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.
| 251. |
Citrus thorn is actually modification of [APMEE 1995] |
| A. | Stem |
| B. | Branch |
| C. | Leaf |
| D. | Stipule |
| Answer» B. Branch | |
| 252. |
The sex chromosomes in females are [MP PMT 2002] |
| A. | XX |
| B. | XY |
| C. | YY |
| D. | XXY |
| Answer» B. XY | |
| 253. |
Lymph can be defined as [CPMT 1984] |
| A. | Blood minus RBCs |
| B. | Blood minus plasma |
| C. | Blood minus WBCs |
| D. | Corpuscles |
| Answer» B. Blood minus plasma | |
| 254. |
A fibre derived from a tracheid is |
| A. | Libriform fibre |
| B. | Fibre tracheid |
| C. | Wood fibre |
| D. | Bast fibre |
| Answer» C. Wood fibre | |
| 255. |
You are growing a bacterial population in a laboratory flask with a flow-through system that continuously replaces old culture medium with fresh medium without removing any bacteria. Which of the following graphs best predicts the growth of this population over time? |
| A. | A |
| B. | D |
| C. | B |
| D. | C |
| Answer» E. | |
| 256. |
Succulents occur in: |
| A. | Deserts |
| B. | Tundra |
| C. | Temperate deciduous forests |
| D. | Tropical rain forests |
| Answer» B. Tundra | |
| 257. |
Deficiency of vitamin A results in: |
| A. | scurvy |
| B. | rickets |
| C. | beri-beri |
| D. | xerophthalmia |
| Answer» E. | |
| 258. |
Connecting link between glycolysis and Krebs cycle is: |
| A. | Oxaloacetate |
| B. | PEP |
| C. | Pyruvate |
| D. | Acetyl CoA |
| Answer» E. | |
| 259. |
Conglobate gland is present in: |
| A. | Male cockraoch |
| B. | Female cockroach |
| C. | Earthworm |
| D. | Hydra |
| Answer» B. Female cockroach | |
| 260. |
Choose the correct |
| A. | Haversian canals are transverse canals |
| B. | Volkmann's canals are longitudinal canals |
| C. | Haversian canals are longitudinal whereas Volkmann's canals are transverse canals |
| D. | None of the above |
| Answer» D. None of the above | |
| 261. |
Which of the following are extreme halophiles and thermophiles |
| A. | Bacteria |
| B. | Cyanobacteria |
| C. | Archaebacteria |
| D. | Fungi |
| Answer» D. Fungi | |
| 262. |
Which one is hexose sugar [BCECE 2001] |
| A. | Mannose |
| B. | Galactose |
| C. | Both and |
| D. | Cellulose |
| Answer» D. Cellulose | |
| 263. |
Read the assertion and reason carefully: Assertion : Phylloclades are modified leaves. Reason : Phylloclades reduce transpiration. |
| 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. | |
| 264. |
Bulb of Allium cepa (Onion) is |
| A. | Underground modified bud |
| B. | Underground shoot |
| C. | Both correct |
| D. | Underground stem |
| Answer» D. Underground stem | |
| 265. |
Meristematic activity occurs at [CMC Vellore 1994] |
| A. | Bud |
| B. | Stem apex |
| C. | Leaf |
| D. | Root hair |
| Answer» C. Leaf | |
| 266. |
A plant living symbiotically inside another plant is [AFMC 1994] |
| A. | Saprophyte |
| B. | Endophyte |
| C. | Semiparasite |
| D. | Parasite |
| Answer» C. Semiparasite | |
| 267. |
Match the column-I with column-II and select the correct option. Column-I Column-II A. Cervical nerves I. 5 pairs B. Thoracic nerves II. 1pair C. Lumbar nerves III. 12 pairs D. Coccygeal nerves IV. 8 Pairs |
| A. | A- II; B- IV; C- I; D- III |
| B. | A- IV; B - III; C - I; D - II |
| C. | A- III; B - I; C - II; D - IV |
| D. | A- IV; B- I; C- II; D- III |
| Answer» C. A- III; B - I; C - II; D - IV | |
| 268. |
The mandibular nerve is the branch of which cranial nerve? |
| A. | II |
| B. | III |
| C. | V |
| D. | VI |
| Answer» D. VI | |
| 269. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : During late childhood period, the body parts show rapid growth rate. Reason : Thyroxine and STH both become functional in addition to thymosine hormone. |
| 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 | |
| 270. |
Unique character of Spirogyra vegetative cell is |
| A. | Cell wall is definite and thick |
| B. | Cell wall is hygroscopic |
| C. | Pyrenoid bodies are present |
| D. | Nucleus is having cytoplasmic strands |
| Answer» E. | |
| 271. |
What is the function of molecular oxygen in cellular respiration? |
| A. | It causes the breakdown of citric acid. |
| B. | To combine with glucose to produce carbon dioxide. |
| C. | To combine with carbon from organic molecules to produce carbon dioxide. |
| D. | To combine with hydrogen from organic molecules to produce water. |
| Answer» E. | |
| 272. |
Endothecium layer of anther lobes is present: |
| A. | Outside the epidermis |
| B. | inner to epidermis |
| C. | In the innermost layer |
| D. | in the middle region |
| Answer» C. In the innermost layer | |
| 273. |
Which is false about Asteraceae [MP PMT 1986] |
| A. | Cypsela fruit |
| B. | Syngenesious androecium |
| C. | Head inflorescence |
| D. | Hypogynous flower |
| Answer» E. | |
| 274. |
In cyanophage, the genetic material is [BHU 1983] |
| A. | RNA |
| B. | DNA |
| C. | RNA and DNA |
| D. | Protein |
| Answer» C. RNA and DNA | |
| 275. |
In oogamy, fertilisation involves: |
| A. | a large non-motile female gamete and a small non-motile male gamete. |
| B. | a large motile female gamete and a small non-motile male gamete. |
| C. | a small non-motile female gamete and a large motile male gamete |
| D. | a large non-motile female gamete and a small motile male gamete. |
| Answer» E. | |
| 276. |
A colourblind man has a colourblind sister but a normal brother than phenotype of its parents is [CPMT 1993] |
| A. | Father colourblind and mother normal |
| B. | Father normal and mother colourblind |
| C. | Father and mother both are colourblind |
| D. | Father and mother both are normal |
| Answer» B. Father normal and mother colourblind | |
| 277. |
The given diagram represents the sectional vie I of cochlea with few part labelled as 1, 2, 3 & 4. The movement of which marked label causes hair cell microvilli to bend back and forth. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 278. |
Cranial nerve showing maximum branching is: |
| A. | Trigeminal |
| B. | Vagus |
| C. | Optic |
| D. | Facial |
| Answer» B. Vagus | |
| 279. |
In the given figure of eye, few parts are labelled as 1, 2, 3 and 4. Select the option which shows the correct identification of the part with its characteristics. |
| A. | 1: Choroid, it contains ganglion cells, bipolar cells and photoreceptor cells. |
| B. | 2: Iris, it is responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina. |
| C. | 3: Blind spot, it is a yellowish pigmented spot called macula lutea with a central pit called the fovea. |
| D. | 4: Cornea, it is a transparent front part of the eye that covers the iris, pupil, and anterior chamber. |
| Answer» C. 3: Blind spot, it is a yellowish pigmented spot called macula lutea with a central pit called the fovea. | |
| 280. |
Which of the following isotope is non-radioactive [DPMT 1982, 84] |
| A. | \[{{C}^{14}}\] |
| B. | \[{{P}^{31}}\] |
| C. | \[{{H}^{3}}\] |
| D. | \[{{S}^{35}}\] |
| Answer» C. \[{{H}^{3}}\] | |
| 281. |
Water stomata are found in [CPMT 1986] |
| A. | Plants inhabiting humid region |
| B. | Plants inhabiting dry regions |
| C. | All plants |
| D. | Plants lacking normal stomata |
| Answer» B. Plants inhabiting dry regions | |
| 282. |
What will happen if all bacteria of intestine die? |
| A. | Total reabsorption of nutrient takes place in the body |
| B. | Digestive system works very fast |
| C. | Synthesis of vitamin B complex and K stop |
| D. | Irregular behaviour of man |
| Answer» D. Irregular behaviour of man | |
| 283. |
Deficiency of folic acid and vitamin \[{{B}_{12}}\] leads to: |
| A. | xerophthalmia |
| B. | sickle-cell anaemia |
| C. | microcytic anaemia |
| D. | megaloblastic anaemia |
| Answer» E. | |
| 284. |
Bacteria are considered as plants, because [CPMT 1972, 80, 84, 86, 94; NCERT 1980; MP PMT 1989; DPMT 1993; BHU 2005] |
| A. | These have a rigid cell wall |
| B. | They have a green colour |
| C. | They can reproduce |
| D. | They are present everywhere |
| Answer» B. They have a green colour | |
| 285. |
Read the assertion and reason carefully: Assertion : Achenial fruits are single seeded fruits. Reason : Capsular fruits are multiseeded fruits. |
| 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 | |
| 286. |
Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants? |
| A. | Violet and blue |
| B. | Blue and green |
| C. | Green and red |
| D. | Red and violet |
| Answer» B. Blue and green | |
| 287. |
Which of the bacteriophage is a virulent |
| A. | Coliphage M12 |
| B. | l phage |
| C. | T4 phage |
| D. | None of these |
| Answer» E. | |
| 288. |
Which of these is an example of conditioned reflex? |
| A. | Watering of mouth at the taste of food. |
| B. | Withdrawal of hand on touching a hot plate. |
| C. | Cycling. |
| D. | Flowing of tears while peeling- and cutting onions. |
| Answer» D. Flowing of tears while peeling- and cutting onions. | |
| 289. |
When a physician elicits the knee-jerk reflex by tapping deep tendons in the knee, the normal response is for the lower leg to swing forward. When this happens: |
| A. | Muscles in the back of the lower leg are contracting but that in the front are relaxing. |
| B. | Muscles in the front of the lower leg are contracting but that in the back are relaxing. |
| C. | Muscles in the back of the thigh are contracting but that in the front are relaxing. |
| D. | Muscles in the front of the thigh are contracting but that in the back are relaxing. |
| Answer» E. | |
| 290. |
Haustoria are found in [NCERT 1978] |
| A. | Symbionts |
| B. | Parasites |
| C. | Saprophytes |
| D. | All the above |
| Answer» C. Saprophytes | |
| 291. |
Vascular bundle is closed, when [Orissa JEE 2004] |
| A. | Cambium present |
| B. | Cambium absent |
| C. | Pericycle absent |
| D. | None of these |
| Answer» C. Pericycle absent | |
| 292. |
The tendency of genes to remain together during the process of inheritance is known as |
| A. | Sex linkage |
| B. | Linkage |
| C. | Differential inheritance |
| D. | Optional linkage |
| Answer» C. Differential inheritance | |
| 293. |
Basal cell of Ulothrix is [JIPMER 1999] |
| A. | Antheridium |
| B. | Meristematic |
| C. | Holdfast |
| D. | Zoogonidium |
| Answer» D. Zoogonidium | |
| 294. |
The term "New systematics" was introduced by: |
| A. | Bentham and Hooker |
| B. | Linnaeus |
| C. | Julian Huxley |
| D. | A.P. de Condolle |
| Answer» D. A.P. de Condolle | |
| 295. |
Which of the following has normal sex chromosomes? |
| A. | Down syndrome |
| B. | Klinefelter syndrome |
| C. | Turner syndrome |
| D. | Super female |
| Answer» B. Klinefelter syndrome | |
| 296. |
Harmful mutations does not get eliminated from gene pool because: |
| A. | they are recessive and carried by homozygous individuals. |
| B. | they are recessive and carried by heterozygous individuals. |
| C. | they are formed repeatedly. |
| D. | they show genetic drift. |
| Answer» C. they are formed repeatedly. | |
| 297. |
Colourless, unicellular, cell wall bound, spherical or rod-shaped micro-organism and lacking organized nucleus is called [CPMT 2004] |
| A. | Mycoplasma |
| B. | Virus |
| C. | Bacteria |
| D. | Cyanobacteria |
| Answer» D. Cyanobacteria | |
| 298. |
Which of the following are primary meristems |
| A. | Pleurome |
| B. | Protoderm |
| C. | Intercalary meristem |
| D. | All the above |
| Answer» E. | |
| 299. |
Tailed bacteriophages are [CBSE PMT 1995] |
| A. | Motile on surface of bacteria |
| B. | Non-motile |
| C. | Actively motile in water |
| D. | Motile on surface of plant leaves |
| Answer» C. Actively motile in water | |
| 300. |
The weak stemmed plants which can climb with the help of thorns, spines, prickles are |
| A. | Scramblers |
| B. | Stolons |
| C. | Straggling |
| D. | Lianas |
| Answer» B. Stolons | |