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.
| 101. |
Which of the following statement is incorrect about algae______________? |
| A. | Their zygote unlike plants is protected by parental tissue |
| B. | Their classification is based on pigment composition |
| C. | Most of them have different morphological forms in-different stages of their life cycle |
| D. | Almost all of them are aquatic |
| Answer» B. Their classification is based on pigment composition | |
| 102. |
Which of the following statement about the head of a chlorophyll molecule is incorrect? |
| A. | It is a porphyrin ring or tetrapyrrole ring structure |
| B. | It is flat, square and light absorbing |
| C. | Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen |
| D. | It is hydrophobic |
| Answer» E. | |
| 103. |
Which of the following statement about plants is incorrect? |
| A. | All are eukaryotes |
| B. | They are multicellular |
| C. | Non-motile organisms |
| D. | They Are heterotrophes |
| Answer» E. | |
| 104. |
Which of the following statement about osteoporosis is incorrect. |
| A. | It results from estrogen deficiency. |
| B. | Bone eating process takes over bone formation process. |
| C. | There is reduction of bone mass and change in chemical composition of the matrix |
| D. | It is common in old age |
| Answer» D. It is common in old age | |
| 105. |
Which of the following statement about neuron is incorrect___________________? |
| A. | They not only conduct impulses but also generate them |
| B. | They are not the only cellular component of nervous system |
| C. | They may show limited regenerative capabilities |
| D. | Like all the living cell, when they mature and divide to form similar cells |
| Answer» E. | |
| 106. |
Which of the following statement about Kingdom Protista is incorrect_______________? |
| A. | Their members have characteristics which separate them from other kingdoms |
| B. | They only include unicellular aquatic eukaryotic organisms |
| C. | They do not develop from Blastula or embryo |
| D. | They contain ancestors for fungi plants & animals |
| Answer» C. They do not develop from Blastula or embryo | |
| 107. |
Which of the following statement about Homeostasis is incorrect? |
| A. | There is a definite control system that regulates the homeostatic activities |
| B. | Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment |
| C. | Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment |
| D. | All are correct |
| Answer» C. Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment | |
| 108. |
Which of the following statement about filicinae a group of tracheophytes is incorrect_________________? |
| A. | They belong to sphenopsida |
| B. | They are seedless and their leaves are called fronds |
| C. | They live in shady and moist areas |
| D. | They show circinate vernation |
| Answer» B. They are seedless and their leaves are called fronds | |
| 109. |
Which of the following statement about fatigue is correct? |
| A. | The major event in it is accumulation of lactic acid. |
| B. | Lactic acid accumulation turns pH in acidic range leading to muscle ache. |
| C. | Ionic imbalance may also cause it. |
| D. | All of these |
| Answer» E. | |
| 110. |
Which of the following statement about eiliates in incorrect_____________? |
| A. | Contain mainly unicellular organisms |
| B. | Their contractile vacoule is respobsible for water regulation |
| C. | They are even capable of sexual reproduction |
| D. | Diploid nucleus being smaller is responsible for cells metabolism and growth while polyploidy nucleus functions in sexual process. |
| Answer» E. | |
| 111. |
Which of the following statement about dicots is incorrect _________________? |
| A. | They have 4 or 5 sepals and petals or their multiple |
| B. | They have parallel vein pattern on their leaves |
| C. | They are both herbaceous and woody |
| D. | Vascular bundles are ring shaped in their stems |
| Answer» C. They are both herbaceous and woody | |
| 112. |
Which of the following statement about conifers is correct? |
| A. | Stored excretory products in vacuoles, at a concentration that leads to crystal formation |
| B. | Accumulate waste in leaves, which fall in autumn |
| C. | Production of black wood in the center |
| D. | Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants |
| Answer» E. | |
| 113. |
Which of the following statement about an arthropod exoskeleton is incorrect? |
| A. | It permits gaseous exchange |
| B. | It contains joints, for the same purpose as present in human skeletal system |
| C. | It provides muscle attachment |
| D. | Like all the other types of exoskeleton, they lack sensation |
| Answer» C. It provides muscle attachment | |
| 114. |
Which of the following statement about alternation of generation in bryophytes is incorrect? |
| A. | It involves alternation of morphologically different generations |
| B. | Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition. |
| C. | Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization |
| D. | Spore formation occurs through meiosis |
| Answer» D. Spore formation occurs through meiosis | |
| 115. |
Which of the following statement about AIDS is incorrect: |
| A. | is a host specific disease |
| B. | An infected mother cannot pass the virus to her baby. |
| C. | Results in enlargement of lymph nodes |
| D. | Can be prevented. |
| Answer» C. Results in enlargement of lymph nodes | |
| 116. |
Which of the following represents osmoregulatory steps taken by hydrophytes? |
| A. | Increases transpiration by increasing the surface area of the leave |
| B. | Small and thick leaves to decrease the surface area proportional to the volume of the leave |
| C. | Stomata closing in sufficient supply, and opening in restricted supply of water |
| D. | None of these |
| Answer» B. Small and thick leaves to decrease the surface area proportional to the volume of the leave | |
| 117. |
Which of the following relationship is NOT an example of symbiosis? |
| A. | Rhizobium and leguminous plants |
| B. | Marchantia sporophyte and gametophyte |
| C. | Algae and fungi in a lichen |
| D. | Mycorrhizal fungi and tree roots |
| Answer» C. Algae and fungi in a lichen | |
| 118. |
Which of the following proteins have role in heredity? |
| A. | Chromo-proteins |
| B. | Lipo-proteins |
| C. | Phospho-proteins |
| D. | Nucleo-proteins |
| Answer» E. | |
| 119. |
Which of the following promotes growth in plants? |
| A. | Photorespiration |
| B. | Calvin cycle |
| C. | Both of these |
| D. | None of these |
| Answer» C. Both of these | |
| 120. |
Which of the following polysaccharide is called animal starch_________________? |
| A. | Starch |
| B. | Glycogen |
| C. | Cellulose |
| D. | None of these |
| Answer» C. Cellulose | |
| 121. |
Which of the following plays the major role in providing support to young herbaceous parts of the plant? |
| A. | Living cells of epidermis with higher turgor pressure |
| B. | Living cells of cortex and pith with higher turgor pressure |
| C. | Collenchyma cells |
| D. | All of these |
| Answer» E. | |
| 122. |
Which of the following plant group first formed true leaves________________? |
| A. | Psilopsida |
| B. | Lycopsida |
| C. | Sphenopsida |
| D. | Pteropsida |
| Answer» C. Sphenopsida | |
| 123. |
Which of the following pigment is Blue- green in colour? |
| A. | Chlorophyll a |
| B. | Chlorophyll b. |
| C. | Chlorophyll c |
| D. | Chlorophyll d. |
| Answer» B. Chlorophyll b. | |
| 124. |
Which of the following pathogen type cause disease that can be treated with antibiotics ? |
| A. | bacteria |
| B. | fungi |
| C. | virus |
| D. | none of these |
| Answer» B. fungi | |
| 125. |
Which of the following pairs of fins in a fish body are paired? |
| A. | Dorsal and ventral |
| B. | Pectoral and Pelvic |
| C. | Tail and anal |
| D. | All of these |
| Answer» C. Tail and anal | |
| 126. |
Which of the following organisms have Chitin as a major structural component of their cell wall________________? |
| A. | Prokaryotae |
| B. | Protoctista |
| C. | Plantae |
| D. | Fungi |
| Answer» E. | |
| 127. |
Which of the following organ is responsible for body metabolism? |
| A. | Kidney |
| B. | Liver |
| C. | Lungs |
| D. | Heart |
| Answer» C. Lungs | |
| 128. |
Which of the following organ is responsible for blood filtration: |
| A. | Liver |
| B. | Kidney |
| C. | Lungs |
| D. | Heart |
| Answer» C. Lungs | |
| 129. |
Which of the following openings have cilia? |
| A. | Nephrostome |
| B. | Nephridiopore |
| C. | Both of these |
| D. | None of these |
| Answer» B. Nephridiopore | |
| 130. |
Which of the following of bryophytes are the simplest one? |
| A. | Porella |
| B. | Funaria |
| C. | Anthocerus |
| D. | Polytrichum |
| Answer» B. Funaria | |
| 131. |
Which of the following occurs in anaerobic respiration but not in aerobic respiration? |
| A. | Release of CO2 |
| B. | Reduction of NAD |
| C. | Formation of ATP |
| D. | Production of ethanol from acetaldehyde |
| Answer» E. | |
| 132. |
Which of the following neuron has a single long dendron? |
| A. | Sensory neuron |
| B. | Motor neuron |
| C. | Associative neuron |
| D. | none of these |
| Answer» B. Motor neuron | |
| 133. |
Which of the following nephrons play important role in production of concentrated urine? |
| A. | Crotical |
| B. | Medullary |
| C. | Juxtramedullary |
| D. | None of these |
| Answer» D. None of these | |
| 134. |
Which of the following muscle is an antagonistic member of Biceps brachii? |
| A. | Bracheoradialis |
| B. | Brachialis |
| C. | Intercostals |
| D. | Triceps |
| Answer» E. | |
| 135. |
Which of the following mechanism explains development of anemia in Renal failure? |
| A. | Failure of bone marrow is accompanied with renal failure |
| B. | Destruction of RBC results from accumulated urea in the blood |
| C. | Chronicity of the disease is respobsible for anemia |
| D. | Failure of proper RBC synthesis, due to lack of chemical stimulation |
| Answer» E. | |
| 136. |
Which of the following marine fishes are considered direct descendents of fresh water ancestors? |
| A. | Hagfish |
| B. | Jelly Fish |
| C. | Star Fish |
| D. | Bony fishes |
| Answer» E. | |
| 137. |
Which of the following manufactures carbohydrates by the process of photosynthesis? |
| A. | chloroplast |
| B. | chromoplast |
| C. | leucoplast |
| D. | All of these |
| Answer» B. chromoplast | |
| 138. |
Which of the following light is least absorbed by the plants? |
| A. | Orange |
| B. | Red |
| C. | Blue |
| D. | Green |
| Answer» E. | |
| 139. |
Which of the following kidney stones are most common? |
| A. | Calcium oxalate |
| B. | Calcium phosphate |
| C. | Uric acid |
| D. | All of these |
| Answer» B. Calcium phosphate | |
| 140. |
Which of the following is used in brewing industry to promote malting_______________? |
| A. | Gibberellins |
| B. | Cytokinins |
| C. | Auxins |
| D. | Abscisic Acid |
| Answer» B. Cytokinins | |
| 141. |
Which of the following is true about hearts of earthworm? |
| A. | There are 5-7 pairs of heart |
| B. | They are present between 1-7th segments |
| C. | They are present lateral to the oesophagus |
| D. | They pump blood from ventral to dorsal vessel |
| Answer» D. They pump blood from ventral to dorsal vessel | |
| 142. |
Which of the following is the swiftest form of the locomotion? |
| A. | Plantigrade |
| B. | Digitigrade |
| C. | Unguligrade |
| D. | Hopping |
| Answer» D. Hopping | |
| 143. |
Which of the following is the smallest known virus: |
| A. | Hepatitis virus |
| B. | Retrovirus |
| C. | Polio virus |
| D. | Pox virus |
| Answer» D. Pox virus | |
| 144. |
Which of the following is the less important organ in human body? |
| A. | Hair |
| B. | Appendix |
| C. | Hip bone |
| D. | Navel |
| Answer» C. Hip bone | |
| 145. |
Which of the following is the empirical formula of chlorophyll b? |
| A. | C55H70O5N4Mg |
| B. | C55H72O6N4Mg |
| C. | C55H70O6N4Mg |
| D. | C55H72O5N4Mg |
| Answer» D. C55H72O5N4Mg | |
| 146. |
Which of the following is the correct sequence in the biological method? |
| A. | Observation?hypothesis?law?theory |
| B. | Observation?hypothesis?deduction?testing of deduction |
| C. | Hypothesis?observation?deduction?testing of deduction |
| D. | law?theory?deduction?observation |
| Answer» C. Hypothesis?observation?deduction?testing of deduction | |
| 147. |
Which of the following is the basic unit of classification___________? |
| A. | Species |
| B. | Genus |
| C. | Family |
| D. | Order |
| Answer» B. Genus | |
| 148. |
Which of the following is second largest part of the brain_______________? |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Thalamus |
| D. | Hypothalamus |
| Answer» C. Thalamus | |
| 149. |
Which of the following is responsible for Irish potato famine? |
| A. | Dinoflagellates |
| B. | Kleps |
| C. | Physarum polycephalum |
| D. | Phytophthora infestans |
| Answer» E. | |
| 150. |
Which of the following is present inside the vertebral column______________? |
| A. | Brain |
| B. | Spinal cord |
| C. | Both of these |
| D. | none of these |
| Answer» C. Both of these | |