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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.
| 12401. |
Apical dominance in plant is caused by [AIEEE 2004] |
| A. | High concentration of auxins in the terminal bud |
| B. | High concentration of gibberellins in the apical bud |
| C. | High concentration of auxins in the lateral bud |
| D. | Absence of auxins and gibberellins in the apical bud |
| Answer» B. High concentration of gibberellins in the apical bud | |
| 12402. |
Which fish gives birth to young ones |
| A. | Scoliodon |
| B. | Anabas |
| C. | Heteropneustes |
| D. | Catla |
| Answer» B. Anabas | |
| 12403. |
Degenerative changes occur during [CBSE PMT 1991] |
| A. | Metamorphosis only |
| B. | Parthenogenesis |
| C. | Ageing only |
| D. | Both in metamorphosis and ageing |
| Answer» E. | |
| 12404. |
Apical dominance in higher plants is due to [MP PMT 1986] |
| A. | Balance between auxin and cytokinin |
| B. | Enzyme activity and metabolism |
| C. | Carbohydrates |
| D. | Photoperiodism |
| Answer» B. Enzyme activity and metabolism | |
| 12405. |
The mean photosynthetic rates of\[{{C}_{3}}\]and\[{{C}_{4}}\]plants per\[d{{m}^{2}}\]per hour are respectively |
| A. | 10 mg and 20 mg |
| B. | 90 mg and 22 mg |
| C. | 22 mg and 75 mg |
| D. | 75 mg and 22 mg |
| Answer» D. 75 mg and 22 mg | |
| 12406. |
Assertion : Manganese is an activator of enzyme nitrite reductase. Reason : Manganese deficient cells prefer ammonia over nitrate. |
| 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 | |
| 12407. |
Renal portal system is absent in [BHU 1998] |
| A. | Amphibians |
| B. | Reptiles |
| C. | Amphibians and reptiles |
| D. | Birds |
| Answer» E. | |
| 12408. |
What type of poison is ethylene dichloride [MP PMT 1999] |
| A. | Stomach poison |
| B. | Contact poison |
| C. | Fumigant |
| D. | Biological control |
| Answer» D. Biological control | |
| 12409. |
The salinity of the oceans is [RPMT 1997] |
| A. | Increasing |
| B. | Decreasing |
| C. | Constant |
| D. | Decreasing now but was increasing in past |
| Answer» E. | |
| 12410. |
Assertion : Ribosomes protect mRNA from ribonuclease. Reason : mRNA is located in the gap between the two ribosomal subunits. |
| 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 | |
| 12411. |
Assertion : Slime moulds show alternation of generation. Reason : The sporangia bearing slime moulds represent haplophase. |
| 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 | |
| 12412. |
Which of the following is the characteristic of plants [MP PMT 2003] |
| A. | Glucose and cellulose |
| B. | Pyruvic acid and glucose |
| C. | Cellulose and starch |
| D. | Starch and pyruvic acid |
| Answer» D. Starch and pyruvic acid | |
| 12413. |
Read the assertion and reason carefully: Assertion : Mimordica roots look like necklace. Reason : Mimordica possess moniliform roots. |
| 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. | |
| 12414. |
Which molecule listed below is a product of fermentation of glucose by yeast [CPMT 1987; AIEEE 2003] |
| A. | \[{{({{C}_{6}}{{H}_{10}}{{O}_{5}})}_{n}}\] |
| B. | \[{{C}_{2}}{{H}_{5}}OH\] |
| C. | \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] |
| D. | \[C{{H}_{3}}OH\] |
| Answer» B. \[{{C}_{2}}{{H}_{5}}OH\] | |
| 12415. |
Assertion : Adiantum caudatom is called walking fern. Reason : It can reproduce by its 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» D. If both the assertion and reason are false | |
| 12416. |
Camel's hump is made up of [NCERT 1975, 77; CPMT 1977; DPMT 1985, 93; BHU 1985; MH-CET 2004] |
| A. | Skeletal tissue |
| B. | Muscular tissue |
| C. | Cartilage |
| D. | Adipose tissue |
| Answer» E. | |
| 12417. |
Which of the following is present in maximum amount in atmosphere [DPMT 2002] |
| A. | Oxygen |
| B. | Nitrogen |
| C. | Carbon dioxide |
| D. | Hydrogen |
| Answer» C. Carbon dioxide | |
| 12418. |
Assertion : Surface of skin is impervious to water. Reason : Surface of skin is covered by stratified cuboidal epithelium. |
| 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 | |
| 12419. |
Fusion of mature individuals which directly act as gametes, is called |
| A. | Isogamy |
| B. | Anisogamy |
| C. | Hologamy |
| D. | Autogamy |
| Answer» D. Autogamy | |
| 12420. |
Assertion : Primitive atmosphere was formed by the lightest atoms. Reason : The primitive atmosphere was reducing in nature. |
| 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 | |
| 12421. |
Homologous pairing in prophase I of meiosis I is called [MP PMT 2005] |
| A. | Synapsis |
| B. | Linkage |
| C. | Crossing over |
| D. | Syndesis |
| Answer» B. Linkage | |
| 12422. |
Which one of the following is used in the baking of bread [MP PMT 2004] |
| A. | Rhizopus stolonifer |
| B. | Zygosaccharomyces octosporous |
| C. | Saccharomyces cerevisiae |
| D. | Saccharomycodes ludwigii |
| Answer» D. Saccharomycodes ludwigii | |
| 12423. |
Kanha National Park is famous for [MP PMT 1995] |
| A. | Birds |
| B. | Rhinoceros |
| C. | Tigers |
| D. | Crocodiles |
| Answer» D. Crocodiles | |
| 12424. |
Assertion : \[{{C}_{4}}\]photosynthetic pathway is more efficient than the \[{{C}_{3}}\]pathway. Reason : Photorespiration is suppressed in \[{{C}_{4}}\] 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 | |
| 12425. |
The filaments associated with cilia and flagella are constituted by [AIIMS 1994; MP PMT 2000] |
| A. | Microtubules |
| B. | Microfilaments |
| C. | Microfibrils |
| D. | Microvilli |
| Answer» B. Microfilaments | |
| 12426. |
Assertion : Plants utilize 5-10% of the absorbed water in photosynthesis. Reason : Reduced leaf hydration decrease the photosynthesis. |
| 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. | |
| 12427. |
Heart pumps impure blood in case of [NCERT 1983] |
| A. | Shark |
| B. | Whale |
| C. | Frog |
| D. | Lizard |
| Answer» B. Whale | |
| 12428. |
The parts of the lung affected by ageing are |
| A. | Alveoli |
| B. | Pulmonary arteries |
| C. | Pulmonary veins |
| D. | All of these |
| Answer» E. | |
| 12429. |
Gila Monster Heloderma occurs in [MP PMT 2004] |
| A. | Africa |
| B. | America |
| C. | Central Asia |
| D. | China |
| Answer» C. Central Asia | |
| 12430. |
Nucleosomes are [BHU 1985; MP PMT 2003] |
| A. | Units of DNA |
| B. | Units of RNA |
| C. | Units of proteins |
| D. | Units of chromosomes |
| Answer» E. | |
| 12431. |
Assertion : Deuteromycetes lack sexual reproduction. Reason : Fungi show three type of reproduction asexual, sexual and vegetative. |
| 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 | |
| 12432. |
Which bird is symbol of `Bombay Natural History Society' |
| A. | Horn bill |
| B. | Egret |
| C. | Spoon bill |
| D. | Sun bird |
| Answer» C. Spoon bill | |
| 12433. |
Which of the following structures is present characteristically only in mammalian brain [MP PMT 2004] |
| A. | Corpus fibrosum |
| B. | Corpus striatum |
| C. | Corpus luteum |
| D. | Corpus callosum |
| Answer» E. | |
| 12434. |
The epidermis of the skin is derived from the germinal layer [CPMT 1992] |
| A. | Mesoderm |
| B. | Endoderm |
| C. | Ectoderm |
| D. | Neuro-endoderm |
| Answer» D. Neuro-endoderm | |
| 12435. |
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 | |
| 12436. |
The wood considered unfit as fuel is |
| A. | Bombax ceiba |
| B. | Madhuca indica |
| C. | Pinus roxburghii |
| D. | All of these |
| Answer» E. | |
| 12437. |
A normal spontaneous rate for a single gene is one mutation in every replication [Orissa JEE 2004] |
| A. | \[{{10}^{3}}\]to\[{{10}^{5}}\] |
| B. | \[{{10}^{5}}\]to\[{{10}^{7}}\] |
| C. | \[{{10}^{6}}\] to\[{{10}^{9}}\] |
| D. | \[{{10}^{7}}\]to\[{{10}^{10}}\] |
| Answer» D. \[{{10}^{7}}\]to\[{{10}^{10}}\] | |
| 12438. |
The third phase in the development of a mammal is [MP PMT 1997] |
| A. | Cleavage |
| B. | Gastrulation |
| C. | Gametogenesis |
| D. | Fertilization |
| Answer» B. Gastrulation | |
| 12439. |
If a cell has a chromosome number after first meiosis equal to 48. The chromosome number in the daughter cells after the completion of meiosis will be [BHU 2001] |
| A. | 48 |
| B. | 24 |
| C. | 12 |
| D. | 36 |
| Answer» B. 24 | |
| 12440. |
Animals of which order have tail in their larval forms |
| A. | Apoda |
| B. | Urodela |
| C. | Anura |
| D. | None of them |
| Answer» D. None of them | |
| 12441. |
One of the major difficulties in the biological control of insect pests is that [CBSE PMT 1995] |
| A. | The predator develops a preference to other diets and may itself become a pest |
| B. | The predator does not always survive when transferred to a new environment |
| C. | The method is less effective as compared with the use of insecticides |
| D. | The practical difficulty of introducing the predator to specific areas |
| Answer» B. The predator does not always survive when transferred to a new environment | |
| 12442. |
Assertion : Scolex with hooks are present in Taenia. Reason : The uterus is present is gravid proglottid. |
| 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 | |
| 12443. |
Assertion : Rhabditoid larva is the stage of Ascaris. Reason : The name rhbditoid is derived from another nematode genus Rhabditis. |
| 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 | |
| 12444. |
Gram belongs to the family [MP PMT 2001] |
| A. | Gramineae |
| B. | Papilionaceae |
| C. | Compositae |
| D. | Solanaceae |
| Answer» C. Compositae | |
| 12445. |
Read the assertion and reason carefully: Assertion : Secondary and tertiary roots are formed in acropetal manner. Reason : Rootlets are ultimate branches. |
| 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 | |
| 12446. |
Which of the following is not a characteristic of auxin |
| A. | Polar translocation |
| B. | Delay in abscission |
| C. | Apical dominance |
| D. | Induce lateral bud formation |
| Answer» E. | |
| 12447. |
A child receives [CPMT 1977; CBSE PMT 1995] |
| A. | 25% genes form his father |
| B. | 50% genes form his father |
| C. | 75% genes form his father |
| D. | 100% genes from his father |
| Answer» C. 75% genes form his father | |
| 12448. |
A complex polysaccharide produced from sucrose by the bacterium Leuconostoc mesenteroides is : [BHU 2004] |
| A. | Chitin |
| B. | Starch |
| C. | Cellulose |
| D. | Dextran |
| Answer» D. Dextran | |
| 12449. |
Which of the following animal can be formed without fertilization [CPMT 1974, 83] |
| A. | Human |
| B. | Hen |
| C. | Honey bee |
| D. | Ascaris |
| Answer» D. Ascaris | |
| 12450. |
Which of the following structures of a fish is homologous with the lung of a frog |
| A. | Gill pouch |
| B. | Swim bladder |
| C. | Stomach |
| D. | Booklungs |
| Answer» C. Stomach | |