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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.
| 9551. |
If the number of chromosomes, in the foot of fern embryo is 8 what should be the number in its spores [RPMT 1985] |
| A. | 4 |
| B. | 8 |
| C. | 16 |
| D. | 23 |
| Answer» B. 8 | |
| 9552. |
Ray fungi are [BHU 1995] |
| A. | Ascomycetes |
| B. | Basidiomycetes |
| C. | Actinomycetes |
| D. | Phycomycetes |
| Answer» D. Phycomycetes | |
| 9553. |
Most of the glands of the body are of |
| A. | Holocrine type |
| B. | Merocrine type |
| C. | Apocrine type |
| D. | None of these |
| Answer» C. Apocrine type | |
| 9554. |
Periodic appearance of malaria symptoms occurs due to periodic [AMU 1992] |
| A. | Entry of merozoites into erythrocytes |
| B. | Attack of liver cells by merozoites |
| C. | Formation of signet ring |
| D. | Release of pyrogen in blood |
| Answer» E. | |
| 9555. |
Contraction of sternohyal muscles during breathing in frog [CBSE PMT 1992] |
| A. | Closes glottis |
| B. | Opens the nostrils |
| C. | Raises floor of oral cavity |
| D. | Lowers floor of oral cavity |
| Answer» E. | |
| 9556. |
A tobacco plant which is heterozygous for albinism (a recessive character) is self-pollinated if 1200 seeds are subsequently germinated, how many of the seedlings would have the parental genotype [Manipal 1995] |
| A. | 300 |
| B. | 600 |
| C. | 900 |
| D. | 1200 |
| Answer» C. 900 | |
| 9557. |
Thick-walled and lignified with simple pits in walls and non-prosenchymatous cells without living protoplasm usually isodiametric or irregular in shape are [AMU 1990] |
| A. | Parenchyma |
| B. | Collenchyma |
| C. | Fibres |
| D. | Sclereids |
| Answer» E. | |
| 9558. |
In a trihybrid cross which plant will produce eight types of gametes |
| A. | Any plant of \[{{F}_{1}}\] generation |
| B. | 25% plants of \[{{F}_{1}}\] generation |
| C. | Recessive plant of \[{{F}_{1}}\] generation |
| D. | Any plant except a plant of \[{{F}_{1}}\] generation |
| Answer» B. 25% plants of \[{{F}_{1}}\] generation | |
| 9559. |
Which of the following statements is not true for retroviruses [CBSE PMT 2004] |
| A. | The gentic material in mature retroviruses in RNA |
| B. | Retroviruses are causative agents or certain kinds of cancer in man |
| C. | DNA is not present at any stage in the life cycle of retroviruses |
| D. | Retroviruses carry gene for RNA-dependent DNA polymerase |
| Answer» D. Retroviruses carry gene for RNA-dependent DNA polymerase | |
| 9560. |
Which one of the following is a correct statement [AIIMS 2005] |
| A. | "Bt" in "Bt-cotton" indicates that it is a genetically modified organism produced through biotechnology |
| B. | Somatic hybridization involves fusion of two complete plant cells carrying desired genes |
| C. | The anticoagulant hirudin is being produced from transgenic Brassica napus seeds |
| D. | "Flavr Savr" variety of tomato has enhanced the production of ethylene which improves its taste |
| Answer» B. Somatic hybridization involves fusion of two complete plant cells carrying desired genes | |
| 9561. |
Flagella of prokaryotic and eukaryotic cells differ in [CBSE PMT 2004] |
| A. | Microtubular organization and type of movement |
| B. | Microtubular organization and function |
| C. | Type of movement and placement in cell |
| D. | Location in cell and mode of unctioning |
| Answer» B. Microtubular organization and function | |
| 9562. |
The organisation of the shoot apex into tunica and corpus is determined largely on the basis of [JIPMER 1994] |
| A. | Rate of shoot tip growth |
| B. | Rate of cell division |
| C. | Planes of cell division |
| D. | Regions of meristematic activity |
| Answer» E. | |
| 9563. |
Primary source of allelic variation is [AIIMS 2005] |
| A. | Independent assortment |
| B. | Recombination |
| C. | Mutation |
| D. | Polyploidy |
| Answer» B. Recombination | |
| 9564. |
The most thoroughly studied of the known bacteria plant interactions is the [CBSE PMT 2004] |
| A. | Nodulation of Sebania stems by nitrogen fixing bacteria |
| B. | Plant growth stimulation by phosphate-solubilisig bacteria |
| C. | Cyanobacterial symbiosis with some aquatic ferms |
| D. | Gall formation on certain angiopserms by Agrobacterium |
| Answer» E. | |
| 9565. |
On the basis of plane of division, the growth forms of meristems have been distinguished as |
| A. | Mass, plate and rib meristems |
| B. | Outer, middle and inner meristems |
| C. | Peripheral and inner meristem |
| D. | Periclinal, anticlinal and radial meristem |
| Answer» E. | |
| 9566. |
The genome of transducing phages is [JIPMER 2001] |
| A. | Single stranded RNA |
| B. | Double stranded RNA |
| C. | Single stranded DNA |
| D. | Double stranded DNA |
| Answer» E. | |
| 9567. |
Root cap is a specialized protective structure found on the tips of the terrestrial vascular plants only. The cells of this root cap are |
| A. | Simple and usually forms a homogenous parenchymatous tissue of short-lived cells |
| B. | Simple and usually forms a homogenous collenchymatous tissue |
| C. | Complex and consists of outer collenchyma and inner sclerenchyma |
| D. | Complex and consists of outer suberised cells and inner parenchyma |
| Answer» B. Simple and usually forms a homogenous collenchymatous tissue | |
| 9568. |
Which of the following correctly defines a transgenic animal [CBSE PMT 1995] |
| A. | An animal which has foreign DNA and RNA in some of its cells because of an injection of DNA and RNA into the nucleus of the zygote from which it is developed |
| B. | An animal which has foreign DNA in all its cells because of an injection of DNA into the nucleus of the zygote from which it is developed |
| C. | An animal which has foreign DNA in some of its cells because of an injection of DNA into the nuclei of some of the cells of the blastocyst |
| D. | An animal which has foreign DNA in all its cells because of an injection of DNA into the nuclei of some of the cells in adulthood |
| Answer» C. An animal which has foreign DNA in some of its cells because of an injection of DNA into the nuclei of some of the cells of the blastocyst | |
| 9569. |
A single stranded DNA molecule is the genetic material of bacteriophage [BHU 1992, 95, 2000, DPMT 2003, 2004] |
| A. | T2 |
| B. | T4 |
| C. | × 174 |
| D. | l |
| Answer» D. l | |
| 9570. |
Which one of the following has least influence on cell elongation in a meristem |
| A. | Enzyme activity in the synthesis of new cellulose |
| B. | The availability of water to the tissue |
| C. | The water potential (diffusion pressure deficit) of the cell sap |
| D. | The synthesis of new DNA in the nucleus |
| Answer» E. | |
| 9571. |
Identical twins are produced when [BHU 1982; MP PMT 2001] |
| A. | One fertilized egg divided into 2 blastomeres and both separate |
| B. | One sperm fertilizes two eggs |
| C. | One egg fertilized with two sperms |
| D. | Two eggs are fertilized |
| Answer» B. One sperm fertilizes two eggs | |
| 9572. |
Which of the following diseases are known to becaused by viruses? (In this item one or more of the answers given may be correct. Decide which are correct and mark the answer sheet according to the code) Burkitt's lymphoma Adult T?cell leukemia Phenyl ketonuria Code [MP PMT 1993] |
| A. | 1, 2 and 3 are correct |
| B. | Only 1 and 2 are correct |
| C. | Only 2 and 3 are correct |
| D. | Only 1 and 3 are correct |
| Answer» C. Only 2 and 3 are correct | |
| 9573. |
Why velamen is not a hypodermal tissue ? Because |
| A. | It does not originate from dermatogen |
| B. | It originates from dermatogen |
| C. | It originates from ground meristem |
| D. | It originates from pleurome |
| Answer» C. It originates from ground meristem | |
| 9574. |
The primary biological importance of sex in organisms is that it [MP PMT 1990] |
| A. | Is essential for organismic reproduction |
| B. | Is essential for cellular reproduction |
| C. | Causes new mutations to occur in offspring |
| D. | Promotes genetic variability in offspring |
| Answer» E. | |
| 9575. |
Aphid Acyrthosiphon transmit which of the following causal agent |
| A. | Pea mosaic |
| B. | TMV |
| C. | Yellow vein mosaic of Bhindi |
| D. | None of these |
| Answer» B. TMV | |
| 9576. |
The function of bulliform cells is to |
| A. | Absorb water on the leaf epidermis |
| B. | Contain various enzymes for photosynthesis |
| C. | Reduce the rate of transpiration |
| D. | Support the epidermal cells where they are present |
| Answer» D. Support the epidermal cells where they are present | |
| 9577. |
If gene exchange rate is 30% of the two linked genes, then the distance between these two genes is |
| A. | 30 unit |
| B. | 15 unit |
| C. | 60 unit |
| D. | 45 unit |
| Answer» B. 15 unit | |
| 9578. |
In lysogenic state viral DNA |
| A. | Undergoes disintegration |
| B. | Remains persistant and attached to bacterial DNA |
| C. | Both co-exist separately in the same cell |
| D. | None of these |
| Answer» C. Both co-exist separately in the same cell | |
| 9579. |
Grafting is not possible in monocots because they [CPMT 1973, 75, 79, 81, 83; AMU 1989; BHU 1991, 95; MP PMT 1996] |
| A. | Have scattered vascular bundles |
| B. | Have parallel venation |
| C. | Are herbaceous |
| D. | Lack cambium |
| Answer» E. | |
| 9580. |
The process of genetic mutation is [MP PMT 2002] |
| A. | Reversible |
| B. | Irreversible |
| C. | Partially reversible |
| D. | Continuous |
| Answer» C. Partially reversible | |
| 9581. |
In phage (plaque) culture [CMC Vellore 1993] |
| A. | Only protein of virus enters and multiplies |
| B. | Only DNA of virus enters the bacterium and multiplies |
| C. | Whole virus enters the bacterium and multiplies |
| D. | None of these |
| Answer» C. Whole virus enters the bacterium and multiplies | |
| 9582. |
Match list I with List II and select the correct answer using code given below [MP PMT 2001] List I (syndrome) (1) Patau's syndrome (2) Kline-Felter's syndrome (3) Down's syndrome (4) Turner's syndrome List II (Chromosomal abnormality) 44 + XXY = 47 44 + X = 45 46 + 1 = 47, Chromosome 13th 46 + 1 = 47, Chromosome 21st Code |
| A. | \[\overset{1}{\mathop{A}}\,\,\,\overset{2}{\mathop{B}}\,\,\,\overset{3}{\mathop{C}}\,\,\,\overset{4}{\mathop{D}}\,\] |
| B. | \[\overset{1}{\mathop{D}}\,\,\,\overset{2}{\mathop{C}}\,\,\,\overset{3}{\mathop{B}}\,\,\,\overset{4}{\mathop{A}}\,\] |
| C. | \[\overset{1}{\mathop{C}}\,\,\,\overset{2}{\mathop{B}}\,\,\,\overset{3}{\mathop{D}}\,\,\,\overset{4}{\mathop{A}}\,\] |
| D. | \[\overset{1}{\mathop{C}}\,\,\,\overset{2}{\mathop{A}}\,\,\,\overset{3}{\mathop{D}}\,\,\,\overset{4}{\mathop{B}}\,\] |
| Answer» E. | |
| 9583. |
A substance (low molecular weight protein) produced by host cells in response to viral infection and protect other cells against further viral infection is [AIIMS 1982; MP PMT 1989] |
| A. | Phytotoxin |
| B. | Antibody |
| C. | Interferon |
| D. | Hormone |
| Answer» D. Hormone | |
| 9584. |
Cladodes are common among [RPMT 1985; AMU 1999] |
| A. | Liliaceae/Asparagus and Ruscus |
| B. | Opuntia and Casurina |
| C. | Cactus |
| D. | Euphorbia |
| Answer» B. Opuntia and Casurina | |
| 9585. |
What is the value of RQ if 192 gms of\[{{O}_{2}}\]is consumed and 264 gms of \[C{{O}_{2}}\]is produced |
| A. | Less than one |
| B. | More than one |
| C. | Zero |
| D. | Unity |
| Answer» E. | |
| 9586. |
What is common between photosynthesis and respiration [BHU 1995; AFMC 1995; MP PMT 1996; Haryana PMT 2005] |
| A. | Cytochrome |
| B. | Light |
| C. | \[{{H}_{2}}O\] |
| D. | Temperature |
| Answer» B. Light | |
| 9587. |
Deficiency of which of the following elements checks the cell division of cambium but cell elongation continues |
| A. | Calcium |
| B. | Sodium |
| C. | Manganese |
| D. | Boron |
| Answer» E. | |
| 9588. |
The most important property of an enzyme is its |
| A. | Composition |
| B. | Thermal denaturation |
| C. | Specificity |
| D. | Solubility |
| Answer» D. Solubility | |
| 9589. |
In ferns, antherozoids are [CPMT 1981, 84, 87, 89, 94; BHU 1986, 90] |
| A. | Coiled and multiflagellate |
| B. | Coiled and biflagellate |
| C. | Sickle shaped and biflagellate |
| D. | Sickle shaped and multiflagellate |
| Answer» B. Coiled and biflagellate | |
| 9590. |
No need of water for fertilization in [RPMT 1995] |
| A. | Ulothrix |
| B. | Albugo |
| C. | Bryophyta |
| D. | Pteridophyta |
| Answer» C. Bryophyta | |
| 9591. |
Plasmodium, the malarial parasite, belongs to class [CBSE PMT 1990] |
| A. | Sarcodina |
| B. | Ciliata |
| C. | Sporozoa |
| D. | Dinophyceae |
| Answer» D. Dinophyceae | |
| 9592. |
An average weight of bacterium is about |
| A. | \[0.2\times {{10}^{10}}gm\] |
| B. | \[0.2\times {{10}^{8}}gm\] |
| C. | \[0.2\times {{10}^{12}}gm\] |
| D. | \[0.2\times {{10}^{9}}gm\] |
| Answer» 3orr53t 1nsw5r:. \[0.2\times {{10}^{9}}gm\] | |
| 9593. |
In a certain plant, red flowers (R) are dominant to white flowers (r) and tallness (T) is dominant to dwarfness (t). A heterozygous plant (RrTt) is backcrossed with a double recessive plant (rrtt). If the gene loci for colour and size and situated very close together on the same chromosome, the expected percentage of offsprings could be approximately |
| A. | tall red tall white dwarf red dwarf white 25% 25% 25% 25% |
| B. | 49%, 49% 1% 1% |
| C. | 49% 1% 1% 49% |
| D. | 1% 1% 49% 49% |
| Answer» D. 1% 1% 49% 49% | |
| 9594. |
There are several ways of looking at living thing, one which is at the molecular level and analytical level with regard to life could vary nearly come to [CPMT 1973] |
| A. | Result of Newtonian laws |
| B. | Matter energy interaction |
| C. | Matter velocity relationship |
| D. | Physical expression of moment of mass |
| Answer» C. Matter velocity relationship | |
| 9595. |
A timber merchant told to the customer that log of wood he is purchasing belongs to 20 years old tree. He did so by |
| A. | Measuring wood log |
| B. | Counting annual rings |
| C. | Counting cork layers |
| D. | Measuring breadth of wood |
| Answer» C. Counting cork layers | |
| 9596. |
Euploidy is best explained by [Pb. PMT 1999] |
| A. | Exact multiples of a haploid set of chromosomes |
| B. | One chromosome less than the haploid set of chromosomes |
| C. | One chromosome more than the haploid set of chromosomes |
| D. | One chromosome more than the diploid set of chromosomes |
| Answer» B. One chromosome less than the haploid set of chromosomes | |
| 9597. |
Which one of the following statements is correct [MP PMT 1996] |
| A. | Viruses are obligate parasites |
| B. | All fungi are pathogenic |
| C. | All algae are eucaryotic |
| D. | Bacteria are always harmful to mankind |
| Answer» B. All fungi are pathogenic | |
| 9598. |
A nail is driven into the trunk of a 30 year old tree at a point 1 meter above the soil level. The tree grows in height at the rate of 0.5 meters a year. After three years, the nail will be [Kerala PMT 2004] |
| A. | 1 meter above the soil |
| B. | 1.5 meter above the soil |
| C. | 2 meters above the soil |
| D. | 2.5 meters above the soil |
| Answer» B. 1.5 meter above the soil | |
| 9599. |
Transition type of gene mutation is caused when [MP PMT 1997] |
| A. | GC is replaced by TA |
| B. | CG is replaced by GC |
| C. | AT is replaced by CG |
| D. | AT is replaced by GC |
| Answer» E. | |
| 9600. |
'Viroids' differ from 'viruses' in being [BHU 1994] |
| A. | Naked RNA molecules only |
| B. | Naked DNA molecules only |
| C. | Naked DNA packaged with viral genome |
| D. | Satellite RNA packaged with viral genome |
| Answer» B. Naked DNA molecules only | |