MCQOPTIONS
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MCQOPTIONS
This section includes 1212 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 901. |
four daughter cells are given to rise during the process of____________? |
| A. | meiosis |
| B. | mitosis |
| C. | cell division |
| D. | none of these |
| Answer» B. mitosis | |
| 902. |
Formation of heat shock proteins in plants results in___________? |
| A. | Elevation of temperature in cold conditions |
| B. | Embracing the enzymes and other proteins and prevent their denaturation |
| C. | Change the chemical nature of other proteins thus making them heat resistant |
| D. | Help in evaporative cooling |
| Answer» C. Change the chemical nature of other proteins thus making them heat resistant | |
| 903. |
For which of the following no preventive vaccine is available? |
| A. | HAV |
| B. | HBV |
| C. | HCV |
| D. | HEV |
| Answer» D. HEV | |
| 904. |
For the synthesis of 10g of glucose ______________ of energy is required? |
| A. | 717.6 Kcal |
| B. | 727 Kcal |
| C. | 737 Kcal |
| D. | 747 Kcal |
| Answer» B. 727 Kcal | |
| 905. |
Following possess bilateral symmetry as larva and radial symmetry as adult: |
| A. | Chordata |
| B. | Hydra |
| C. | Echinodermata |
| D. | Hemichordata |
| Answer» D. Hemichordata | |
| 906. |
Foliose lichen are_____________? |
| A. | Stem like |
| B. | Branching |
| C. | Leaf like |
| D. | Crust like |
| Answer» D. Crust like | |
| 907. |
Flagella originate from_______________? |
| A. | Cell membrane |
| B. | Cell wall |
| C. | Capsule |
| D. | Basal body |
| Answer» E. | |
| 908. |
Flagella are composed of________? |
| A. | micro tubules |
| B. | micro filaments |
| C. | intermediate filaments |
| D. | glycoproteins |
| Answer» B. micro filaments | |
| 909. |
Five kingdom classification was proposed by_____________? |
| A. | Carlous Linnaeus |
| B. | E-Chatton |
| C. | Robert Whittaker |
| D. | Lynn Margulis and Karlene Schwartz |
| Answer» D. Lynn Margulis and Karlene Schwartz | |
| 910. |
Fishes, most of the invertebrates and amphibians are examples of ________ animals? |
| A. | Endotherms |
| B. | Ectotherms |
| C. | Heterotherms |
| D. | Homeotherms |
| Answer» C. Heterotherms | |
| 911. |
First Actions spectrum was obtained by using__________? |
| A. | Algae |
| B. | Fungi |
| C. | Bacteria |
| D. | Spirogyra |
| Answer» E. | |
| 912. |
Final acceptor of electrons in respiratory chain is____________? |
| A. | NADH |
| B. | Cytochrome a3 |
| C. | Water |
| D. | Oxygen |
| Answer» E. | |
| 913. |
Fibrous capsule surrounding synovial joints may be thickened at some places to form: |
| A. | Synovial membrane |
| B. | Ligaments |
| C. | Muscles |
| D. | Tendon |
| Answer» C. Muscles | |
| 914. |
Fibers of the extracellular matrix is the characteristics of_______________? |
| A. | Plant cell wall |
| B. | Bacterial cell wall |
| C. | Cell membrane of bacteria |
| D. | Fluid mosaic model of cell membrane |
| Answer» E. | |
| 915. |
Ferns are included in__________? |
| A. | Psilopsida |
| B. | Lycopsida |
| C. | Sphenopsida |
| D. | Pteropsida |
| Answer» E. | |
| 916. |
Fatty acids containing 18 C atoms and a single double bond is____________? |
| A. | Saturated Fatty acid |
| B. | Unsaturated fatty acid |
| C. | Oleic Acid |
| D. | Plamitic acid |
| Answer» D. Plamitic acid | |
| 917. |
Far-red light promotes flowering in_______________? |
| A. | Short day plant |
| B. | Long day plant |
| C. | Day neutral plant |
| D. | None of these |
| Answer» B. Long day plant | |
| 918. |
Factory of Ribosomal systhesis is__________? |
| A. | Cytoplasm |
| B. | Nucleus |
| C. | Nucleolus |
| D. | Endoplasmic reticulum |
| Answer» D. Endoplasmic reticulum | |
| 919. |
Extremely long molecule of DNA that is tightly folded to fit inside the cell component is called_____________? |
| A. | Nucleus |
| B. | Chromosome |
| C. | Chromatid |
| D. | Chromatin body |
| Answer» E. | |
| 920. |
Extreme change in pH results in______________? |
| A. | Change in ionization of amino acids at the active site of the enzyme |
| B. | Change in the ionization of the substrate |
| C. | Denaturation of the enzyme |
| D. | Increase in the reaction rate |
| Answer» D. Increase in the reaction rate | |
| 921. |
Exposure to low temperature stimulates plants to flower. This is called___________? |
| A. | Photoperiodism |
| B. | Thermotropism |
| C. | Vernalisation |
| D. | Thermoregulation |
| Answer» D. Thermoregulation | |
| 922. |
Exoskeoeton of coelenterates terates is made up to__________? |
| A. | Calcium |
| B. | Silica |
| C. | Chitin |
| D. | Both A & B |
| Answer» B. Silica | |
| 923. |
Exoskeleton of a marine snail is composed of________________? |
| A. | CaPO4 |
| B. | CaCO3 |
| C. | CaSO4 |
| D. | SiO2 |
| Answer» C. CaSO4 | |
| 924. |
Excretory system of platyhlminthes consists of___________? |
| A. | Nephridia |
| B. | Flame cells |
| C. | Malpighian tubules |
| D. | Nephrons |
| Answer» C. Malpighian tubules | |
| 925. |
Excessive lactic acid is converted into __________ by liver? |
| A. | Glucose |
| B. | Fructose |
| C. | Sucrose |
| D. | Glycogen |
| Answer» E. | |
| 926. |
Excessive increase in temperature of medium causes the enzyme molecule to____________? |
| A. | Activate |
| B. | Unaffected |
| C. | Denatured |
| D. | None of these |
| Answer» D. None of these | |
| 927. |
Exceptionally the positive hydrostatic pressure generated by root pressure is about___________? |
| A. | 600 Kpa |
| B. | 800 Kpa |
| C. | 1000 Kpa |
| D. | 900 Kpa |
| Answer» C. 1000 Kpa | |
| 928. |
Examples of Rhodophytes are___________? |
| A. | Chondrus |
| B. | Polysiphonia |
| C. | Both of these |
| D. | Pinnularia |
| Answer» D. Pinnularia | |
| 929. |
Examples of Epigeal germination include _________ ? |
| A. | Maize |
| B. | Sword bean seed |
| C. | Broad bean seed |
| D. | Corn |
| Answer» C. Broad bean seed | |
| 930. |
Example of bacteria requiring low concentration of oxygen is__________? |
| A. | Campylobactor |
| B. | spirocheta |
| C. | E-coli |
| D. | Pseudomonas |
| Answer» B. spirocheta | |
| 931. |
Exact replica of chromosome refers to ___________? |
| A. | Chromatid |
| B. | Centromere |
| C. | Kinetochore |
| D. | Arms |
| Answer» B. Centromere | |
| 932. |
Euglena belongs to the kingdom___________? |
| A. | Fungi |
| B. | Monera |
| C. | Protista |
| D. | Non of them |
| Answer» D. Non of them | |
| 933. |
Equistem is an example of___________? |
| A. | Psilopsida |
| B. | Lycopsida |
| C. | Sphenopsida |
| D. | Prteropsida |
| Answer» D. Prteropsida | |
| 934. |
Epinasty is controlled by_____________? |
| A. | Gibberellins |
| B. | Abscisins |
| C. | Auxins |
| D. | Cytokinins |
| Answer» D. Cytokinins | |
| 935. |
Enzymes __________________ the activation energy of a chemical reaction? |
| A. | Increases |
| B. | Decreases |
| C. | Does not effect |
| D. | Increases or decreases depending upon individual enzyme |
| Answer» C. Does not effect | |
| 936. |
Enzyme present in the saliva is_____________? |
| A. | lipase |
| B. | trypsin |
| C. | ptyalin |
| D. | invertase |
| Answer» D. invertase | |
| 937. |
enzyme is_____________? |
| A. | bio catalyst |
| B. | hormone |
| C. | Gland |
| D. | None of these |
| Answer» B. hormone | |
| 938. |
Enzyme activity can also be charted through the __________ ? |
| A. | Rate of digestion |
| B. | Rate of reaction |
| C. | Level of pH |
| D. | Number of active sites |
| Answer» C. Level of pH | |
| 939. |
Enteron in coelenterates acts as___________? |
| A. | Digestive cavity |
| B. | Body cavity |
| C. | Transporting cavity |
| D. | all of these |
| Answer» E. | |
| 940. |
Enterobius vermicularis is commonly known as____________? |
| A. | Flatworm |
| B. | Pinworm |
| C. | Hook worm |
| D. | Tapeworm |
| Answer» C. Hook worm | |
| 941. |
Endoskeleton is secreted by? |
| A. | Ectoderm |
| B. | Endoderm |
| C. | Mesoderm |
| D. | All of these |
| Answer» D. All of these | |
| 942. |
Empty diatom cells are called___________? |
| A. | Raphe |
| B. | Valves |
| C. | Frustule |
| D. | Girdles |
| Answer» D. Girdles | |
| 943. |
Embryonic induction is caused by part developing from_____________? |
| A. | Endoderm |
| B. | Ectoderm |
| C. | Mesoderm |
| D. | Extraembryonic layers |
| Answer» D. Extraembryonic layers | |
| 944. |
Ecosystem not found in Pakistan is_____________? |
| A. | Tropical rain forest |
| B. | Temperate deciduous forest |
| C. | Grassland |
| D. | Tundra |
| Answer» B. Temperate deciduous forest | |
| 945. |
Ecological role of fungi as decomposers is only paralleled by_____________? |
| A. | Cyanobacteria |
| B. | Blue green algae |
| C. | Bacteria |
| D. | Virus |
| Answer» D. Virus | |
| 946. |
Ecdysone is_________________? |
| A. | An enzyme that digest endocuticle during an arthropodal ecdysis |
| B. | A newly formed exoskeleton in authropods |
| C. | A hormone that regulates moulting in arthropods |
| D. | A process that involves moulting |
| Answer» D. A process that involves moulting | |
| 947. |
Earthworm lives in___________? |
| A. | sea water |
| B. | moist soil |
| C. | fresh water |
| D. | none of these |
| Answer» C. fresh water | |
| 948. |
Earthworm is included in_____________? |
| A. | Kingdom Plantae |
| B. | Kingdom Protoctista |
| C. | Kingdom Monera |
| D. | Kingdom Animalia |
| Answer» E. | |
| 949. |
Earthworm is an example of ______________feeder? |
| A. | Detritus |
| B. | Fluid |
| C. | Macrophageus |
| D. | Filter |
| Answer» B. Fluid | |
| 950. |
Each turn of DNA contain ____________ nitrogenous base pairs? |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 25 |
| Answer» C. 20 | |