MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Stomata open at night in |
| A. | CAM plants |
| B. | C3 plants |
| C. | C4 plants |
| D. | succulent plants |
| Answer» B. C3 plants | |
| 2. |
The most abundant element present in plant is |
| A. | nitrogen |
| B. | manganese |
| C. | carbon |
| D. | iron |
| Answer» D. iron | |
| 3. |
In N2- fixation process, nitrite is converted to nitrate by |
| A. | Nitrobacter |
| B. | Azotobacter |
| C. | Nitosomonas |
| D. | Azospirillum |
| Answer» B. Azotobacter | |
| 4. |
Release of water from plants as water droplet is known as |
| A. | root pressure |
| B. | transpiration |
| C. | osmotic pressure |
| D. | guttation |
| Answer» E. | |
| 5. |
The genotype of a plant showing a dominant phenotype can be determined by |
| A. | backcross |
| B. | dihybrid cross |
| C. | testcross |
| D. | pedigree analysis |
| Answer» D. pedigree analysis | |
| 6. |
Mendel's second law is the law of |
| A. | segregation |
| B. | independent assortment |
| C. | dominance |
| D. | polygenic inheritance |
| Answer» C. dominance | |
| 7. |
The wings of bat and bird are |
| A. | homologous but not analogous |
| B. | neither homologous nor analogous |
| C. | analogous but not homologous |
| D. | vestigial |
| Answer» B. neither homologous nor analogous | |
| 8. |
Down's syndrome is due to |
| A. | linkage |
| B. | inheritance |
| C. | crossing-over |
| D. | non-disjunction of chromosome |
| Answer» E. | |
| 9. |
Which one is linked to evolution |
| A. | Extinction |
| B. | Competition |
| C. | Reproduction |
| D. | Variation |
| Answer» E. | |
| 10. |
Which part of Rauwolfia plant is used to obtain the alkaloid reserpine |
| A. | Leaf |
| B. | Bark |
| C. | Root |
| D. | Stem |
| Answer» D. Stem | |
| 11. |
Chromosomes are best seen in |
| A. | interphase |
| B. | prophase |
| C. | metaphase |
| D. | telophase |
| Answer» D. telophase | |
| 12. |
Which of the following is structural subunit of DNA |
| A. | Protein |
| B. | Carbohydrate |
| C. | RNA |
| D. | Nucleotide |
| Answer» E. | |
| 13. |
In which cell organelle, is the double membrane absent |
| A. | Nucleus |
| B. | Mitochondria |
| C. | Lysosome |
| D. | Chloroplast |
| Answer» D. Chloroplast | |
| 14. |
Which one is the basic unit of classification |
| A. | Division |
| B. | Family |
| C. | Class |
| D. | Species |
| Answer» E. | |
| 15. |
Which one of the following is a non-steroidal hormone |
| A. | Estradiol |
| B. | Prostaglandin |
| C. | Progesterone |
| D. | Estrone |
| Answer» C. Progesterone | |
| 16. |
Oxygenated blood is carried from the lungs to the __ by the pulmonary veins |
| A. | Right ventricle |
| B. | Left ventricle |
| C. | Right auricle |
| D. | Left auricle |
| Answer» E. | |
| 17. |
Who is known as the father of Botany |
| A. | Carolus Linnaeus |
| B. | Theophrastus |
| C. | Hutchinson |
| D. | Bentham |
| Answer» C. Hutchinson | |
| 18. |
Prothrombin is synthesized in |
| A. | Liver |
| B. | Spleen |
| C. | Pancreas |
| D. | Kidney |
| Answer» B. Spleen | |
| 19. |
Numerical changes in chromosomes are known as |
| A. | Euploidy |
| B. | Aneuploidy |
| C. | Polyploidy |
| D. | Allopolyploidy |
| Answer» D. Allopolyploidy | |
| 20. |
The function of cytokinin is increases |
| A. | Cell elongation |
| B. | Fruit initiation |
| C. | Cell division |
| D. | Differentiation |
| Answer» D. Differentiation | |
| 21. |
Clover leaf model of RNA is called |
| A. | tRNA |
| B. | sRNA |
| C. | mRNA |
| D. | rRNA |
| Answer» B. sRNA | |
| 22. |
The hormone renin is produced by the |
| A. | Pancreas |
| B. | Gall Bladder |
| C. | Liver |
| D. | Kidneys |
| Answer» E. | |
| 23. |
Exhibition of superiority by a hybrid over both of its parents is called |
| A. | Heterosis |
| B. | Hybridization |
| C. | Hypostatis |
| D. | Recessive |
| Answer» B. Hybridization | |
| 24. |
Haemoglobin, haemocyanin, serum, albumin are __ type of proteins |
| A. | regulatory |
| B. | transport |
| C. | storage |
| D. | protective |
| Answer» C. storage | |
| 25. |
Which of the following is male accessory reproductive glands in mammals |
| A. | Gastric gland |
| B. | Mushroom shaped gland |
| C. | Prostate gland |
| D. | Inguinal gland |
| Answer» D. Inguinal gland | |
| 26. |
Ants communicate through |
| A. | Pheromones |
| B. | Hormones |
| C. | Allomones |
| D. | Kairomones |
| Answer» B. Hormones | |
| 27. |
Stomata helps in |
| A. | exchange of gases |
| B. | exchange of lipids |
| C. | exchange of water |
| D. | exchange of proteins |
| Answer» B. exchange of lipids | |
| 28. |
Which of the following plants do not have Chlorophyll |
| A. | Cactus |
| B. | Orchid |
| C. | Cuscuta |
| D. | Touch me not |
| Answer» D. Touch me not | |
| 29. |
Which one is the longest part of the alimentary canal |
| A. | Oseophagus |
| B. | Large Intestine |
| C. | Small Intestine |
| D. | Stomach |
| Answer» D. Stomach | |
| 30. |
Alimentary canal runs from mouth to |
| A. | Stomach |
| B. | Small Intestine |
| C. | Large Intestine |
| D. | Anus |
| Answer» E. | |
| 31. |
The "Lock and key" theory of enzyme action was proposed by |
| A. | Bernard |
| B. | Michaelis |
| C. | Von Helmont |
| D. | Emil Fischer |
| Answer» E. | |
| 32. |
Who is known as the Father of Ichthyology |
| A. | Aristotle |
| B. | Gunther |
| C. | Smith |
| D. | Peter Artedi |
| Answer» E. | |
| 33. |
HIV infection causes |
| A. | Inactivation of T cells |
| B. | Killing of T cells |
| C. | Activate T cells |
| D. | Hyperactivation of T cells |
| Answer» B. Killing of T cells | |
| 34. |
Total number of air sacs in birds are |
| A. | 3 |
| B. | 5 |
| C. | 9 |
| D. | 10 |
| Answer» D. 10 | |
| 35. |
Urinary bladder is absent in |
| A. | Shark |
| B. | Teleost fish |
| C. | Lung fish |
| D. | Coelacanth |
| Answer» B. Teleost fish | |
| 36. |
Human Insulin consists of __ amino residues |
| A. | 42 |
| B. | 45 |
| C. | 48 |
| D. | 51 |
| Answer» E. | |
| 37. |
Total number of chromosomes found in the people suffering from Klinefelter's syndrome are |
| A. | 44 |
| B. | 46 |
| C. | 47 |
| D. | 48 |
| Answer» D. 48 | |
| 38. |
The skeleton secreting cells in poriferans are known as |
| A. | Scleroblasts |
| B. | Collenocytes |
| C. | Archaeocytes |
| D. | Pinacocytes |
| Answer» B. Collenocytes | |
| 39. |
Structure of DNA was discovered by |
| A. | James Watson and Francis Crick |
| B. | Thomas Watson and James Crick |
| C. | Emma Watson and Robert Crick |
| D. | Francis Watson and James Crick |
| Answer» B. Thomas Watson and James Crick | |
| 40. |
The inactive form of an enzyme is |
| A. | Enterokinase |
| B. | Isozyme |
| C. | Zymogens |
| D. | Epimerase |
| Answer» D. Epimerase | |
| 41. |
Cytokines are produced by |
| A. | Mast cells |
| B. | Phagocytes |
| C. | Basophils |
| D. | T-cells |
| Answer» E. | |
| 42. |
The type of placenta in ruminants is |
| A. | Haemochorial |
| B. | Epitheliochorial |
| C. | Endotheliochorial |
| D. | Haemoendotheliochorial |
| Answer» D. Haemoendotheliochorial | |
| 43. |
Golgi complex is absent in |
| A. | Thyroid cells |
| B. | Mucous cells |
| C. | Hepatic cells |
| D. | Blue green algae |
| Answer» E. | |
| 44. |
The teeth of shark is a modified __ scale |
| A. | Ctenoid |
| B. | Cycloid |
| C. | Ganoid |
| D. | Placoid |
| Answer» E. | |
| 45. |
Prokaryotic cell differs from eukaryotic cell in lacking |
| A. | DNA |
| B. | Nuclear membrane |
| C. | Cell organelles |
| D. | RNA |
| Answer» C. Cell organelles | |
| 46. |
Cold blooded animals are known as |
| A. | Homiotherms |
| B. | Eurytherms |
| C. | Endotherms |
| D. | Poikilotherms |
| Answer» E. | |
| 47. |
Modern hypothesis of "Origin of Life" was proposed by |
| A. | Pasteur |
| B. | Oparin and Haldane |
| C. | Spellanzeni |
| D. | Haeckel |
| Answer» C. Spellanzeni | |
| 48. |
Which of the following is found in plant cells but not in animal cells |
| A. | Cell Wall |
| B. | Vacuoles |
| C. | Plasma layer |
| D. | Golgi complex |
| Answer» B. Vacuoles | |
| 49. |
Which of the following activity is known as Bioluminescence in living organism |
| A. | change of skin color |
| B. | emiting light from body |
| C. | emiting poisonous gas |
| D. | None of the above |
| Answer» C. emiting poisonous gas | |
| 50. |
Bones are pneumatic in |
| A. | Fishes |
| B. | Amphibians |
| C. | Reptiles |
| D. | Birds |
| Answer» E. | |