MCQOPTIONS
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MCQOPTIONS
This section includes 1212 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
The pressure generated when water enters & inflates plant cells is called ___________ potential? |
| A. | Water |
| B. | Osmotic |
| C. | Pressure |
| D. | Solute |
| Answer» D. Solute | |
| 352. |
The point at which there is no net exchange of gases between leaves and atmosphere is known as_____________? |
| A. | Neutral point |
| B. | Compensation point |
| C. | Parallel point |
| D. | Competitive point |
| Answer» C. Parallel point | |
| 353. |
The plants which produce embryo but lack vascular tissues and seeds are placed in_________? |
| A. | bryophytes |
| B. | pteridophytes |
| C. | tracheophytes |
| D. | all of these |
| Answer» B. pteridophytes | |
| 354. |
The place of centromere where spindle fibres get attached is_________? |
| A. | Kinetochore |
| B. | Kinochore |
| C. | Centromere region |
| D. | all of these |
| Answer» B. Kinochore | |
| 355. |
The place of attachment of leaf with the shoot is called__________? |
| A. | Pith |
| B. | Pit |
| C. | Pulvinus |
| D. | Ecdysone |
| Answer» D. Ecdysone | |
| 356. |
The phylum chrordata comprise about how many species? |
| A. | 25,000 |
| B. | 50,000 |
| C. | 100,000 |
| D. | 10,00,000 |
| Answer» C. 100,000 | |
| 357. |
The percentage of light absorbed by the leaf is ___________? |
| A. | 20% |
| B. | 15% |
| C. | 10% |
| D. | 1% |
| Answer» E. | |
| 358. |
The partly digested food is stored in________in cockroach? |
| A. | Gizzard |
| B. | Crop |
| C. | Hepatic caeca |
| D. | Rectum |
| Answer» C. Hepatic caeca | |
| 359. |
The part of sporophyte which is called sporangium is____________? |
| A. | Capsule |
| B. | Foot |
| C. | Stalk |
| D. | None of these |
| Answer» B. Foot | |
| 360. |
The part of the brain that connects the two hemispheres of the brain is called____________? |
| A. | Corpus callosum |
| B. | Medulla oblongata |
| C. | Cerebral cortex |
| D. | Cerebellum |
| Answer» B. Medulla oblongata | |
| 361. |
The part of chloroplast where CO2 is fixed to manufacture sugar is__________? |
| A. | Stroma |
| B. | Grana |
| C. | Thylakoid |
| D. | Outer membrane |
| Answer» B. Grana | |
| 362. |
The organs of locomotion in annelids are__________? |
| A. | Muscles |
| B. | Hydrostatic skeleton |
| C. | Parapodia |
| D. | Setae |
| Answer» D. Setae | |
| 363. |
The organisms able to use sunlight directly as a source of energy are_____________? |
| A. | Plants |
| B. | Animals |
| C. | Omnivores |
| D. | Fungi |
| Answer» B. Animals | |
| 364. |
The opening and closing of stomata is directly controlled by the___________? |
| A. | Temperature |
| B. | pH |
| C. | Light |
| D. | None of these |
| Answer» D. None of these | |
| 365. |
The only promoter of leaf senescence in the following plant hormones is________________? |
| A. | Gibberellins |
| B. | Cytokinins |
| C. | Auxins |
| D. | Abscisic Acid |
| Answer» E. | |
| 366. |
The only group of algae having no flagellated motile cells at any stage is___________? |
| A. | Chrysophyta |
| B. | Phaeophyta |
| C. | Pyrrophyta |
| D. | Rhodophyta |
| Answer» E. | |
| 367. |
The one which is present in all living things |
| A. | Cell nucleus |
| B. | DNA or RNA |
| C. | Cell membrane |
| D. | Vacuole |
| Answer» C. Cell membrane | |
| 368. |
The one which is present in all living things is ___________? |
| A. | Cell nucleus |
| B. | DNA or RNA |
| C. | Cell membrane |
| D. | Vacuole |
| Answer» C. Cell membrane | |
| 369. |
The one which is present in all aerobic species is _________? |
| A. | Cytohrome c |
| B. | Cytochrome a |
| C. | Cytochrome a3 |
| D. | Cytochrome b |
| Answer» B. Cytochrome a | |
| 370. |
The one which is a weed killer is___________? |
| A. | IAA |
| B. | NAA |
| C. | 2 4-D |
| D. | GA |
| Answer» D. GA | |
| 371. |
The one which is not a globular protein__________? |
| A. | Anti Rh-antibody |
| B. | Enzyme |
| C. | Myosin |
| D. | Haemoglobin |
| Answer» D. Haemoglobin | |
| 372. |
The one which is incorrect pair? |
| A. | Sori – Indusium |
| B. | Arthrophytes – Jointed |
| C. | Dichotomous – Vernation |
| D. | Lycopods – Ground pries |
| Answer» D. Lycopods – Ground pries | |
| 373. |
The one which causes contraction of wall of the uterus during and after birth? |
| A. | ADH |
| B. | MSH |
| C. | Oxytocin |
| D. | Progesterone |
| Answer» D. Progesterone | |
| 374. |
The one which can tolerate highest external osmotic pressure is __________? |
| A. | Algae |
| B. | Amoeba |
| C. | Fungi |
| D. | Bacteria |
| Answer» D. Bacteria | |
| 375. |
The one which can break open a plasmid ring is__________? |
| A. | Ligase enzyme |
| B. | Primase enzyme |
| C. | Restriction endonuclease |
| D. | ATP-ase enzyme |
| Answer» B. Primase enzyme | |
| 376. |
The one that stores calcium is __________? |
| A. | Sarcolemma |
| B. | Sarcoplasm |
| C. | Sarcoplasmic reticulum |
| D. | Cytosol |
| Answer» D. Cytosol | |
| 377. |
The number of species of organisms currently known to science is? |
| A. | 3500000 |
| B. | 35000 |
| C. | 2500000 |
| D. | 25000000 |
| Answer» D. 25000000 | |
| 378. |
The number of daughter paramecia produced following conjugation is _______ ? |
| A. | 8 from one conjugant |
| B. | 8 from two conjugants |
| C. | 16 from two conjugants |
| D. | 8-16 from two conjugants |
| Answer» C. 16 from two conjugants | |
| 379. |
The number of chromosomes in human cell is_____________? |
| A. | 48 |
| B. | 44 |
| C. | 46 |
| D. | 26 |
| Answer» D. 26 | |
| 380. |
The number of calories required to raise the temperature of 1g of water from 15 to 16?C is called___________? |
| A. | Specific Heat of Vaporization |
| B. | Specific Heat capacity |
| C. | Caloric Heat |
| D. | Both A and C |
| Answer» C. Caloric Heat | |
| 381. |
The number carpels in our feet is__________? |
| A. | 7 |
| B. | 14 |
| C. | 16 |
| D. | 0 |
| Answer» E. | |
| 382. |
The normal range of the number of white blood cells in a microliter of blood is between _________ ? |
| A. | 2,500 and 09,300 |
| B. | 4,500 and 10,000 |
| C. | 4,900 and 12,000 |
| D. | None of these |
| Answer» C. 4,900 and 12,000 | |
| 383. |
The normal pH of human blood is____________? |
| A. | 6.4 |
| B. | 7.0 |
| C. | 7.4 |
| D. | 7.5 |
| Answer» D. 7.5 | |
| 384. |
The nephridia of earthworm open into the coelom by_________? |
| A. | Nephrostome |
| B. | Nephridiopore |
| C. | Flame cell |
| D. | Anus |
| Answer» B. Nephridiopore | |
| 385. |
The name Bacteriophage was coined by____________? |
| A. | Charles Chamberland |
| B. | Ivanowski |
| C. | Twort |
| D. | D Herelle |
| Answer» E. | |
| 386. |
The name animal is derived from the word__________? |
| A. | Anima |
| B. | Anemia |
| C. | Aname |
| D. | All of these |
| Answer» B. Anemia | |
| 387. |
The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane) |
| A. | Deffusion |
| B. | Osmosis |
| C. | Active transport |
| D. | None of these |
| Answer» C. Active transport | |
| 388. |
The most important photosynthetic pigment is ___________? |
| A. | Chlorophyll a |
| B. | Chlorophyll b |
| C. | Xanthophyll |
| D. | Carotenes |
| Answer» B. Chlorophyll b | |
| 389. |
The most important group of producers in marine ecosystem is of__________? |
| A. | Diatoms |
| B. | Euglenoids |
| C. | Dinoflagellates |
| D. | Brown algae |
| Answer» B. Euglenoids | |
| 390. |
The most important function of troponin is___________? |
| A. | To bind with actin |
| B. | To bind with tropomyosin |
| C. | To bind with Ca2+ ions |
| D. | All of these |
| Answer» E. | |
| 391. |
The most common type of asexual reproduction in the fungi is__________? |
| A. | fragmentation |
| B. | spore production |
| C. | budding |
| D. | binary fission |
| Answer» C. budding | |
| 392. |
The monosaccharide found in some bacteria and occurring rarely are______________? |
| A. | Trioses |
| B. | Hexoses |
| C. | Tetroses |
| D. | Pentoses |
| Answer» D. Pentoses | |
| 393. |
The molecules of living matter that provide building blocks are mostly based on: |
| A. | Carbon |
| B. | Nitrogen |
| C. | Hydrogen |
| D. | Ammonia |
| Answer» B. Nitrogen | |
| 394. |
The method of reproduction of new plants by cells instead of seed is known is:___________? |
| A. | Tissue culture |
| B. | Mutation |
| C. | Antibiosis |
| D. | Recombination |
| Answer» B. Mutation | |
| 395. |
The membrane of vacuoles is known as__________? |
| A. | Vacuoloplast |
| B. | Tonoplast |
| C. | Tanoplast |
| D. | All of these |
| Answer» C. Tanoplast | |
| 396. |
The mechanism of stomatal movement is related to the branch of Biology called__________? |
| A. | Taxonomy |
| B. | Physiology |
| C. | Morphology |
| D. | Anatomy |
| Answer» C. Morphology | |
| 397. |
The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called________? |
| A. | Homeostasis |
| B. | Hemostasis |
| C. | Osmoregualtion |
| D. | Thermoregulation |
| Answer» D. Thermoregulation | |
| 398. |
The mechanism for ATP synthesis is_____________? |
| A. | Chemosynthesis |
| B. | Photosynthesis |
| C. | Phosphorylation |
| D. | Chemiosmosis |
| Answer» E. | |
| 399. |
The maximum amount of oxygen which normal human blood absorbs and carries at sea level is ________ per 100 ml of blood. |
| A. | 10 ml |
| B. | 20 ml |
| C. | 30 ml |
| D. | 40 ml |
| Answer» C. 30 ml | |
| 400. |
The major constituent of blood plasma is___________? |
| A. | Protein |
| B. | NaCl |
| C. | Water |
| D. | Cholesterol |
| Answer» D. Cholesterol | |