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This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
What does operon contain ? |
| A. | Regulator gene + promotor gene |
| B. | Operator gene + structural gene |
| C. | Regulator gene + promotor gene structural gene |
| D. | Regulator gene + promotor gene + operator gene + structural gene |
| Answer» E. | |
| 802. |
The enzyme amino acyl t-RNA-synthetase facilitates. |
| A. | Joining two neighbouring amino acids on ribosomes |
| B. | A doption of amino acids by a t-RNA molecule |
| C. | Insertion of amino acyl t-RNA into the ribosome sites |
| D. | Transfer of amino acyl t-RNA from the ribosomal ‘A’ site to ‘P’ site |
| Answer» C. Insertion of amino acyl t-RNA into the ribosome sites | |
| 803. |
Which of the following enzymes can detect and correct the wrong inserted base during DNA replication ? |
| A. | DNA polymerase - I |
| B. | DNA polymerase - II |
| C. | Primase |
| D. | Ligase |
| Answer» B. DNA polymerase - II | |
| 804. |
HIV decrease... (MP PMT 1997) |
| A. | Helper T-Cell |
| B. | All T-Cells |
| C. | Only B-Cells |
| D. | B-Cell & T-Cell |
| Answer» B. All T-Cells | |
| 805. |
In relation of lac operon in E-coli , Which protein is not regulated by the repressor ? |
| A. | Tryptophan |
| B. | galactosidase |
| C. | Lactose permease |
| D. | Transacetylase |
| Answer» B. galactosidase | |
| 806. |
Response against allergic inflammation, is given by which substance produced by mast cells ? (MP PMT 1997) |
| A. | Histamine |
| B. | Antibody |
| C. | Antigen |
| D. | None |
| Answer» B. Antibody | |
| 807. |
Which of the following amino acid is coded by 3 codons ? |
| A. | serine |
| B. | Proline |
| C. | Tryptophan |
| D. | Isoleucine |
| Answer» E. | |
| 808. |
state the anticodon of initiation codon of protein synthesis |
| A. | UAC |
| B. | UUU |
| C. | CAU |
| D. | AUG |
| Answer» B. UUU | |
| 809. |
Humans have approximately _____ times more genes than E.coli |
| A. | 8 |
| B. | 15 |
| C. | 100 |
| D. | 50 |
| Answer» E. | |
| 810. |
Which is the energy source for the process of elongation ? |
| A. | ATP |
| B. | GTP |
| C. | Creatine-PO4 |
| D. | All the above |
| Answer» C. Creatine-PO4 | |
| 811. |
Select the correct answer / answers from the following |
| A. | 1, 2, 3 and 4, are corrent |
| B. | 1 and 2 are correct, 3 and 4 are false |
| C. | 1 and 3 are correct, 2 and 4 false |
| D. | 1, 2, 3 are correct, 4 is false |
| Answer» D. 1, 2, 3 are correct, 4 is false | |
| 812. |
Carcinoma refer to... (CBSE, PMT 2003) |
| A. | Malignant tumours of the connective tissue |
| B. | Malignant tumours of the skin or mucous membrane |
| C. | Malignant tumours of the colon |
| D. | Begign tumours of the connective tissue |
| Answer» B. Malignant tumours of the skin or mucous membrane | |
| 813. |
By whom inlfuenza occurs ? (BHU 2002) |
| A. | Viru |
| B. | Bacteria |
| C. | Fungi |
| D. | Protista |
| Answer» B. Bacteria | |
| 814. |
What are interferons ? (CBSE 2001) |
| A. | Antiviral Protien |
| B. | Antibacterial Protien |
| C. | Anticancer Protien |
| D. | Conjugated Protien |
| Answer» B. Antibacterial Protien | |
| 815. |
Where memory cells are formed ? (DPMT 2005) |
| A. | Monocyte |
| B. | Eosinophills |
| C. | Neutrophills |
| D. | Lymphocytes |
| Answer» E. | |
| 816. |
Which is most infectious disease ? (CBSE 2001) |
| A. | Hepatitis - B |
| B. | AIDS |
| C. | Cough & Comman Cold |
| D. | Malaria |
| Answer» D. Malaria | |
| 817. |
Antibodies in our body are complex ? (CBSE, PMT 2006) |
| A. | Steroid |
| B. | Prostaglandins |
| C. | Glycoproteins |
| D. | Lipoprotein |
| Answer» D. Lipoprotein | |
| 818. |
What is there as a genetic material in HIV in addition to protein layer ? (CBSE 1998) |
| A. | The chains containing DNA |
| B. | One chains containing DNA |
| C. | Two chains containing RNA |
| D. | One chains containing RNA |
| Answer» E. | |
| 819. |
By what we get passive immunity ? |
| A. | Antibody |
| B. | Antigen |
| C. | Antibiotic |
| D. | Vaccination |
| Answer» B. Antigen | |
| 820. |
The molecule, which stimulates the immune response is... (PMT 1997) |
| A. | Antibody |
| B. | Antigen |
| C. | Mutant |
| D. | Carcinogen |
| Answer» C. Mutant | |
| 821. |
By What antibodies are made ? (CBSE 2003) |
| A. | RBC |
| B. | Thrombocytes |
| C. | Monocytes |
| D. | Lymphocytes |
| Answer» E. | |
| 822. |
From given diagram identify virus then give the name of sugar in structure of nucleic acid ? |
| A. | Ribose |
| B. | Deoxyribose |
| C. | both a & b |
| D. | none of these |
| Answer» B. Deoxyribose | |
| 823. |
Which cancer affects lymph gland and spleen ? (PMT 2004) |
| A. | Carcinoma |
| B. | Surcoma |
| C. | Leukemia |
| D. | Lymphoma |
| Answer» C. Leukemia | |
| 824. |
Which kind of drug are obtained from given plant ? |
| A. | Cannabinoids |
| B. | Charas |
| C. | Ganja |
| D. | All of these |
| Answer» E. | |
| 825. |
Which disease is spread by mosquito but does not occurs by virus ? (CPMT 1998) |
| A. | Meningitie |
| B. | Dengue fever |
| C. | Yellow fever |
| D. | Filarisis |
| Answer» B. Dengue fever | |
| 826. |
AIDS spread by.... (MP PMT 1998) |
| A. | Blood Transfusion |
| B. | Shaking Hands |
| C. | HIV infected blood transfusion |
| D. | All of above |
| Answer» D. All of above | |
| 827. |
Whose number increase during allergy ? (Manipal 1999) |
| A. | Ig A |
| B. | Ig E |
| C. | Ig G |
| D. | Ig M |
| Answer» C. Ig G | |
| 828. |
Who is Responsible for typhoid ? (CBSE 1998) |
| A. | Vibreo Choleri |
| B. | Salmonella |
| C. | Shingella |
| D. | Eschericia Coli |
| Answer» C. Shingella | |
| 829. |
Vaccination protects from disease, Because... (BHU 1999) |
| A. | It helps in digestion |
| B. | It increases the no. of RBCs |
| C. | It produces antibodies |
| D. | It maintains heat system of the body |
| Answer» D. It maintains heat system of the body | |
| 830. |
Which is blood cancer ? (MP PMT 1998) |
| A. | Chloremia |
| B. | Leukemia |
| C. | Uremia |
| D. | Protemia |
| Answer» C. Uremia | |
| 831. |
The growing immunity, after getting the disease free body (PMT 1996) |
| A. | Active acquired immunity |
| B. | Passiue acquired immunity |
| C. | a & b both |
| D. | None |
| Answer» B. Passiue acquired immunity | |
| 832. |
Cancer of Muscle : Sarcoma. Cancer of Skin :_________ |
| A. | Sarcoma |
| B. | Lerkemia |
| C. | Melenoma |
| D. | Glucoma |
| Answer» D. Glucoma | |
| 833. |
Cancer is associated with.... (MP CPMT 1996) |
| A. | Uncontrollable growth of tissue |
| B. | Ageing procers |
| C. | Controlled division of tissue |
| D. | None |
| Answer» B. Ageing procers | |
| 834. |
By which AIDS spread ? |
| A. | Blood Cancer |
| B. | T-Cell leukemia virus of Human |
| C. | Bacterium |
| D. | TMV |
| Answer» C. Bacterium | |
| 835. |
Because of smoking which kind of changes occurs in blood ? |
| A. | Proportion of CO2 decreases & in Hb also CO2 deoreases |
| B. | Propotion of O2 decreases &in Hb propertion of O2 increases |
| C. | Proportion of O2 increases & in Hb proportion of O2 decreses. |
| D. | Proportion of CO2 increases & in Hb proportion of O2 decreses. |
| Answer» E. | |
| 836. |
Where salmonella is associated ? (CBSE 2001) |
| A. | Typhoid |
| B. | Polio |
| C. | TB |
| D. | Tetanus |
| Answer» B. Polio | |
| 837. |
Suddenly any person get rid of Alcohol or drug then which kind of deficincy accurs in that person? |
| A. | Visual Syndrome |
| B. | Drowns syndrome |
| C. | Turner syndnome |
| D. | Cry-du-chat syndrome |
| Answer» E. | |
| 838. |
What is reason for causing AIDS. |
| A. | Cereto immunity |
| B. | Interferon |
| C. | Destroying & Helper Tcells |
| D. | Destroying of killer T cells |
| Answer» D. Destroying of killer T cells | |
| 839. |
From what Neoplastic is generated ? |
| A. | X ray |
| B. | rays |
| C. | U.V rays |
| D. | DNA |
| Answer» E. | |
| 840. |
Cold-Rhino virus AIDS ______ |
| A. | Retroviru |
| B. | Retro bacteria |
| C. | HMV |
| D. | Oncogenic virus |
| Answer» B. Retro bacteria | |
| 841. |
Opium : Morphine - Pain reliever medicineCannabinoid : _________ - _________ |
| A. | Tobacco, Nicotine |
| B. | Cocain, Erthroxylum |
| C. | Marijuana, Produce more quantity of urine |
| D. | Ergot, change mood |
| Answer» D. Ergot, change mood | |
| 842. |
In which disease prepared antibodies are entered ? |
| A. | Chicken pox |
| B. | T.B |
| C. | Cold |
| D. | Rabies |
| Answer» E. | |
| 843. |
From what Lysergic acid is formed ? |
| A. | Ergot fungi |
| B. | Cannabinoids plants |
| C. | Heroine |
| D. | THC |
| Answer» B. Cannabinoids plants | |
| 844. |
Match the column-I, column-II & column-II. |
| A. | P-(iv)-(III), Q-(ii)-(II), R-(iii)-(IV), S-(i)-(I) |
| B. | P-(iii)-(II), Q-(ii)-(I), R-(iv)-(III), S-(i)-(IV) |
| C. | P-(ii)-(I), Q-(iii)-(III), R-(i)-(IV), S-(iv)-(II) |
| D. | P-(i)-(IV), Q-(iv)-(III), R-(iii)-(II), S-(ii)-(I) |
| Answer» B. P-(iii)-(II), Q-(ii)-(I), R-(iv)-(III), S-(i)-(IV) | |
| 845. |
Genetic material of virus in macrophege is regenerated in DNA by which enyme ? |
| A. | Transcriptase |
| B. | Reverse Transcriptasce |
| C. | RNA polymerase |
| D. | DNA polymeane |
| Answer» C. RNA polymerase | |
| 846. |
W.B test : AIDS - Immuno deficiency syndrome WIDAL test : ________ , ________ |
| A. | Typhoid, increase in size of spleen & liver |
| B. | Typhoid, pain in stomach |
| C. | Typhoid, Burning in felt in intestine |
| D. | All of the given |
| Answer» E. | |
| 847. |
Which one is right sequence for lifecycle of Anopheles mosquito ? |
| A. | Oocyst ookinesesporozoitesgamatooyte |
| B. | Ookineteoocystgamatocytesporozoites |
| C. | Gamatoeyteoocystsporozoitesookinete |
| D. | Gamatocyteookineteoocystsporozoites |
| Answer» E. | |
| 848. |
Which plant is responsible for doing hallucination ? |
| A. | Atropa Baladona |
| B. | Datura |
| C. | Erythroxylum coca |
| D. | All of the given |
| Answer» E. | |
| 849. |
Contegious disease- Typhoid.Non contogious diseace _______ |
| A. | AID |
| B. | Hepatitis |
| C. | Malaria |
| D. | Cancer |
| Answer» E. | |
| 850. |
Tears in eye : Physiological Barrier Skin : __________ |
| A. | Physical Barrieer |
| B. | Physiological Barrier |
| C. | Cellular Barrier |
| D. | Cytokine Barrier |
| Answer» B. Physiological Barrier | |