osmotic pressure |
| C. | Diffusion pressure |
| D. | Water potential |
| Answer» C. Diffusion pressure | |
| 434. |
Commercially important fibres of cotton are |
| A. | Woody fibres of roots |
| B. | Bark fibres of stem |
| C. | Epidermal hairs of seeds |
| D. | Phloem fibres of roots |
| Answer» D. Phloem fibres of roots | |
| 435. |
Assertion : Microcyst of myxamoebae lacks cell wall. Reason : Microcyst is formed in sexual reproduction of slime moulds. |
| 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» F. | |
| 436. |
Penicillin antibiotic which effects bacterial [BHU 1989] |
| A. | DNA replication |
| B. | Protein synthesis |
| C. | Plasma membrane properties |
| D. | Peptidoglycon synthesis (cell wall) |
| Answer» E. | |
| 437. |
Red bone marrow are not found in: |
| A. | Ribs |
| B. | Vertebrae |
| C. | Central part of long bones |
| D. | Skull bones |
| Answer» D. Skull bones | |
| 438. |
In human beings, sex is determined [MP PMT 1990] |
| A. | Before fertilization of ovum |
| B. | During 6th week of foetal life when androgens are produced |
| C. | At the time of fertilization of ovum |
| D. | During 7th and 8th weeks of foetal life when gonads differentiate into testis and ovary |
| Answer» D. During 7th and 8th weeks of foetal life when gonads differentiate into testis and ovary | |
| 439. |
Xylem position in secondary xylem is [RPMT 1995] |
| A. | Exarch |
| B. | Endarch |
| C. | Mesarch |
| D. | None of these |
| Answer» E. | |
| 440. |
Ovule is inverted with body fused to funicle, micropyle lying close to hilum and facing the placenta. It is: |
| A. | Hemitropous |
| B. | Orthotropous |
| C. | Anatropous |
| D. | Campylotropous |
| Answer» D. Campylotropous | |
| 441. |
Polygonum type of embryo sac/typical female gametophyte of angiosperms is: |
| A. | 7-celled, 7-nucleate |
| B. | 7-celled, 8-nucleate |
| C. | 8-celled, 7-nucleate |
| D. | 8-celled, 8-nucleate |
| Answer» C. 8-celled, 7-nucleate | |
| 442. |
Which of the following elements has its end walls perforated [AIEEE 2004] |
| A. | Tracheid |
| B. | Vessel |
| C. | Fiber |
| D. | Scleried |
| Answer» C. Fiber | |
| 443. |
Study the figure showing graph of light intensity on the rate of photosynthesis. Column-I Column-II A. Limiting factor in region(1) I. Some factor other than light intensity is becoming the limiting factor B. (2) represents to II. Light is no longer C. (3) represents to III. Light intensity D. (4) represents to IV. Maximum rate of photosynthesis E. (5) represents to V. Saturation point for light intensity |
| A. | A-I; B-II; C-III; D-IV; E-V |
| B. | A-III; B-I; C-II; D-V; E-IV |
| C. | A-IV; B-II; C-V; D- III; E ?I |
| D. | A-V; B-IV; C-III; D-II; E-I |
| Answer» C. A-IV; B-II; C-V; D- III; E ?I | |
| 444. |
Absolute refractory period during nerve impulse conduction is the period of: |
| A. | Repolarisation |
| B. | Depolarisation |
| C. | Both repolarisation and depolarization |
| D. | Neither repolarisation nor depolarisation |
| Answer» B. Depolarisation | |
| 445. |
Area of cerebral cortex controlling vision is: |
| A. | Frontal lobe |
| B. | Parietal lobe |
| C. | Temporal lobe |
| D. | Occipital lobe |
| Answer» E. | |
| 446. |
Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-IIA.XanthiumI.Its flower opens at higher temperature.B.CrocusII.Earlier and higher obtained by keeping its seed at low temperature between 1 \[{}^\circ C\]and \[10{}^\circ C\]C.MilletIII.Growth regulator can be obtained from one of the parts of it.D.CoconutIV.It produces flower, when period of light available is less than critical period. |
| A. | A - IV; B - I; C - II; D - III |
| B. | A - IV; B - II; C - III; D - I |
| C. | A - IV; B - III; C - II; D - I |
| D. | A - I; B - II; C - III; D - IV |
| Answer» B. A - IV; B - II; C - III; D - I | |
| 447. |
Svedberg got noble price for which of the following discovery [AMU 2005] |
| A. | Ultra-centrifuge |
| B. | Electron microscope |
| C. | Phase contrast microscope |
| D. | None of these |
| Answer» B. Electron microscope | |
| 448. |
Consider the following statements and choose the correct answer from the options given below. (i) A dry a live seed still contains water. (ii) A mature maize plant absorbs about 3L water per day. (iii) A mustard plant take up water equal to its weight in about five hours. (iv) Water is not considered as the limiting factor for plant growth and productivity. |
| A. | (i), (ii), (iii) and (iv) |
| B. | (iv) and (ii) |
| C. | (i), (ii) and (iii) |
| D. | Only (iv) |
| Answer» D. Only (iv) | |
| 449. |
Tocopherol stands for: (Pb. PMT 2004) |
| A. | vitamin K |
| B. | vitamin A |
| C. | vitamin E |
| D. | vitamin C |
| Answer» D. vitamin C | |
| 450. |
Which of the following would not secrete a cuticle |
| A. | Root epidermis |
| B. | Leaf epidermis |
| C. | Xerophytes |
| D. | Stem epidermis |
| Answer» B. Leaf epidermis | |