InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What are the necessary conditions for autotrophic nutrition and what are its by- products? |
| Answer» Autotrophic mode of nutrition involves the making of food by green plants by the process of photosynthesis. The conditions necessary for autotrophic nutrition are the presence of : Carbon dioxide, Water, Chlorophyll and Sunlight. Carbon dioxide combines with water in the presence of sunlight energy (absorbed by chlorophyll) to form food like glucose. This glucose carbohydrate is used for providing energy to the plant. A part of glucose is stored in plants as starch which can be used as a source of energy ehenever the plant need it. The major by-product of autotrophic nutrition (or photosynthesis) is oxygen gas which gose into the air. | |
| 2. |
What happens at the synapse between two neurons? |
| Answer» The synapse is a microscopic gap between any two adjacent neurons. Electrical impulses (or nerve impulese) carrying messages pass over the synapse when going one neuron to another. Actually, synapse between two neurons acts as a one-way valve which allows electrical impulses to pass in one direction only. This happens acts as follows : When an electrical impulse coming from the receptor reaches the end of the axon of sensory neuron, then the electrical impulse coming from the receptor reaches the end of the axon of sensory neuron, then the electrical impulse releases tiny amount of a chemical substance (called neurotransmitter substance) into the synapse (or gap) between two adjacent neurons. This chemical substance crosses the synapse (or gap) and starts a similar electrical impulse in the dendrite of the next neuron. In this way, the electrical impulses (or messages) are from one neuron to the next across the synapse. | |
| 3. |
The kidneys in human beings are a part of the system forA. nutrition.B. excretion.C. respiration.D. transportation |
| Answer» Correct Answer - excretion. | |
| 4. |
Define the Proteins |
| Answer» Proteins are the macromolecules formed by bonding together many amino acids. | |
| 5. |
Choose the forms in which most plants absorb nitrogen (i) Proteins ,(ii) Nitrates and Nitrites (iii) Urea (iv) Atmospheric nitrogenA. (i) and (ii)B. (ii) and (iii)C. (iii) and (iv)D. (i) and (iv) |
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Answer» Correct Answer - b Nitrogen is an essential element used in the synthesis of proteins and other compounds. This is takes up in the from of inorganic nitriates or nitrites. Sometimes it is taken up as organic compounds i.e., urea which have been prepared by bacteria from atmospheric nitrogen. |
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| 6. |
Process throuth which excess of proteins are converted into other useful substances like glucose |
| Answer» Gluconeogensis | |
| 7. |
Excess of amino acids obtained from proteins are not stored in the body. |
| Answer» Correct Answer - True | |
| 8. |
Which hormone is released from pituitary of mother once the fetal development is completed ? |
| Answer» Oxytocin is the hormone released from pituitary of the mother , once fetal development is completed. | |
| 9. |
What are the components of the transport system in highly organised plants? |
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Answer» The two components of transport in highly organised plants are xylem and phloem. (i) Xylem tissue is made of dead cells in the form of xylem vessels and tracheids. It tranports water and dissolved minerals from roots to all the parts of the plant. (ii) Phloem tissue is made of living cells in the form of sieve tubes and companion cells. It transports food made in leaves by photosynthesis to all the parts of a plant. |
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| 10. |
Which of the following events does not occur in photosynthesis ?A. conversion of light energy into chemical energyB. reduction of carbon dioxide to carbohydratesC. oxidation of carbon to carbon dioxideD. absorption of light energy by chlorophyll |
| Answer» Correct Answer - C | |
| 11. |
The oxygen liberated during photosynthesis by green plants comes from :A. glucoseB. waterC. carbon dioxideD. chlorophyll |
| Answer» Correct Answer - B | |
| 12. |
what is the source of proteins ? What are they made up of ? |
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Answer» (i) Sources of proteins : Milk and milk products, eggs , meat , legumes and pulses. (ii) Proteins are made up of amino acids. |
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| 13. |
The phloem tissue in plants is responsible for the transport of :A. waterB. water and mineralsC. sugarD. all of the above |
| Answer» Correct Answer - C | |
| 14. |
what happens to the rate of photosynthesis during cloudy daysA. IncreaseB. DecreaseC. UnchangedD. All of the above |
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Answer» Correct Answer - B |
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| 15. |
What is pedicel ? |
| Answer» The stalk present in a flower for its support is called as pedicel . | |
| 16. |
What are sessile flowers ? |
| Answer» Flowers with absence of stalk are called as sessile flowers. | |
| 17. |
what will happens to the rate of photosynthesis when there is no rainfall in areaA. IncreaseB. UnchangedC. DecreaseD. None of the above |
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Answer» Correct Answer - B |
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| 18. |
Flowers with stalk are called as sessile. |
| Answer» False . Flowers with stalk are called pedicellate. | |
| 19. |
What happens to the cells of injured tissue ? |
| Answer» The cells of the injured tissue start dividing and increase in numbers to repair and heal the injured tissue. | |
| 20. |
Do the plants get injured when we pluck the flowers ? How are those wounds healed ? |
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Answer» (i) Yes, plants get injured when we pluck flowers. (ii) The wounds are healed by formation of new cells by cel division. |
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| 21. |
Why is diffusion insufficient to meet the oxygen requirements of multi- cellular organisms like humans? |
| Answer» Unlike the unicellular orgnism, the multi-cellular organisms have complex body structures with specialized cells and tissues to perform various necessary functions of the body. Since these cells are not in direct contant with surrounding environment so, simple diffusion connot meet the oxygen requirement of all these cells. | |
| 22. |
The gap between two neurons is called aA. dendriteB. synapseC. axonD. impulse |
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Answer» Correct Answer - B synapse. |
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| 23. |
Write the full form of RuBisCO |
| Answer» Ribulose - 1, 5 - Bisphosphate Carboxylase Oxygenase | |
| 24. |
Which of the following statements (s) is (are) correct ? (i) Pyruvate can be converted into ethanol and carbon dioxide by yeast (ii) Fermantation takes place in aerobic bacteia (iii) Fermantation takes place in mitochondria (iv) Fermentation is a form of anaerobic respirationA. (i) and (iii)B. (ii) and (iv)C. (i) and (iv)D. (ii) and (iii) |
| Answer» Correct Answer - C | |
| 25. |
The breakdown of pyruvate to give carbon dioxide, water and energy takes place inA. cytoplasmB. mitochondriaC. chloroplastD. nucleus |
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Answer» Correct Answer - B mitochondria. |
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| 26. |
The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct oneA. PepsinB. MucusC. Salivary amylaseD. Bile |
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Answer» Correct Answer - b The mucus is secreted in the gastric juice by the glands present in the stomach wall . It helps to protect the wall of stomach from its own secretions of hydrochloric acid . If mucus is not secreted, HCl will cause the erosion of inner lining of stomach leading to ulcer formation. Pepsin acts on proteins in the stomach . Salivary amylase is present in saliva, it acts on starch in the mouth. Bile helps in emulsification of fat in small intestine. |
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| 27. |
What is the role of the brain in reflex action? |
| Answer» Reflex action takes place in the spinal cord. Only the information that a reflex action has taken place goes on to reach the brain. | |
| 28. |
Which part of the brain maintains posture and equilibrium of the body? |
| Answer» Correct Answer - Cerebellum. | |
| 29. |
The xylem in plants are responsible forA. transport of waterB. transport of foodC. transport of amino acidsD. transport of oxygen |
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Answer» Correct Answer - A transport of water. |
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| 30. |
The kidneys in human beings are a part of the system for:A. nutritionB. respirationC. excretionD. transportation |
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Answer» Correct Answer - C excretion |
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| 31. |
The xylem in plants are responsible forA. transport of waterB. transport of amino acidsC. transport of foodD. transport of oxygen |
| Answer» Correct Answer - transport of water. | |
| 32. |
The filtration units of kidneys are calledA. ureterB. urethraC. neuronsD. nephrons |
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Answer» Correct Answer - d Nephrons are the filtration units of kidneys. It is the structural and functional unit of a kidney and has three functions - filtration , reabsorption and secretion. Urine from the kidney passes through a tube called urter , that carry ureter, that carry urine into the urinary bladder. The urethra is a canal that carries urine from bladder and expels it out of body. Neurons are the nerve cells and are functional units of nervous system. |
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| 33. |
The brain is responsible forA. thinkingB. regulating the heart beatC. blancing the bodyD. all of the above |
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Answer» Correct Answer - D all of the above. |
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| 34. |
Which type of chemical bonds are present between all atoms in a molecule of glucose ? |
| Answer» Covalent bonds are present between all the atoms in a molecule of glucose. | |
| 35. |
Which are the important life processes in living organisms ? |
| Answer» Control and co-ordination , respiration , growth , excretion , reproduction , nutrition and excretion are some of the important life processes in living organisms. | |
| 36. |
Accessory whorls in a flower . |
| Answer» Calyx and corolla. | |
| 37. |
Four floral whorls. |
| Answer» Calyx, corolla , androecium , gynoecium . | |
| 38. |
How many atoms of C, H and O are respectively present in a molecules of glucose ? |
| Answer» There are 6 atoms of C,12 atoms of H and 6 atoms of O present in a molecule of glucose `(C_(6)H_(12)O_(6))`. | |
| 39. |
Essential whorls in a flower . |
| Answer» Androecium and gynoecium | |
| 40. |
From where do we obtain lipids ? |
| Answer» We obtain lipids from milk, butter , cheese , oil, ghee, meat , nuts are oilseeds , etc. | |
| 41. |
What is the importance of halpoid cells ? |
| Answer» Why haploid cells or gametes fuse, they form a diploid zygote so that the chromosome number in the organism is restored . | |
| 42. |
For binary fission, Amoeba requires _________ parent cells.A. ThreeB. TwoC. oneD. zero |
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Answer» Correct Answer - C one |
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| 43. |
Under effect of that hormone, which organ of the female reproductive system starts to contract and thereby birth process (Parturition ) is facilitated ? |
| Answer» Uterus starts to contract under the effect of oxytocin hormone and facilitates parturition. | |
| 44. |
Does the parent cell exist after sexual reproduction fission ? |
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Answer» (i) In asexual reproduction - Fission , the mother cell divides into daughter cells as each daughter cell begins its life like a new individual . (ii) The parent cell thus do not exist after sexual reproduction - fission. |
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| 45. |
Hormones secreted by ovary of female reproductive system. |
| Answer» Estrogen and progesterone. | |
| 46. |
Genetic recombination occurs in______________ phase of prophase of meiosis I. |
| Answer» Pachytene, During Meiosis-I, in pachytene stage, recombination / crossing over, i.e. exchange of genetic material takes place between non-sister chromatids of homologous chromosomes. | |
| 47. |
Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds? |
| Answer» It is necessary to separate oxygenated and deoxygenated blood to maintain efficient supply of oxygen into the body. This system is essential in animals that have high energy need. For example, animals like mammals and brids which constantly use this energy to maintain their body temperature. | |
| 48. |
Observe the picture and tell and life process which you identified . |
| Answer» The life process observed it reproduction . | |
| 49. |
Oxygen is necessary for complete oxidation of glucose . |
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Answer» (i) Aerobic cellular respiration is the process by which cells use oxygen to help them convert glucose into eneryg. (ii) Without oxygen, glucose will be incompletely oxidized and very less energy (2ATP) is produced. (iii) In the presence of oxygen glricose is completely oxidised to produce more energy (38 ATP). (iv) Therefore, oxygen is necessary for complete oxidation of glucose. |
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| 50. |
The two main steps of cell division are _______ and _______ |
| Answer» Karyokinesis, Cytokinesis | |