MCQOPTIONS
Saved Bookmarks
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.
| 14451. |
The cellular pool is formed by: |
| A. | inorganic molecules |
| B. | organic molecules |
| C. | all the molecules in dissolved or suspended state |
| D. | water |
| Answer» D. water | |
| 14452. |
Specificity of protein is due to: |
| A. | Types of amino acid |
| B. | Sequence of amino acid |
| C. | Number of amino acid |
| D. | Quantity ofamino acid |
| Answer» C. Number of amino acid | |
| 14453. |
Which of the following is not a wax? |
| A. | Tripalmitin |
| B. | Myricyi palmitate |
| C. | Myricyi cerotate |
| D. | Lanolin |
| Answer» B. Myricyi palmitate | |
| 14454. |
Cholesterol is a crucial molecule in animals as: |
| A. | it is necessary for survival. |
| B. | it is the energy source. |
| C. | it is helpful in hydrolysis of glycogen. |
| D. | it is a source of many vertebrate hormones and other steroids. |
| Answer» E. | |
| 14455. |
Which of the following is an amino acid, which is metabolised by the brain? |
| A. | Alanine |
| B. | Histidine |
| C. | Glycine |
| D. | Glutamic acid |
| Answer» E. | |
| 14456. |
Identify the graph labelling as per the statements given and choose the correct option. (i) Segment representing the energy of activation (ii) Segment representing the amount of free energy released by the reaction (iii) Transition state (iv) Segment would be the same regardless of whether the reaction were uncatalysed or catalysed. |
| A. | (i) - I (ii) - III (iii) - II (iv) ? IV |
| B. | (i) - I (ii) - II (iii) - III (iv) ? II |
| C. | (i) - I (ii) - III (iii) - II (iv) ? IV |
| D. | (i) - I (ii) - II (iii) - IV (iv) - III |
| Answer» C. (i) - I (ii) - III (iii) - II (iv) ? IV | |
| 14457. |
The structure of linolenic acid can be described |
| A. | 16 carbon, one double bond |
| B. | 18 carbon, one double bond |
| C. | 18 carbon, two double bonds |
| D. | 18 carbon, three double bonds |
| Answer» E. | |
| 14458. |
Phospholipids are important cell membrane constituents, because they: |
| A. | contain glycerol |
| B. | can form bilayers in water |
| C. | combine covalently with protein |
| D. | contain polar and non-polar portions |
| Answer» E. | |
| 14459. |
Which of the following is a non-reducing sugar? |
| A. | Maltose |
| B. | Trehalose |
| C. | Lactose |
| D. | Isomaltose |
| Answer» C. Lactose | |
| 14460. |
Sugar and amino acids are: |
| A. | Primary metabolites |
| B. | Secondary metabolites |
| C. | Feed stock |
| D. | Inoculum |
| Answer» B. Secondary metabolites | |
| 14461. |
The high energy bonds of ATP are present between: |
| A. | C - C |
| B. | C - O |
| C. | C - N |
| D. | O - P |
| Answer» E. | |
| 14462. |
Glycogen is stored in: |
| A. | Liver and muscles |
| B. | Liver only |
| C. | Muscles only |
| D. | Pancreas |
| Answer» B. Liver only | |
| 14463. |
Thymine is a [DPMT 1991] |
| A. | Enzyme |
| B. | Vitamin |
| C. | Pyrimidine |
| D. | Purine |
| Answer» D. Purine | |
| 14464. |
Which one of the following is widely distributed in a cell [CPMT 1977; MHCET 2000] |
| A. | DNA |
| B. | RNA |
| C. | Chloroplast |
| D. | Chromoplast |
| Answer» C. Chloroplast | |
| 14465. |
The distance between two nucleotides in DNA helix is |
| A. | \[\text{5}\overset{\text{o}}{\mathop{\text{A}}}\,\] |
| B. | \[\text{3}\text{.4}\overset{\text{o}}{\mathop{\text{A}}}\,\] |
| C. | \[\text{3}\text{.9}\overset{\text{o}}{\mathop{\text{A}}}\,\] |
| D. | \[30\overset{o}{\mathop{A}}\,\] |
| Answer» C. \[\text{3}\text{.9}\overset{\text{o}}{\mathop{\text{A}}}\,\] | |
| 14466. |
DNA is [CPMT 1980] |
| A. | Always double stranded |
| B. | Rarely single stranded |
| C. | Always single stranded |
| D. | Rarely double stranded |
| Answer» C. Always single stranded | |
| 14467. |
DNA is not present in one of the following [DPMT 1983; MP PMT 2003] |
| A. | Mitochondria |
| B. | Chloroplast |
| C. | Bacteriophage |
| D. | Tobacco mosaic virus |
| Answer» E. | |
| 14468. |
A ribose (but not deoxyribose) nucleotide is [CPMT 1987; Kerala PMT 2004] |
| A. | Cytosine - pentose sugar - phosphate |
| B. | Guanine - pentose sugar - phosphate |
| C. | Thymine - pentose sugar - phosphate |
| D. | Uracil - pentose sugar - phosphate |
| Answer» E. | |
| 14469. |
Koch's postulates are related to: |
| A. | Cell structure of bacteria |
| B. | Cell structure of micro-organisms |
| C. | Laws of diseases |
| D. | Origin of micro-organisms |
| Answer» D. Origin of micro-organisms | |
| 14470. |
Leishmania tropica produces: |
| A. | Sleeping sickness |
| B. | Malaria |
| C. | Dysentery |
| D. | Oriental sores |
| Answer» E. | |
| 14471. |
During the evolution of eukaryotes from prokaryotes, which of the following did not occur? |
| A. | Infolding of the flexible cell membrane. |
| B. | Loss of the cell wall. |
| C. | A switch from aerobic to anaerobic metabolism. |
| D. | Endosymbiosis of once free-living prokaryotes. |
| Answer» D. Endosymbiosis of once free-living prokaryotes. | |
| 14472. |
Which of the following statements is not correct for methanogens? |
| A. | They are archaebacteria. |
| B. | They live in marshy areas. |
| C. | Methane is their preferred carbon source. |
| D. | They are present in guts of several ruminant animals (cow, buffaloes) and produce biogas \[(C{{H}_{4}})\]from the dung of these animals. |
| Answer» D. They are present in guts of several ruminant animals (cow, buffaloes) and produce biogas \[(C{{H}_{4}})\]from the dung of these animals. | |
| 14473. |
In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria? |
| A. | Monera |
| B. | Fungi |
| C. | Plantae |
| D. | Protista |
| Answer» B. Fungi | |
| 14474. |
Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-II A. Chrysophytes I. Paramoecium B. Dinoflagellates II. Euglena C. Euglenoids III. Gonyaulax D. Protozoans IV Diatoms |
| A. | A-I B-III C-II D-IV |
| B. | A-II B-IV C-III D-I |
| C. | A-IV B-II C-III D-I |
| D. | A-IV B-III C-II D-I |
| Answer» E. | |
| 14475. |
Contractile vacuoles of Paramoecium are analogous to: |
| A. | Sweat glands of mammals |
| B. | Uriniferous tubules |
| C. | Gastrovascular cavity of Hydra |
| D. | Typhlosole of earthworm |
| Answer» C. Gastrovascular cavity of Hydra | |
| 14476. |
Yeast is an important source of: |
| A. | Vitamin C |
| B. | Vitamin B |
| C. | Vitamin A |
| D. | Vitamin D |
| Answer» C. Vitamin A | |
| 14477. |
Which of the following are the characters of Dinoflagellates? (i) Planktonic golden yellow algae with soap box like structure. (ii) Marine red biflagellated protista. (iii) Appear yellow, green, brown, blue and red in colour. (iv) Biflagellated organisms with pellicle. (v) Saprophytic or parasitic unicellular forms. |
| A. | (i), (ii) and (iii) only |
| B. | (ii), (iv) and (v) only |
| C. | (ii) and (iii) only |
| D. | (ii) and (v) only |
| Answer» D. (ii) and (v) only | |
| 14478. |
Match the type of protozoans given in column-I with their examples given in column-II and choose the correct option. Column-I (Type of Protozoans) Column-II (Examples) A. Amoeboid protozoans I. Paramoecium B. Ciliated protozoans II. Plasmodium C. Flagellated protozoans III. Amoeba D. Sporozoans IV. Trypanosoma |
| A. | A-I B-III C-IV D-II |
| B. | A-III B-I C-II D-IV |
| C. | A-III B-I C-IV D-II |
| D. | A-III B-IV C-I D-II |
| Answer» D. A-III B-IV C-I D-II | |
| 14479. |
Gram-negative cells stain pink because: |
| A. | they have specialised lipids in their cell walls. |
| B. | their peptidoglycan layer is thin. |
| C. | their peptidoglycan layer is thick. |
| D. | they are receptive to antibiotics. |
| Answer» C. their peptidoglycan layer is thick. | |
| 14480. |
National Park associated with Rhinoceros is: |
| A. | Kaziranga |
| B. | Ranthambore |
| C. | Corbett |
| D. | Valley of Flowers |
| Answer» B. Ranthambore | |
| 14481. |
In which state "Periyar National park" is present? |
| A. | Karnataka |
| B. | Maharashtra |
| C. | Madhya Pradesh |
| D. | Kerala |
| Answer» E. | |
| 14482. |
Which of the following is the most serious threat to biodiversity? |
| A. | Competition from exotic species |
| B. | Commercial harvesting |
| C. | Habitat destruction |
| D. | Overexploitation |
| Answer» D. Overexploitation | |
| 14483. |
Diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos Islands, as observed by Darwin, provides evidence for: |
| A. | intraspecific variations. |
| B. | intraspecific competition. |
| C. | interspecific competition. |
| D. | origin of species by natural selection |
| Answer» E. | |
| 14484. |
Which one of the following is the correct matching pair of a sanctuary and its main protected wild animals? |
| A. | North eastern Himalayan regionSambar |
| B. | SundarbansRhino |
| C. | GirLion |
| D. | KazirangaMusk deer |
| Answer» D. KazirangaMusk deer | |
| 14485. |
Match column-I with column-II and choose the correct option. Column-I Column-II A. Rhinoceros I. Bharatpur B. Tiger project in Kamataka II. Tropical evergreen forest C. Assemblage protection III. Kaziranga D. Silent valley IV. National park V. Bandipur |
| A. | A-V; B-III; C-I; D-IV |
| B. | A-II; B-IV; C-III; D-V |
| C. | A-IV; B-III; C-II; D-V |
| D. | A-III; B-V; C-I; D-II |
| Answer» E. | |
| 14486. |
An island ecosystem is said to be the most vulnerable. |
| A. | Due to its small size and lesser number of species. |
| B. | Due to its large size and large number of species. |
| C. | Due to its large size only. |
| D. | Due to its small size only. |
| Answer» B. Due to its large size and large number of species. | |
| 14487. |
Which of the following is endangered because of the loss of pollinating agents? |
| A. | Furbish's lousewort |
| B. | Madagascar rosy periwinkle |
| C. | American chestnut |
| D. | Hawaiian Lobelioids |
| Answer» E. | |
| 14488. |
Which of the following is not currently a major cause of the global reduction in biodiversity? |
| A. | Overexploitation |
| B. | Global warming |
| C. | Habitat destruction |
| D. | Introduction of foreign predators and disease |
| Answer» C. Habitat destruction | |
| 14489. |
Which one of these is an in-situ method of conservation? |
| A. | National park |
| B. | Botanical garden |
| C. | Tissue culture |
| D. | Genetic engineering |
| Answer» B. Botanical garden | |
| 14490. |
In an effort to save an endangered population, wildlife managers might try to enhance __ to help reduce __. |
| A. | Population fragmentation . . . biodiversity hot spots |
| B. | Biological magnification . . . population fragmentation |
| C. | Movement corridors . . . population fragmentation |
| D. | Biological magnification . . . source habitats |
| Answer» D. Biological magnification . . . source habitats | |
| 14491. |
Which one of the following is an example of ex situ conservation? |
| A. | Zoo |
| B. | Sanctuary |
| C. | National park |
| D. | Biosphere reserve |
| Answer» B. Sanctuary | |
| 14492. |
Hotspots are regions of high: |
| A. | Rarity |
| B. | Endemism |
| C. | Critically endangered population |
| D. | Diversity |
| Answer» C. Critically endangered population | |
| 14493. |
In the United States, the groups of organisms with the highest proportion of endangered or extinct species live in: |
| A. | Grasslands |
| B. | The deciduous forest biome |
| C. | Freshwater habitats |
| D. | Deserts |
| Answer» D. Deserts | |
| 14494. |
The Wildlife (Protection) Act 1972 was first amended in: |
| A. | 1991 |
| B. | 1995 |
| C. | 2001 |
| D. | 2007 |
| Answer» B. 1995 | |
| 14495. |
The most biodiversity rich zone in India: |
| A. | Gangetic planes |
| B. | Trans Himalayas |
| C. | Western Ghats |
| D. | Central India |
| Answer» D. Central India | |
| 14496. |
Red data book provides data on: |
| A. | Red flowered plants |
| B. | Red coloured fishes |
| C. | Endangered plants and animals |
| D. | Red eyed birds |
| Answer» D. Red eyed birds | |
| 14497. |
The taxa believed likely to join the endangered category in near future is called: |
| A. | Extinct |
| B. | Rare |
| C. | Vulnerable |
| D. | Out of danger |
| Answer» D. Out of danger | |
| 14498. |
The greatest threat to global biodiversity is: |
| A. | natural disasters such as storms. |
| B. | pollution. |
| C. | overexploitation of natural resources. |
| D. | human alteration of habitats. |
| Answer» E. | |
| 14499. |
Which of the following is threatened by illegal trade in wildlife products? |
| A. | Nile perch |
| B. | Elephants |
| C. | Key deer |
| D. | Galapagos tortoises |
| Answer» C. Key deer | |
| 14500. |
Those species whose populations have been seriously depleted and whose ultimate security is not assured are known as: |
| A. | Threatened species |
| B. | Endangered species |
| C. | Vulnerable species |
| D. | Rare species |
| Answer» C. Vulnerable species | |