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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.
| 701. |
In a grafted plant, stock has 48 chromosomes while scion has 24 chromosomes. The chromosome number for root cells and eggs are: |
| A. | 48 and 24 |
| B. | 24 and 24 |
| C. | 24 and 12 |
| D. | 48 and 12 |
| Answer» E. | |
| 702. |
Chlorenchyma cells are chlorophyll containing |
| A. | Sclerenchyma cells |
| B. | Epidermis |
| C. | Parenchyma |
| D. | Phloem |
| Answer» D. Phloem | |
| 703. |
Adaptation to low temperature and freezing in animals occurs due to the production of- |
| A. | Antifreeze proteins |
| B. | Chaperonins |
| C. | Proline |
| D. | Analine |
| Answer» B. Chaperonins | |
| 704. |
When cocci are present in the bunch, they are called |
| A. | Diplococci |
| B. | Streptococci |
| C. | Staphylococci |
| D. | Streptobacilli |
| Answer» D. Streptobacilli | |
| 705. |
Serum is [Orissa JEE 2004] |
| A. | Blood without fibrinogen |
| B. | Lymph without corpuscles |
| C. | Blood without corpuscles and fibrinogen |
| D. | Lymph |
| Answer» D. Lymph | |
| 706. |
Vitamins synthesized by intestinal bacteria and absorbed in significant quantities include: |
| A. | folicacid |
| B. | riboflavin |
| C. | thiamine |
| D. | vitamin \[{{B}_{12}}\] |
| Answer» B. riboflavin | |
| 707. |
Electron microscope is made up of [MP PMT 2004] |
| A. | Objective and ocular lenses |
| B. | Polarizer and analyzer filters |
| C. | Electromagnetic lenses |
| D. | Fluorochromes |
| Answer» D. Fluorochromes | |
| 708. |
Active division takes place in the cells of [MP PMT 1998] |
| A. | Xylem |
| B. | Phloem |
| C. | Cambium |
| D. | Sclerenchyma |
| Answer» D. Sclerenchyma | |
| 709. |
Which one of the following is the most suitable medium for culture of Drosophilam elanogaster? |
| A. | Agaragar |
| B. | Ripe banana |
| C. | Cow dung |
| D. | Moist bread |
| Answer» C. Cow dung | |
| 710. |
Read the assertion and reason carefully: Assertion : Idioblasts are derived from parenchyma. Reason : Secretory cells are modified parenchyma. |
| 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 | |
| 711. |
Assertion : In gymnosperms, plants show well-developed vessels and fibres. Reason : Companion cells are absent in gymnosperm. |
| 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. | |
| 712. |
Emergency contraceptives are effective if used Within: |
| A. | 72 hours of coitus |
| B. | 72 hours of ovulation |
| C. | 72 hours of menstruation |
| D. | 72 hours of implantation |
| Answer» B. 72 hours of ovulation | |
| 713. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Death is an essential and inescapable biological phenomenon. Reason : Death maintains ecological homeostasis and justifies the need of reproduction. |
| 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 | |
| 714. |
Sometimes when a virus attacks a bacterium, neither the virus multiplies nor the bacterium dies. This phenomenon is called as [MP PMT 1998] |
| A. | Adsorption |
| B. | Assimilation |
| C. | Lysogeny |
| D. | Viral stability |
| Answer» D. Viral stability | |
| 715. |
During non-cyclic photophosphorylation, in which of the following, \[4{{e}^{-}}\] produced through photolysis will enter? |
| A. | PQ |
| B. | PS-I |
| C. | PS-II |
| D. | PC |
| Answer» E. | |
| 716. |
Non-endospermic seeds are found in: |
| A. | Castor |
| B. | Rice |
| C. | Wheat |
| D. | Bean |
| Answer» E. | |
| 717. |
A cap like region of slowly dividing or inactive cells in the middle of highly meristematic cells (between meristem and root cap) is [AMU 1992] |
| A. | Somatic zone |
| B. | Vegetative zone |
| C. | Quiescent centre |
| D. | Corpus centre |
| Answer» D. Corpus centre | |
| 718. |
Winch of the following shows the correct example of taxonomic category - Genus? |
| A. | Potato, tomato and brinjal belong to Solanum. |
| B. | Monkey, gorilla and gibbon are placed in Mammalia. |
| C. | Solanum, Petunia, and Datura are placed in Solanacea. |
| D. | Mangifera indica, Solanum tuberosum, and Panthera leo. |
| Answer» B. Monkey, gorilla and gibbon are placed in Mammalia. | |
| 719. |
The linkage map of X-chromosome of fruit fly has 66 units, with yellow body gene (y) at one end and bobbed hair [b] gene at the other end. The recombination frequency between these two genes (y and b) should be: |
| A. | 100% |
| B. | 0.66 |
| C. | >50% |
| D. | \[\le 50%\] |
| Answer» C. >50% | |
| 720. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Tobacco belongs to solanaceae. Reason : Tobacco was called as Pipe of Piece. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» C. If assertion is true but reason is false. | |
| 721. |
What point can be cited for 10% sodium chloride solution and 10% sugar solution present? |
| A. | Both have equal OP |
| B. | The concentration of sodium chloride solution will be less than concentration of sugar solution. |
| C. | The OP of sugar solution will be higher than OP of sodium chloride solution. |
| D. | DPD of sodium chloride solution will be higher than DPD of sugar solution. |
| Answer» E. | |
| 722. |
In Luffa the tendrils are modified |
| A. | Extra-axillary branches |
| B. | Stipules |
| C. | Axillary branches |
| D. | Petioles |
| Answer» B. Stipules | |
| 723. |
Histogen theory is more applicable for [CPMT 1999] |
| A. | Root apex |
| B. | Shoot apex |
| C. | Meristematic tissue |
| D. | None of these |
| Answer» B. Shoot apex | |
| 724. |
Birth control pills check ovulation in female by inhibiting the secretion of: |
| A. | Follicle stimulating hormone (FSH) |
| B. | Luteinising hormone (LH) |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» D. None of the above | |
| 725. |
A sex linked recessive gene C produces red green colour blindness in humans. A normal woman whose father was colourblind marries a colourblind man. Of all the girls born to these parents what percentage is expected to be colourblind [JIPMER 2002] |
| A. | 25 percent |
| B. | 50 percent |
| C. | 75 percent |
| D. | 100 percent |
| Answer» C. 75 percent | |
| 726. |
Pineapple can be made to flower in off season by: |
| A. | Ethylene |
| B. | Zeatin |
| C. | Naphthalene Acetic Acid (NAA) |
| D. | Temperature |
| Answer» D. Temperature | |
| 727. |
Christmas disease is another name of: |
| A. | Sleeping sickness |
| B. | Haemophilia |
| C. | Hepatitis B |
| D. | Down's syndrome |
| Answer» C. Hepatitis B | |
| 728. |
Number of oxygen atoms required for aerobic oxidation of pyruvate: |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 12 |
| Answer» D. 12 | |
| 729. |
The androecium of Malvaceae is [AFMC 1983, 94; BHU 1992; RPMT 1992, 96; AMU 1997] |
| A. | Didynamous |
| B. | Tetradynamous |
| C. | Diadelphous |
| D. | Monadelphous |
| Answer» E. | |
| 730. |
In Ulothrix, the cell contains [AFMC 1994] |
| A. | A chloroplast with many pyrenoids |
| B. | A chloroplast with a few pyrenoids |
| C. | A few chloroplasts with a few pyrenoids |
| D. | Many chloroplasts with a few pyrenoids |
| Answer» C. A few chloroplasts with a few pyrenoids | |
| 731. |
No image formation occurs on blind-spot of retina because: |
| A. | It is not present on the optical axis of the eye. |
| B. | Here cones and rods are absent. |
| C. | On this part only cones are present. |
| D. | The nerve fibres of this region do not contribute in the formation of optic chiasma. |
| Answer» C. On this part only cones are present. | |
| 732. |
Goats feed on |
| A. | Low herbs |
| B. | Grass |
| C. | Low shrubs |
| D. | Shrubs and low trees |
| Answer» E. | |
| 733. |
Grafting is a method to transmit |
| A. | Viral disease |
| B. | Mycoplasmal disease |
| C. | Viroid disease |
| D. | All the above |
| Answer» E. | |
| 734. |
Substrate for photorespiration is: |
| A. | Serine |
| B. | Glycolate |
| C. | Indole acetic acid |
| D. | Malic acid |
| Answer» C. Indole acetic acid | |
| 735. |
Read the assertion and reason carefully: Assertion : Bats are attracted by the odour of fruits. Reason : They disperse soft and sweet 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 | |
| 736. |
Ora serrata is: |
| A. | Oral cavity of protochordates. |
| B. | Anterior edge of sensory portion of the retina. |
| C. | Taste receptor. |
| D. | A part of utriculus of ear. |
| Answer» C. Taste receptor. | |
| 737. |
Adam's apple represents: |
| A. | Cartilage of larynx |
| B. | Thyroid cartilage of trachea |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» B. Thyroid cartilage of trachea | |
| 738. |
The smallest unit of classification is: |
| A. | Family |
| B. | Order |
| C. | Genus |
| D. | Species |
| Answer» E. | |
| 739. |
Match the terms given in column-I with their feature given in column-II and choose the correct option. Column-I (Terms) Column-II (Features) A. Exocrine gland I. They help to stop substances from leaking across a tissue B. Endocrine gland II. Hormones are secreted directly into the fluid bathing the gland C. Tight junctions III. They perform cementing to keep neighbouring cells together. D. Adhering IV. Secretes mucus, saliva, junction?s earwax, oil, milk, digestive enzymes and other cell products. |
| A. | A-IV; B-II; C-I; D-III |
| B. | A-II; B-IV; C-I; D-III |
| C. | A-IV; B-II; C-III; D-I |
| D. | A-IV; B-I; C-II; D-III |
| Answer» B. A-II; B-IV; C-I; D-III | |
| 740. |
Hyaline cartilage forms |
| A. | Tracheal rings |
| B. | Pubic symphysis |
| C. | Epiglottis |
| D. | External ear |
| Answer» B. Pubic symphysis | |
| 741. |
Ability to reproduce declines due to deficiency of vitamin: |
| A. | B |
| B. | C |
| C. | D |
| D. | E |
| Answer» E. | |
| 742. |
Which one is ineffective against antibiotics [NCERT 1976] |
| A. | Bacterial infected wound |
| B. | Bacterial infected throat |
| C. | Haemophilia |
| D. | Bacterial infected gonorrhoea |
| Answer» C. Haemophilia | |
| 743. |
The beri-beri is a paralytic disease caused by the deficiency of Vitamin \[{{B}_{1}}\] (thiamine). It was discovered by: (Pb.PMT2007) |
| A. | Funk |
| B. | Stanley |
| C. | Eizkman |
| D. | G.E. Foxon |
| Answer» D. G.E. Foxon | |
| 744. |
Examples of bulk flow by a positive hydrostatic pressure gradient and a negative hydrostatic pressure gradient are: |
| A. | Suction through straw and swelling of wood, respectively. |
| B. | Imbibition and a garden hose. |
| C. | Garden hose and suction through a straw, respectively. |
| D. | Swelling of wood and imbibition, respectively. |
| Answer» D. Swelling of wood and imbibition, respectively. | |
| 745. |
Read the assertion and reason carefully: Assertion : Compound umbel is branched. Reason : In compound umbel, both involucre and involucels are present. |
| 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 | |
| 746. |
Competitive exclusion principle was put forward by G.F. Gause on the basis of experimental observation on: |
| A. | Chlorella |
| B. | Paramoecium |
| C. | Microcystis |
| D. | Cuckoo bird |
| Answer» C. Microcystis | |
| 747. |
Vitamins are: |
| A. | organic substances which can mostly be synthesized by animals |
| B. | inorganic substances and cannot be synthesized by animals |
| C. | organic substances which cannot mostly be synthesized by animals |
| D. | inorganic substances and can be synthesized by animals |
| Answer» D. inorganic substances and can be synthesized by animals | |
| 748. |
The feet with two toes forming cloven hoof is seen in [Kerala PMT 2004] |
| A. | Horse |
| B. | Elephant |
| C. | Sheep |
| D. | Zebra |
| Answer» D. Zebra | |
| 749. |
Heterotropic nutrition is found in [CPMT 1985] |
| A. | Opuntia |
| B. | Drosera |
| C. | Vallisnaria |
| D. | Pistia |
| Answer» C. Vallisnaria | |
| 750. |
Chloroplasts of Spirogyra have [BVP 2003] |
| A. | Smooth margin |
| B. | Wavy margin |
| C. | Smooth or wavy margin |
| D. | None of the above |
| Answer» C. Smooth or wavy margin | |