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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.
| 651. |
Symbiotic bacteria present in the intestine of most primates which synthesize certain vitamins are: (WB-JEE 2007) |
| A. | Entamoeba histolytica |
| B. | Entamoeba coli |
| C. | Entamoeba gingivalis |
| D. | None of these |
| Answer» E. | |
| 652. |
If the cells of root in wheat plant have 42 chromosomes, then the no. of chromosome in ' the cell of pollen grain is: |
| A. | 14 |
| B. | 21 |
| C. | 28 |
| D. | 42 |
| Answer» C. 28 | |
| 653. |
Which of the following controls flowering I long day plants and sex expression in certain species? |
| A. | Auxin |
| B. | Cytokinin |
| C. | Gibberellin |
| D. | Ethylene |
| Answer» D. Ethylene | |
| 654. |
Humerous and muscles are connected with [CPMT 1993] |
| A. | Ligament |
| B. | Tendons |
| C. | Both of these |
| D. | None of these |
| Answer» E. | |
| 655. |
A genetic disease in many Africans which reduces the oxygen uptake by RBC is known as: |
| A. | Sickle-cell anaemia |
| B. | Anaemia |
| C. | Pernicious anaemia |
| D. | Haemophilia |
| Answer» B. Anaemia | |
| 656. |
Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-II A. Turner syndrome I. Trisomy B. Linkage II. AA+XO C. Y-chromosome III. Morgan D. Down?s syndrome IV. Testis determining factor |
| A. | A-II; B-I; C-IV; D-III |
| B. | A-IV; B-I; C-II; D-III |
| C. | A-IV; B-II; C-I; D-III |
| D. | A-II; B-III; C-IV; D-I |
| Answer» E. | |
| 657. |
Epithelial tissues arise from: |
| A. | Ectoderm |
| B. | Endoderm |
| C. | Mesoderm |
| D. | All of these |
| Answer» E. | |
| 658. |
Tapetal cells are: |
| A. | Haploid |
| B. | Polyploid |
| C. | Diploid |
| D. | Triploid |
| Answer» C. Diploid | |
| 659. |
Most of the neurons of our body are: |
| A. | Unipolar |
| B. | Bipolar |
| C. | Multipolar |
| D. | Pseudounipolar |
| Answer» D. Pseudounipolar | |
| 660. |
Meristematic cells have [Manipal 2005] |
| A. | Thick cell wall and large intercellular spaces |
| B. | Thick cell wall and no intercellular space |
| C. | Thin cell wall and large intercellular spaces |
| D. | Thin cell wall and no intercellular spaces |
| Answer» E. | |
| 661. |
Taxonomic hierarchy refers to: |
| A. | step-wise arrangement of all categories for classification of plants and animals. |
| B. | a group of senior taxonomists who decide the nomenclature of plants and animals. |
| C. | a list of botanists or zoologists who have worked on taxonomy of a species or group. |
| D. | classification of a species, based on fossil record. |
| Answer» B. a group of senior taxonomists who decide the nomenclature of plants and animals. | |
| 662. |
In which of the following situations an intercalary meristem can be present |
| A. | Apex of a stem |
| B. | Apex of a root |
| C. | Petiole and internode |
| D. | Lateral tissue (cortex etc.) |
| Answer» D. Lateral tissue (cortex etc.) | |
| 663. |
The rods and cones of the eye retinal layer are modified: |
| A. | Hair |
| B. | Unipolar neurons |
| C. | Bipolar neurons |
| D. | multipolar neurons |
| Answer» D. multipolar neurons | |
| 664. |
Read the assertion and reason carefully: Assertion : Extra whorl of calyx is called epicalyx. Reason : Epicalyx is present as inner series of calyx. |
| 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 | |
| 665. |
Which of the following statements are incorrect? (i) A dominant allele determines the phenotype when paired with a recessive allele. (ii) A recesive allele is weaker than a dominant allele. (iii) A recessive allele do not shows its effects when paired with a dominant allele. (iv) A dominant allele is always better for an organism. |
| A. | (ii), (i) and (iv) |
| B. | (ii) and (iv) |
| C. | (i), (ii) and (iii) |
| D. | (i), (iii) and (iv) |
| Answer» C. (i), (ii) and (iii) | |
| 666. |
Given pedigree shows that the trait is inherited as autosomal dominant. Trace the genotype of Mother and Father. |
| A. | Father AA, Mother aa |
| B. | Father AA, Mother Aa |
| C. | Father aa, Mother AA |
| D. | Father aa, Mother Aa |
| Answer» E. | |
| 667. |
Carcinogenic agent is [MP PMT 1994] |
| A. | X-ray radiation |
| B. | U.V. radiation |
| C. | Nicotine |
| D. | All the above |
| Answer» E. | |
| 668. |
Organisms which have cells but no distinct nucleus [EAMCET 1995] |
| A. | Bacteria |
| B. | Cyanobacteria |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 669. |
Seed coat is derived from: |
| A. | Pericarp |
| B. | Epicarp |
| C. | Integuments of ovule |
| D. | Nucellus |
| Answer» D. Nucellus | |
| 670. |
How many pollen grains will be formed after meiotic division in ten microspore mother cells? |
| A. | 10 |
| B. | 20 |
| C. | 40 |
| D. | 80 |
| Answer» D. 80 | |
| 671. |
Pollination by water occurs in: |
| A. | Ceratophyllum |
| B. | Zostera |
| C. | Lemna |
| D. | All of these |
| Answer» E. | |
| 672. |
The structure present in nature which is living and non-living both is |
| A. | Protista |
| B. | Monera |
| C. | Virus |
| D. | Bacteria |
| Answer» D. Bacteria | |
| 673. |
Vessels are absent in |
| A. | Teak wood |
| B. | Shisham wood |
| C. | Chir wood |
| D. | Sal wood |
| Answer» D. Sal wood | |
| 674. |
The first to isolate plant virus was [CPMT 1979; CBSE PMT 1993; BHU 1992] |
| A. | W.M. Stanley |
| B. | E. C. Stackmann |
| C. | A. K. Smith |
| D. | Ivanowski |
| Answer» B. E. C. Stackmann | |
| 675. |
Assertion : Gemmae formation in Funaria occurs in favourable condition. Reason : The gemmae form on the stem and leaves. |
| 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. | |
| 676. |
Usually chordates have red blood containing red blood corpuscles. The blood is red due to the presence of the following pigment [DPMT 1993; AFMC 1993] |
| A. | Myoglobin |
| B. | Anthocyanin |
| C. | \[\beta \]anthocyanin |
| D. | Haemoglobin |
| Answer» E. | |
| 677. |
Assertion : All primates have a commonancestry. Reason : The most primate was shrew like animals. |
| 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 | |
| 678. |
The process 'Amniocentesis' is the withdrawal of amniotic fluid during: |
| A. | Menopause |
| B. | Lactation |
| C. | Gestation |
| D. | Pregnancy |
| Answer» E. | |
| 679. |
All xylem elements when mature are dead except [CPMT 1986] |
| A. | Tracheids |
| B. | Vessels |
| C. | Xylem parenchyma |
| D. | Xylem fibres |
| Answer» D. Xylem fibres | |
| 680. |
In both transpiration and evaporation, water is lost in the form of vapour yet they differ, because: |
| A. | Both transpiration and evaporation are similar but the rate of water loss differs. |
| B. | Frequency of water loss is different in both of them. |
| C. | Transpiration is a physical process and evaporation is a physiological process. |
| D. | Transpiration is a physiological process and evaporation is a physical process. |
| Answer» E. | |
| 681. |
Perception of colour is possible among: |
| A. | Birds |
| B. | Reptiles |
| C. | Men |
| D. | Both [a] and [c] |
| Answer» E. | |
| 682. |
The theory where ratio between the number of X-chromosomes and number of complete sets of autosomes will determine the sex is known as [MP PMT 2002] |
| A. | Chromosome theory of sex determination |
| B. | Genic balance theory of sex determination |
| C. | Hormonal balance theory of sex determination |
| D. | Environmental sex determination theory |
| Answer» C. Hormonal balance theory of sex determination | |
| 683. |
In Spirogyra, ladder like structure is formed in [Bihar MDAT 1992] |
| A. | Lateral conjugation |
| B. | Fragmentation |
| C. | Palmella stage |
| D. | Scalariform conjugation |
| Answer» E. | |
| 684. |
In Opuntia, the function of phyotosynthesis is carried out by [APMEE 1981; DPMT 1982; CPMT 1984; AFMC 1996] |
| A. | Cladode |
| B. | Phylloclade |
| C. | Phyllode |
| D. | Bulb |
| Answer» C. Phyllode | |
| 685. |
Vermiform appendix is made up of |
| A. | Digestive tissue |
| B. | Respiratory tissue |
| C. | Excretory tissue |
| D. | Lymphatic tissue |
| Answer» E. | |
| 686. |
The innermost layer of cortex which shows casparian thickenings in its cells is called as [AIIMS 1984; CPMT 1999] |
| A. | Epidermis |
| B. | Endodermis |
| C. | Pericycle |
| D. | Exodermis |
| Answer» C. Pericycle | |
| 687. |
Which of the following statement(s) is/are correct about nervous system of cockroach? (i) It consists of a series of fused segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side. (ii) There are six ganglia lie in the thorax, and three in the abdomen. (iii) The sense organs are antennae, eyes, maxillary pulps, labial pulps and anal cerci etc. (iv) Each eye consists of about 5000 hexagonal ommatidia. |
| A. | Both (i) and (iii) |
| B. | Only (ii) |
| C. | Both (i) and (iv) |
| D. | All of the above |
| Answer» B. Only (ii) | |
| 688. |
Match the names given under Column -I with their relations given under column II, choose the answer which gives the correct combination of the alphabets of the two columns Column - I (Name) Column - II (Relations)ABombyx moriPDisease of mulberryBMorus albaqCentre where silkworm egg are produced and supplied CGrainagerSilk mothDPowdery mildewsMulberry plant tFreshly hatched silkworm[KCET 2000] |
| A. | \[A=q,\,B=r,\,C=s,D=t\] |
| B. | \[A=r,\,B=s,\,C=q,\,D=p\] |
| C. | \[A=r,\,B=q,C=t,\,\,D=s\] |
| D. | \[A=s,\,B=r,\,C=q,\,D\]= t |
| Answer» C. \[A=r,\,B=q,C=t,\,\,D=s\] | |
| 689. |
The complex tissues include [MP PMT 1993] |
| A. | Scleroids |
| B. | Sclerenchyma |
| C. | Secretory tissues |
| D. | Collenchyma |
| Answer» D. Collenchyma | |
| 690. |
Pseudomycelium is formed in [BHU 2002] |
| A. | Yeast |
| B. | Rhizophora |
| C. | Aspergillus |
| D. | Synchytrium |
| Answer» B. Rhizophora | |
| 691. |
Which of the following is true for vitamin C? (CPMT 2007) |
| A. | Also called as ascorbic acid |
| B. | Also called as fumaric acid |
| C. | Obtained from citrus fruits |
| D. | Both [a] and [c] |
| Answer» E. | |
| 692. |
Botanical name of species which cause white rust of cruciferae [RPMT 2002] |
| A. | Peronospora parasitica |
| B. | Puccinia graminis |
| C. | Pythium debaryanum |
| D. | Albugo candida |
| Answer» E. | |
| 693. |
Assertion : The mesophyll of Pinus shows no distinction as mesophyll and palisade. Reason : Parenchymatous cells are present in mesophyll of Pinus. |
| 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 | |
| 694. |
A parenchymatous cell which store ergastic substances (waste products) is [DPMT 1981; AMU 1983] |
| A. | Idioblast |
| B. | Phragmoplast |
| C. | Conidioplast |
| D. | None of these |
| Answer» B. Phragmoplast | |
| 695. |
Read the assertion and reason carefully: Assertion : Piper nigrum shows the presence of perisperm. Reason : The persistent nucellus is called perisperm. |
| 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 | |
| 696. |
The potent weed killer is: |
| A. | Gibberellin |
| B. | 2, 4-D |
| C. | Abscisic acid |
| D. | Ethylene |
| Answer» C. Abscisic acid | |
| 697. |
The most common type of spore produced during asexual reproduction of algae is: |
| A. | Aplanospore |
| B. | Endospore |
| C. | Zoospore |
| D. | Oospore |
| Answer» D. Oospore | |
| 698. |
Sphaerosomes have affinity for |
| A. | Sudan III |
| B. | Eosin stains |
| C. | Leishman's stain |
| D. | Giemso's stains |
| Answer» B. Eosin stains | |
| 699. |
In which of the following colourblindness is inherited [MP PMT 2000] |
| A. | In males only |
| B. | In females only |
| C. | In both males and females |
| D. | In none of the above |
| Answer» D. In none of the above | |
| 700. |
Starch is insoluble in water, yet it is accumulated in large quantities in potato tuber because: |
| A. | it is useful for storage. |
| B. | starch is synthesised in tubers. |
| C. | tubers respire slowly. |
| D. | it is translocated in the form of sugar from leaves. |
| Answer» E. | |