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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.
| 751. |
Mosses are: |
| A. | upright and radial in symmetry |
| B. | leafy |
| C. | green |
| D. | All of the above |
| Answer» E. | |
| 752. |
Select the correct order of endosperm types. |
| A. | Cellular, helobial, free nuclear |
| B. | Cellular, free nuclear, helobial |
| C. | Helobial, free nuclear, cellular |
| D. | Free nuclear, cellular, helobial |
| Answer» D. Free nuclear, cellular, helobial | |
| 753. |
Bacteria whose cell has only a curve/comma is [CPMT 1990, 93; EAMCET 1995] |
| A. | Vibrio |
| B. | Cocci |
| C. | Spirilli |
| D. | Bacilli |
| Answer» B. Cocci | |
| 754. |
Life span of adult 'Bombyx mori' is |
| A. | 2 days |
| B. | 6 days |
| C. | 8 days |
| D. | 3-4 days |
| Answer» E. | |
| 755. |
Which of the following is related to heart diseases? |
| A. | Turner's syndrome |
| B. | Edward's syndrome |
| C. | Cushing's syndrome |
| D. | Patau's syndrome |
| Answer» E. | |
| 756. |
In Drosophila XXY represents a female but in human it is an abnormal male. It shows that: |
| A. | Y-chromosome is essential for male sex in human. |
| B. | Y-chromosome is essential for female sex determination in Drosophila. |
| C. | Y-chromosome is not essential for male sex determination in human. |
| D. | All of the above |
| Answer» B. Y-chromosome is essential for female sex determination in Drosophila. | |
| 757. |
Identify the type of inheritance shown in the given figure. |
| A. | Dominant X-linked |
| B. | Recessive X-linked |
| C. | Dominant Y-linked |
| D. | Recessive Y-linked |
| Answer» B. Recessive X-linked | |
| 758. |
Which of the following do not have stomata [AIIMS 2000] |
| A. | Xerophytes |
| B. | Mesophytes |
| C. | Hydrophytes |
| D. | Submerged hydrophytes |
| Answer» E. | |
| 759. |
Least constancy of shape is shown by [CPMT 1978] |
| A. | Epithelial cells |
| B. | White blood corpuscles |
| C. | Red blood corpuscles |
| D. | Blood platlets |
| Answer» C. Red blood corpuscles | |
| 760. |
Why the cells of a permanent tissue do not divide? Because they are |
| A. | Dead |
| B. | Anucleate |
| C. | Arrested at G1 stage |
| D. | Arrested at prophase |
| Answer» D. Arrested at prophase | |
| 761. |
Assertion : Sporogonium of Riccia is totally dependent on the gametophyte. Reason : Sporogonium of Marchantia is partly dependent on the gametophyte. |
| 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 | |
| 762. |
Asexual reproduction in Spirogyra |
| A. | Has not been recorded |
| B. | Takes place by formation of zoospores |
| C. | Takes place by formation of aplanospores |
| D. | Takes place by formation of hypnospores |
| Answer» D. Takes place by formation of hypnospores | |
| 763. |
Enzyme concerned with transfer of electrons are: |
| A. | Hydrolase |
| B. | Dehydrogenase |
| C. | Transaminase |
| D. | Protease |
| Answer» C. Transaminase | |
| 764. |
The root apex is subterminal because it [Kashmir MEE 1995] |
| A. | Is covered by tunica cells |
| B. | Is covered by root hairs |
| C. | Has many corpus cells |
| D. | Is covered by root cap |
| Answer» E. | |
| 765. |
Thousand of year old Mummies are still in their condition as they were before due to non- destruction of: |
| A. | Yellow elastin fibres |
| B. | White elastin fibres |
| C. | Collagen fibres |
| D. | Veins |
| Answer» B. White elastin fibres | |
| 766. |
Read the assertion and reason carefully: Assertion : Many plants are propagated vegetatively even though they bear seeds. Reason : Potatos multiply by tubers, apple by cutting. [AIIMS 2001] |
| 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 | |
| 767. |
Flowers showing omithophily, represent few characteristics like: |
| A. | Blue flower with nectaries at base of corolla. |
| B. | Red sweet scented flower with nectaries. |
| C. | Bright red flower into thick inflorescence. |
| D. | White flowers with fragrance. |
| Answer» B. Red sweet scented flower with nectaries. | |
| 768. |
Fimbriae are |
| A. | Organs of adhesion |
| B. | Antigenic |
| C. | Organs which form conjugation tube through which genetic material is transferred from donor to recipient cell |
| D. | All the above |
| Answer» B. Antigenic | |
| 769. |
Algae and other submerged plants bounce in water during day time and sink at night, because: |
| A. | They come upto enjoy some time. |
| B. | They lose weight at night. |
| C. | They become buoyant due to accumulation of \[{{O}_{2}}\] as a result of photosynthesis. |
| D. | They become light due to food material accumulation. |
| Answer» D. They become light due to food material accumulation. | |
| 770. |
Two offspring developed in the same uterus but from fertilization of two different ova are [AFMC 2002] |
| A. | Dizygotic twins |
| B. | Monozygotic twin |
| C. | Fraternal twins |
| D. | Both (a) and (c) |
| Answer» E. | |
| 771. |
In free floating plant, the stomata are [AFMC 2000] |
| A. | Absent |
| B. | Present on upper surface |
| C. | Present on both the surface |
| D. | Present on lower surface |
| Answer» C. Present on both the surface | |
| 772. |
Parthenocarpic tomato fruits can be produce |
| A. | Raising the plants from vernalised seeds. |
| B. | Treating the plants with phenylmercuric acetate. |
| C. | Removing androecium of flowers before pollen grains are released. |
| D. | Treating the plants with low concentrations of gibberellic acid and auxins. |
| Answer» E. | |
| 773. |
Which of the following is known as pond scum? |
| A. | Volvox |
| B. | Ulothrix |
| C. | Nostoc |
| D. | Spirogyra |
| Answer» E. | |
| 774. |
The outer covering of non-myelinatcd neurons in brain is: |
| A. | Neurilemma |
| B. | Axolemma |
| C. | Sarcolemma |
| D. | Oolemma |
| Answer» E. | |
| 775. |
Collenchyma tissue is characterized by |
| A. | Elongated cells with thickening at the corners |
| B. | Isodiametric cells with thickening all over the walls |
| C. | Isodiametric cells with deposits of cellulose and pectin at the corners |
| D. | Elongated cells with deposits of cellulose and pectin all over the walls |
| Answer» B. Isodiametric cells with thickening all over the walls | |
| 776. |
In the buccal cavity slide cell of an individual we get a dark stained body near nuclear membrane. The genotype of the individual may be [DPMT 1983] |
| A. | XX |
| B. | XY |
| C. | XYY |
| D. | XXX |
| Answer» B. XY | |
| 777. |
Read the assertion and reason carefully: Assertion : Citrus is a palmate compound leaf. Reason : Citrus has single functional leaflet. |
| 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 | |
| 778. |
.......................are thick walled spores produced by Rhizopus which are capable of withstanding unfavourable conditions? |
| A. | Chlamydospores |
| B. | Zoospores |
| C. | Oidia |
| D. | Sporangiospores |
| Answer» B. Zoospores | |
| 779. |
Assertion : The interval between pollination and fertilization is about 4 months in Cycas. Reason : Cycas show retention of swimming sperm. |
| 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 | |
| 780. |
Spleen is [BVP 2001] |
| A. | Lymphoid |
| B. | Haemopoitic |
| C. | Celluloid |
| D. | Reproductive |
| Answer» B. Haemopoitic | |
| 781. |
Pellagra is caused due to prolonged deficiency of: (CMC, Vellore 2003; BV Pune 2004; AMU 2006; DUMET 2009; WB-JEE 2009) |
| A. | Niacin |
| B. | Thiamine |
| C. | Folic acid |
| D. | Ascorbic acid |
| Answer» B. Thiamine | |
| 782. |
Which is present in vascular bundles of gymnosperms [RPMT 1999] |
| A. | Tracheids |
| B. | Vessels |
| C. | Companion cells |
| D. | All of these |
| Answer» B. Vessels | |
| 783. |
Which of the following vitamin is a steroid synthesized from cholesterol? |
| A. | Vitamin A |
| B. | Vitamin B |
| C. | Vitamin C |
| D. | Vitamin D |
| Answer» E. | |
| 784. |
The rate of photosynthesis of a freshwater plant is measured using five spectral colours. Which sequence of colours would give an increasing photosynthetic response? smallest\[\to \]largest response |
| A. | Blue Green Yellow Orange Red |
| B. | Green Yellow Orange Red Blue |
| C. | Red Orange Yellow Green Blue |
| D. | Yellow Green Orange Blue Red |
| Answer» C. Red Orange Yellow Green Blue | |
| 785. |
On the basis of host attacked viruses are classified into [MP PMT 1995] |
| A. | Two types |
| B. | Three types |
| C. | Four types |
| D. | Five types |
| Answer» C. Four types | |
| 786. |
The difference in phloem of gymnosperms and angiosperms is due to [RPMT 2002] |
| A. | Parenchyma |
| B. | Sieve cell |
| C. | Companion cell |
| D. | Fibres |
| Answer» D. Fibres | |
| 787. |
Read the assertion and reason carefully: Assertion : China rose and rose both bear stipules. Reason : They are of adnate types. |
| 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 | |
| 788. |
During which stage in the complete oxidation of glucose are the highest number of energy deriving molecules (ATP) formed from ADP: |
| A. | Conversion of pyruvic acid to acetyl Co A |
| B. | Electron transport chain |
| C. | Glycolysis |
| D. | Kreb's cycle |
| Answer» C. Glycolysis | |
| 789. |
In an electron transport chain in terminal oxidation the cytochrome which donates electrons to \[{{O}_{2}}\] is: |
| A. | Cytochrome b |
| B. | Cytochrome c |
| C. | Cytochrome \[{{a}_{3}}\] |
| D. | Cytochrome a |
| Answer» D. Cytochrome a | |
| 790. |
Bulbil is a modification of |
| A. | Underground stem |
| B. | Bases of leaves |
| C. | Buds |
| D. | Radicle |
| Answer» D. Radicle | |
| 791. |
Which one is correctly matched: (CBSE 2001; Uttarakhand PMT 2007; BV Pune 2008) |
| A. | Vitamin A\[-\]Thiamine |
| B. | Vitamin B\[-\]Calciferol |
| C. | Vitamin D\[-\]Riboflavin |
| D. | Vitamin E\[-\]Tocopherol |
| Answer» E. | |
| 792. |
Florigen is produced in the region of: |
| A. | Leaves |
| B. | Fruit |
| C. | Root |
| D. | Trunk |
| Answer» B. Fruit | |
| 793. |
Bulliform or motor cells are present in [RPMT 1987] |
| A. | Dicot stem |
| B. | Upper epidermis of dicot leaves |
| C. | Lower epidermis of monocot leaves |
| D. | Upper epidermis of monocot leaves |
| Answer» E. | |
| 794. |
Which among the following is the real product of the honey bee? |
| A. | Pollen |
| B. | Bee wax |
| C. | Honey |
| D. | Propolis |
| Answer» C. Honey | |
| 795. |
Scutellum is present in the embryo of: |
| A. | Pea |
| B. | Ranunculus |
| C. | Triticum |
| D. | None of these |
| Answer» D. None of these | |
| 796. |
Why surgical instruments are boiled in water before use [CPMT 1980] |
| A. | For killing the pathogens present on them |
| B. | So that doctors can use them easily |
| C. | Provides pleasure to the patient |
| D. | All the saprophytes die on the operative surface |
| Answer» B. So that doctors can use them easily | |
| 797. |
Which one of the following organisms may respire in the absence of oxygen [MP PMT 2002] |
| A. | Azotobacter |
| B. | Clostridium |
| C. | Rhizobium |
| D. | Lactobacillus |
| Answer» C. Rhizobium | |
| 798. |
In pteridophyta and gymnosperms which cells are present in place of companion cell |
| A. | Sclereids |
| B. | Albuminous cells |
| C. | Idioblasts |
| D. | None of the above |
| Answer» C. Idioblasts | |
| 799. |
Which of the following statements are correct regarding "Lactational amenorrhoea"? (i) It means absence of menstruation. (ii) Ovulation does not occur during the lactational period. (iii) Chances of failure of contraception are almost nil upto six months following parturition. (iv) Side effects are almost nil. (v) Contraceptive efficiency reduces after the period of intense lactation. (vi) It is natural method of contraception. (vii) It increases phagocytosis of sperms. |
| A. | (ii), (iii), (iv), (v) and (vi) |
| B. | All except (vii) |
| C. | (ii), (iii), (iv) and (v) |
| D. | All of these |
| Answer» C. (ii), (iii), (iv) and (v) | |
| 800. |
Pure fractions of cellular components can be isolated by [Kerala CET 2005] |
| A. | Chromatography |
| B. | Scanning electron microscopy |
| C. | X-ray diffraction |
| D. | Differential centrifugation |
| E. | Autoradiography |
| Answer» E. Autoradiography | |