MCQOPTIONS
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MCQOPTIONS
This section includes 51 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The mechanism of stomatal movement is related to the branch of Biology called |
| A. | Taxonomy |
| B. | Physiology |
| C. | Morphology |
| D. | Anatomy |
| Answer» C. Morphology | |
| 2. |
Sebum produced from sebaceous glands in a mammal helps in |
| A. | Protection against micro organisms |
| B. | Temperature regulation |
| C. | Excretion |
| D. | All of these |
| Answer» B. Temperature regulation | |
| 3. |
Maximum number of species of living things on earth are |
| A. | Algae |
| B. | Fungi |
| C. | Insects |
| D. | Protozoa |
| Answer» D. Protozoa | |
| 4. |
Variety among amino acids is produced due to |
| A. | NH2 group |
| B. | COOH group |
| C. | R group |
| D. | All of these |
| Answer» D. All of these | |
| 5. |
Primary structure of proteins determines |
| A. | Number of polypeptide chains involved |
| B. | Bending of polypeptide chains |
| C. | Amino acid sequence |
| D. | Coiling of polypeptide chains |
| Answer» D. Coiling of polypeptide chains | |
| 6. |
The one which is not a globular protein |
| A. | Anti Rh-antibody |
| B. | Enzyme |
| C. | Myosin |
| D. | Haemoglobin |
| Answer» D. Haemoglobin | |
| 7. |
An enzyme which converts a dipeptide into separate amino acids is an example of |
| A. | Decarboxylase |
| B. | Hydrolase |
| C. | Oxidoreductase |
| D. | Transferase |
| Answer» C. Oxidoreductase | |
| 8. |
Cellular digestion is associated with which organelle |
| A. | Mitochondria |
| B. | Golgi bodies |
| C. | Plastids |
| D. | Lysosomes |
| Answer» E. | |
| 9. |
The first stage of development in which a cavity appears is the |
| A. | Neurula |
| B. | Morula |
| C. | Gastrula |
| D. | Balastula |
| Answer» E. | |
| 10. |
The structure which has been formed or modified from gill pouches in humans is |
| A. | Gills |
| B. | Eustachian tube |
| C. | Middle ear |
| D. | Lungs |
| Answer» C. Middle ear | |
| 11. |
The discease in which transmembrane carrier for the chloride ion is not produced is |
| A. | Hyperchloesterolemia |
| B. | Cystic fibrosis |
| C. | Severe combined immunodeficiency syndrome |
| D. | AIDS |
| Answer» C. Severe combined immunodeficiency syndrome | |
| 12. |
The first eukarotes appeared about ______ years ago |
| A. | 1.5 billion |
| B. | 2.5 billion |
| C. | 3.5 billion |
| D. | 4.5 billion |
| Answer» B. 2.5 billion | |
| 13. |
The one which can break open a plasmid ring is |
| A. | Ligase enzyme |
| B. | Primase enzyme |
| C. | Restriction endonuclease |
| D. | ATP-ase enzyme |
| Answer» B. Primase enzyme | |
| 14. |
According to Lamarch evolution occurred as the result of |
| A. | Natural selection |
| B. | The theory of recapitulation |
| C. | Inheritance of acquired characters |
| D. | Over production |
| Answer» D. Over production | |
| 15. |
A genome is |
| A. | Appearance of an individual |
| B. | Genetic basis of few characters |
| C. | Full set of genes of an individual |
| D. | All of these |
| Answer» D. All of these | |
| 16. |
Genes will not be found in gene pairs in the |
| A. | Muscle cell of worm |
| B. | Uterine cells of dog |
| C. | Sperm cells of frog |
| D. | Guard cells of leaf |
| Answer» D. Guard cells of leaf | |
| 17. |
The red green colour blindness is sex linked recessive condition in man. A father with normal vision and a color blind mother world expect to produce. |
| A. | Color blind sons and daughter with normal vision |
| B. | Sons with normal vision and color blind daughters |
| C. | Color blind sons colour blind daughters and daughters with normal vision |
| D. | Sons with normal vision colour blind daughter and daughters with normal vision |
| Answer» B. Sons with normal vision and color blind daughters | |
| 18. |
Exposure to low temperature stimulates plants to flower. This is called |
| A. | Photoperiodism |
| B. | Thermotropism |
| C. | Vernalisation |
| D. | Thermoregulation |
| Answer» D. Thermoregulation | |
| 19. |
In humans the number of tetrads formed during mitosis is |
| A. | 23 |
| B. | 46 |
| C. | 0 |
| D. | 4 |
| Answer» D. 4 | |
| 20. |
The sequence of 3 bases on tRNA which is complementary to condon of mRNA is called |
| A. | Gene |
| B. | Anticodon |
| C. | Code |
| D. | Codon |
| Answer» C. Code | |
| 21. |
The basic structural unit of a chromosome is |
| A. | The centromere |
| B. | Nuceleosome |
| C. | Telomere |
| D. | Histone |
| Answer» C. Telomere | |
| 22. |
The cells present in testes and secrete testosterone are |
| A. | Sertoli cells |
| B. | Germinal cell |
| C. | Interstitial cells |
| D. | Spermatocyte |
| Answer» D. Spermatocyte | |
| 23. |
The type of learning in which there is loss or decrease in response to repeated stimuli |
| A. | Imprinting |
| B. | Habituation |
| C. | Latent learning |
| D. | Insight learning |
| Answer» C. Latent learning | |
| 24. |
The one which causes contraction of wall of the uterus during and after birth |
| A. | ADH |
| B. | MSH |
| C. | Oxytocin |
| D. | Progesterone |
| Answer» D. Progesterone | |
| 25. |
The one which is a weed killer |
| A. | IAA |
| B. | NAA |
| C. | 2 4-D |
| D. | GA |
| Answer» D. GA | |
| 26. |
Sleep movements are a type of |
| A. | Turgor movements |
| B. | Growth movements |
| C. | Tactic movements |
| D. | Paratonic movments |
| Answer» B. Growth movements | |
| 27. |
The one that stores calcium |
| A. | Sarcolemma |
| B. | Sarcoplasm |
| C. | Sarcoplasmic reticulum |
| D. | Cytosol |
| Answer» D. Cytosol | |
| 28. |
If a plasmolysed plant cell is placed in water the cell will |
| A. | Burst |
| B. | Be Killed |
| C. | Be deplasmolysed |
| D. | Show no change in it |
| Answer» D. Show no change in it | |
| 29. |
The major constituent of blood plasma is |
| A. | Protein |
| B. | NaCl |
| C. | Water |
| D. | Cholesterol |
| Answer» D. Cholesterol | |
| 30. |
The windpipe or trachea lies |
| A. | Dorsal to oesophagus |
| B. | Ventral to oesophagus |
| C. | Lateral to oesophagus |
| D. | None of these |
| Answer» E. | |
| 31. |
Scurvy and beri beri and caused by the deficiency of |
| A. | Vitamin B and C |
| B. | Vitamin B and D |
| C. | Vitamin C and B |
| D. | Vitamin A and B |
| Answer» D. Vitamin A and B | |
| 32. |
Kangaroo rat most probably would be found in |
| A. | Tropical rain forest |
| B. | Tundra |
| C. | Grass land |
| D. | Desert |
| Answer» E. | |
| 33. |
Competition between species will be greatest if they attempt to occupy the same |
| A. | Ecosystem |
| B. | Community |
| C. | Habitat |
| D. | Niche |
| Answer» E. | |
| 34. |
In most ecosystems the greatest amount of energy flows through the |
| A. | Secondary consumers |
| B. | Herbivores |
| C. | Carnivores |
| D. | Decomposers |
| Answer» C. Carnivores | |
| 35. |
Animals with greatest number of similarities are grouped together in a/an |
| A. | Phylum |
| B. | Family |
| C. | Genus |
| D. | Order |
| Answer» D. Order | |
| 36. |
Locomotory structures are not found in which of the following group |
| A. | Amoebas |
| B. | Zooflagellates |
| C. | Ciliates |
| D. | Apicomplexans |
| Answer» E. | |
| 37. |
The cell wall of oomycetes is chiefly composed of |
| A. | Chitin |
| B. | Cellulose |
| C. | Lignin |
| D. | Proteins |
| Answer» C. Lignin | |
| 38. |
One celled green ptotists are included in |
| A. | Monera |
| B. | Algae |
| C. | Slime molds |
| D. | Plants |
| Answer» C. Slime molds | |
| 39. |
The one which is present in all aerobic species |
| A. | Cytohrome c |
| B. | Cytochrome a |
| C. | Cytochrome a3 |
| D. | Cytochrome b |
| Answer» B. Cytochrome a | |
| 40. |
The one which is incorrect pair |
| A. | Sori - Indusium |
| B. | Arthrophytes - Jointed |
| C. | Dichotomous - Vernation |
| D. | Lycopods - Ground pries |
| Answer» D. Lycopods - Ground pries | |
| 41. |
Double fertilization occurs in |
| A. | All plants |
| B. | All seed plants |
| C. | Gymnosperms |
| D. | Angiosperms |
| Answer» E. | |
| 42. |
Amphoixus is a |
| A. | Chordate |
| B. | Protochordate |
| C. | Lower chordate |
| D. | All of these |
| Answer» E. | |
| 43. |
Adult birds normally possess only one functional |
| A. | Ureter |
| B. | Ovary |
| C. | Lung |
| D. | Testis |
| Answer» C. Lung | |
| 44. |
The food of hydra consists of |
| A. | Humus |
| B. | Detritus |
| C. | Dead microscopic animals |
| D. | Small crustaceans |
| Answer» E. | |
| 45. |
The unicellular organisms ingest large molecules into their cytoplasm from the external environment without previously digesting them. This process is called |
| A. | Diffusion |
| B. | Osmosis |
| C. | Phagocytosis |
| D. | Plasmolysis |
| Answer» D. Plasmolysis | |
| 46. |
Membranes of the grane are sites where |
| A. | Oxygen is stored |
| B. | Food is stored |
| C. | Sunlight is trapped |
| D. | CO2 is stored. |
| Answer» D. CO2 is stored. | |
| 47. |
The simplest of oxygen producting photosynthetic organisms are |
| A. | Algae |
| B. | Bacteria |
| C. | Cyanobacteria |
| D. | Chlamydomonas |
| Answer» D. Chlamydomonas | |
| 48. |
Protein coasts of viruses are synthesized in |
| A. | Lytic cycle |
| B. | Lysogenic cycle |
| C. | Both a & b |
| D. | All of these |
| Answer» B. Lysogenic cycle | |
| 49. |
Mycoplasmas have been included in bacteria because |
| A. | Do not have a cell wall |
| B. | Are heterotrophic |
| C. | Lack membrane bounded organelles |
| D. | Reproduce by binary fission |
| Answer» D. Reproduce by binary fission | |
| 50. |
Yeasts reproduce asexually by forming |
| A. | Asci |
| B. | Basidia |
| C. | Both a & b |
| D. | Buds |
| Answer» E. | |