MCQOPTIONS
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MCQOPTIONS
This section includes 83 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Experimental evidence to show that the genetic code is a triplet code was provided by |
| A. | George Gamow |
| B. | Watson & Crick |
| C. | Nirenberg and Mathaei |
| D. | None of these |
| Answer» D. None of these | |
| 2. |
Assertion (A) : |
| A. | Both A and R are true and R is correct explanation of A. |
| B. | Both A and R are true but R is not the correct explanation of A. |
| C. | A is true but R is false. |
| D. | A is false but R is true. |
| Answer» E. | |
| 3. |
Which type of DNA is found in bacteria ? |
| A. | Straight DNA |
| B. | Helical DNA |
| C. | Circular DNA |
| D. | Membrane - bound DNA |
| Answer» D. Membrane - bound DNA | |
| 4. |
Three law of heredity given by Mendal relate |
| A. | Gene linkage, Segregation and Independent assortments |
| B. | Gene linkage, Dominance and segregation |
| C. | Segregation, Independent assortments and dominance |
| D. | Segregation, Independent assortments and gene linkage |
| Answer» D. Segregation, Independent assortments and gene linkage | |
| 5. |
Which of the following professional are more likely to run the risk of a permanent change in their cell's DNA ? |
| A. | 2 alone |
| B. | 1, 2 and 3 |
| C. | 1, 2 and 4 |
| D. | 1, 3 and 4 |
| Answer» D. 1, 3 and 4 | |
| 6. |
DNA molecule has small units called |
| A. | Purines |
| B. | Adenine and thymine |
| C. | Cistron, muton and recone |
| D. | Adenine |
| Answer» D. Adenine | |
| 7. |
Genes located on mitochondrial DNA |
| A. | Generally show maternal inheritance |
| B. | Are always inherited from male parent |
| C. | Show hipa rental inheritance |
| D. | Are not inherited like the nuclear gene. |
| Answer» B. Are always inherited from male parent | |
| 8. |
Nucleic acids are made of |
| A. | Nucleotides |
| B. | Nucleosides |
| C. | Amino acids |
| D. | Protein |
| Answer» B. Nucleosides | |
| 9. |
Heredity characters of parent is transfered to their offspring by |
| A. | Blood |
| B. | Harmone |
| C. | Chromosomes |
| D. | None of these |
| Answer» D. None of these | |
| 10. |
Gene located at the same locus but having different expression are |
| A. | Multiple alleles |
| B. | Oncogenes |
| C. | Polygenes |
| D. | Codominants |
| Answer» B. Oncogenes | |
| 11. |
When one gene controls two or more different characters simultaneously, the phenomena is called |
| A. | Apomixis |
| B. | Pleiotropy |
| C. | Playploidy |
| D. | Palyteny |
| Answer» C. Playploidy | |
| 12. |
One gene one enzyme theory is given by |
| A. | Watson and Crick |
| B. | Har Govind Khurana |
| C. | Beadle and Tatum |
| D. | Morgan |
| Answer» D. Morgan | |
| 13. |
RNA Contains |
| A. | Hexose |
| B. | Ribose |
| C. | Fructose |
| D. | Glucose |
| Answer» C. Fructose | |
| 14. |
Artificial gene synthesis was first done in laboratory by |
| A. | Millar |
| B. | Khurana |
| C. | D. Veries |
| D. | Kelvin |
| Answer» C. D. Veries | |
| 15. |
Insect resistant cotton plant have been genetically engineered by inserting a gene from a |
| A. | Virus |
| B. | Bacterium |
| C. | Insect |
| D. | Plant |
| Answer» C. Insect | |
| 16. |
For a colour blind person red colour appear as |
| A. | Yellow |
| B. | Blue |
| C. | Green |
| D. | Violet |
| Answer» D. Violet | |
| 17. |
Nucleotide base present in DNA and not RNA is |
| A. | Cytosin |
| B. | Uracil |
| C. | Thymine |
| D. | Guanine |
| Answer» D. Guanine | |
| 18. |
In genetic dictionary there are 64 codons as |
| A. | 64 amino acids are the be coded |
| B. | 64 types of t-RNA are present |
| C. | There are 44 nonsense codons and 29 sense codons |
| D. | Genetic code is triplet |
| Answer» E. | |
| 19. |
DNA strand have |
| A. | Quaternary structure |
| B. | Same polarity |
| C. | Antiparallel polarity |
| D. | Disulphide bond |
| Answer» D. Disulphide bond | |
| 20. |
Which date is known as diabetes day ? |
| A. | 14th February |
| B. | 14th May |
| C. | 14th September |
| D. | 14th November |
| Answer» E. | |
| 21. |
Mendel's principles of inheritance are based on |
| A. | Vegetative reproduction |
| B. | Asexual reproduction |
| C. | Sexual reproduction |
| D. | All of these |
| Answer» D. All of these | |
| 22. |
A colour blind person marry with a normal women, blindness is produced in their |
| A. | Son |
| B. | Daughter |
| C. | Son of their son |
| D. | Daughter of their daughter |
| Answer» E. | |
| 23. |
Number of chromosome in a normal human body cell is |
| A. | 43 |
| B. | 44 |
| C. | 45 |
| D. | 46 |
| Answer» E. | |
| 24. |
Smallest part of DNA that undergoes recombination is |
| A. | Muton |
| B. | Cistron |
| C. | Replicon |
| D. | Recon |
| Answer» E. | |
| 25. |
Find out the mismatched |
| A. | Klinefelter's syndrome - XO |
| B. | Haemophilia - Sex linked |
| C. | Down's syndrome - Autosomal aneuploidy |
| D. | Turner's syndrome - female with retarted sexual development. |
| Answer» B. Haemophilia - Sex linked | |
| 26. |
A person with blood group A possesses |
| A. | Antigen A and antibody B |
| B. | Antigen B and antibody a |
| C. | Antigen A and antibody b |
| D. | No antigen and no antibody |
| Answer» D. No antigen and no antibody | |
| 27. |
The process of transfer of genetic information from DNA to RNA of formation of RNA from DNA is |
| A. | Transversion |
| B. | Transcription |
| C. | Translatoin |
| D. | Translocation |
| Answer» C. Translatoin | |
| 28. |
Gene are made up of |
| A. | DNA |
| B. | RNA |
| C. | DNA & RNA |
| D. | Protein |
| Answer» B. RNA | |
| 29. |
Gregor Johann Mendel is famous for |
| A. | Cell theory |
| B. | Mutation principle |
| C. | Law of heredity |
| D. | Heredity of acquired characters |
| Answer» D. Heredity of acquired characters | |
| 30. |
Which one is correctly matched |
| A. | Down syndrome - 44 autosome + XO |
| B. | Klinfelter's syndrome - 44 autosomes + XXY |
| C. | Erythroblastosis foetalis - X linked |
| D. | Colour blindness - Y linked |
| Answer» C. Erythroblastosis foetalis - X linked | |
| 31. |
Circular DNA is present in |
| A. | E.R. and Ribosomes |
| B. | Ribosomes and chloroplasts |
| C. | Ribosomes and mitochondria |
| D. | Mitochondira and chloroplasts |
| Answer» E. | |
| 32. |
Mendal worked on |
| A. | Edible pea |
| B. | Wild pea |
| C. | Garden pea |
| D. | Pegion Pea |
| Answer» D. Pegion Pea | |
| 33. |
Which of the following is excellent resource of protein for human body ? |
| A. | Cashew |
| B. | Almond |
| C. | (a) & (b) both |
| D. | None of these |
| Answer» D. None of these | |
| 34. |
Which one of following a sex linked disease ? |
| A. | Leprosy |
| B. | Tuberculosis |
| C. | Colour lindness |
| D. | Leukamea |
| Answer» D. Leukamea | |
| 35. |
Unit of heredity is |
| A. | Gene |
| B. | Chromosomes |
| C. | Chromatin |
| D. | None of these |
| Answer» B. Chromosomes | |
| 36. |
Coded information in nucleic acid depend upon |
| A. | Arrangement of nucleotides |
| B. | Position of nucleotides |
| C. | Number of nucleotides |
| D. | All of the above |
| Answer» B. Position of nucleotides | |
| 37. |
Differentiation of organs and tissues in a developing organism is associated with |
| A. | Differential expression of genes |
| B. | Development mutations |
| C. | Delation of genes |
| D. | Lethal mutation |
| Answer» B. Development mutations | |
| 38. |
Most likely reason for development of resistance in against pesticides is |
| A. | Genetic recombination |
| B. | Acquired heritable change |
| C. | Random mutation |
| D. | Directed mutation |
| Answer» D. Directed mutation | |
| 39. |
Mendel's second law is law of |
| A. | Independent assortment |
| B. | Segregation |
| C. | Dominance |
| D. | Polygenic inheritance |
| Answer» C. Dominance | |
| 40. |
Queen Victoria of England was |
| A. | AIDS patient |
| B. | Deaf |
| C. | Haemophiliac |
| D. | Colour blind |
| Answer» D. Colour blind | |
| 41. |
Who is the father of Genetics ? |
| A. | Drawin |
| B. | Mendel |
| C. | Bridge |
| D. | Wiseman |
| Answer» C. Bridge | |
| 42. |
Daughter born to haemophiliac father and normal mother could be |
| A. | Normal |
| B. | Carrier |
| C. | Haemophiliac |
| D. | All of these |
| Answer» C. Haemophiliac | |
| 43. |
Process in which part of a DNA bacterial cell is transferred to another through virus is |
| A. | Reproduction |
| B. | Conjugation |
| C. | Transduction |
| D. | Transformation |
| Answer» D. Transformation | |
| 44. |
The transmission of characters from one generation to next is called |
| A. | Evolution |
| B. | Heredity |
| C. | Genetics |
| D. | Mutation |
| Answer» C. Genetics | |
| 45. |
Who got noble prize for artificial synthesis of DNA ? |
| A. | M. Calvin |
| B. | Khorana |
| C. | Tatum |
| D. | Kornberg |
| Answer» E. | |
| 46. |
Genes are situated on |
| A. | Chromosome |
| B. | Mitochondira |
| C. | Plastids |
| D. | Ribosomes |
| Answer» B. Mitochondira | |
| 47. |
Monohybrid ratio of Mendal's cross is |
| A. | 9 : 3 : 3 : 1 |
| B. | 3 : 1 |
| C. | 1: 1 |
| D. | 2 : 1 |
| Answer» C. 1: 1 | |
| 48. |
Double helix model of DNA is given by |
| A. | Leween hook |
| B. | Salach |
| C. | Watson and Crick |
| D. | Dalton |
| Answer» D. Dalton | |
| 49. |
Which one among the following is not correct about Down's Syndrome ? |
| A. | It is a genetic disorder |
| B. | Effected individual has early ageing |
| C. | Effected person has mental retardation |
| D. | Effected person has furrowed tongue |
| Answer» C. Effected person has mental retardation | |
| 50. |
Which one of the following genetic disease is sex-linked ? |
| A. | Royal haemophilia |
| B. | Tay-saches disease |
| C. | Cystic fibrosis |
| D. | Hypertension |
| Answer» B. Tay-saches disease | |