Practice Test

Q1) Assertion :
When air is passed through lime water, lime water turns milky.
Reason :
Air contains 78 % nitrogen and 21 % oxygen. Show Answer

Q2) Assertion :
Veins have thin walls to collect blood from different organs.
Reason :
Blood in veins are not under pressure. Show Answer

Q3) Assertion :
Human being has a complex respiratory system.
Reason :
Human skin is impermeable to gases. Show Answer

Q4) Assertion :
All proteins in our food are digested in small intestine only.
Reason :
The protein digesting enzymes are released onto small intestine. Show Answer

Q5) Assertion :
Human heart does not allow mixing of oxygen reach blood with carbon dioxide reach blood.
Reason :
Human heart has different chambers. Show Answer

Q6) Which of the following statements about the autotrophs is incorrect? Show Answer

Q7) In which of the following groups of organisms, food material is broken down outside the body and absorbed? Show Answer

Q8) Which is the correct sequence of parts in human alimentary canal? Show Answer

Q9) If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected? Show Answer

Q10) Select the correct statement. Show Answer

Q11) The autotrophic mode of nutrition requires Show Answer

Q12) The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct one. Show Answer

Q13) A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains. Show Answer

Q14) The breakdown of pyruvate to give carbon dioxide, water and energy takes place in Show Answer

Q15) The correct sequence of anaerobic reaction in yeast is Show Answer

Q16) Which of the following statement(s) is (are) correct?
(i) Pyruvate can be converted into ethanol and carbon dioxide by yeast.
(ii) Fermentation takes place in aerobic bacteria.
(iii) Fermentation takes place in mitochondria.
(iv) Fermentation is a form of anaerobic respiration. Show Answer

Q17) During deficiency of oxygen in tissue of human beings, pyruvic acid is converted into lactic acid in the Show Answer

Q18) Which of the following take place after we exercise? Show Answer

Q19) Which of these statements is correct about alveoli? Show Answer

Q20) As air passes through the nasal cavity, it is Show Answer

Q21) What prevents back flow of blood inside the heart during contraction? Show Answer

Q22) Single circulation. i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by Show Answer

Q23) The blood leaving the tissues becomes richer in Show Answer

Q24) The xylem in plants are responsible for Show Answer

Q25) Which of the following statement(s) is (are) true about heart?
(i) Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs.
(ii) Left ventricles pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs.
(iii) Left atrium transfers oxygenated blood to right ventricles which sends it to different body parts.
(iv) Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body. Show Answer

Q26) In which of the following vertebrate group/ groups, heart does not pump oxygenated blood to different parts of the body? Show Answer

Q27) Choose the correct statement that describes arteries. Show Answer

Q28) Which of these statements is correct about the function of blood? Show Answer

Q29) The filtration units of kidneys are called Show Answer

Q30) The kidneys in human beings are a part of the system for Show Answer

Q31) Which of the following is the structural and functional unit of the excretory system? Show Answer

Q32) Choose the correct path of urine in our body: Show Answer

Q33) Which of the following substances are removed from blood in the kidneys? Show Answer

Q34) Each nephron has a cup shaped upper end called ______, which contains a ______. Show Answer

Q35) Which of the following is used artificially to remove nitrogenous waste products from the blood? Show Answer

Q36) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): HCl converts pepsinogen into active enzyme pepsin.
Reason (R): Pepsin converts protein into proteoses and peptones. Show Answer

Q37) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Digestion breaks large complex molecules to simple smaller molecules which can be easily absorbed.
Reason (R): Digestion is necessary for the absorption of all molecules. Show Answer

Q38) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Muscles of stomach wall possess thick layers of muscle fibers.
Reason (R): These muscles help in mixing the food with the enzyme present in the alimentary present in the alimentary canal. Show Answer

Q39) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Lipases help in emulsification of fats.
Reason (R): Lipases hydrolyses fats and oils. Show Answer

Q40) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Photosynthesis is an anabolic process.
Reason (R): The process of Photosynthesis occurs in chlorophyll. Show Answer

Q41) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Energy is used during the process of respiration.
Reason (R): Respiration stores energy in the form of ATP. Show Answer

Q42) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Humans are not truly aerobic.
Reason (R): They produce lactic acid anaerobically. Show Answer

Q43) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): In humans, there is a complex respiratory system.
Reason (R): Human skin is impermeable to gases. Show Answer

Q44) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Alveoli contain an extensive network of blood vessels.
Reason (R): Alveoli is the site where exchange of gases occurs. Show Answer

Q45) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): The muscular walls of ventricles are thicker than auricles.
Reason (R): This helps in preventing the back flow of blood. Show Answer

Q46) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): In human heart, there is no mixing of oxygenated and deoxygenated blood.
Reason (R): Valves are present in the heart which allows movement of blood in one direction only. Show Answer

Q47) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Valves are present in the arteries.
Reason (R): Arteries carry oxygenated blood from heart to different body parts except pulmonary artery. Show Answer

Q48) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Plants have low energy needs.
Reason (R): Plants bodies have large proportion of dead cells. Show Answer

Q49) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Human body produce highly toxic substance, which if not eliminated may cause the death.
Reason (R): Excretory substance removes nitrogenous waste from the body. Show Answer

Q50) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Excretory unit if kidneys are nephrons.
Reason (R): It has no role in secretion of urine. Show Answer

Q51) In which of the following group of organisms, food material is broken down outside the body and absorbed ? Show Answer

Q52) A student covered a leaf from a destrached plant with a black paper strip and kept it in the garden outside his house in fresh air. In the evening, he tested the covered portion of the leaf for the presence of starch. By doing so the student was trying to show that : Show Answer

Q53) A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains : Show Answer

Q54) If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will not take place properly ? Show Answer

Q55) Bile from the liver is received in which part of the alimentary canal ? Show Answer

Q56) In which part of alimentary canal food is finally digested ? Show Answer

Q57) Choose the function of pancreatic juice from the following : Show Answer

Q58) The pancreatic juice does not contain one of the following enzymes. Show Answer

Q59) The kidneys in human beings are a part of the system for : Show Answer

Q60) The opening and closing of stomatal pores depends upon : Show Answer

Q61) In human digestive system the enzymes pepsin and trypsin are secreted respectively by : Show Answer

Q62) Which of the following is the correct statement regarding bile ? Show Answer

Q63) Which of the following component of our food is digested by an enzyme which is present in saliva as well as in pancreatic juice ? Show Answer

Q64) Where are proteins first digested in the alimentary canal ? Show Answer

Q65) Which is the first enzyme to mix with food in the digestive tract ? Show Answer

Q66) Which of the following statements are correct ?
(I) Pyurvate can be broken down into ethanol and carbon dioxide by yeast
(II) Fermentation takes place in aerobic bacteria
(III) Fermentation takes place in mitochondria
(IV) Fermentation is a form of anaerobic respiration Show Answer

Q67) Choose the correct statement that describe arteries : Show Answer

Q68) The autotrophic mode of nutrition required : Show Answer

Q69) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Haemodialysis can save the life of patients with kidney failure.
Reason (R): Waste products like urea can be removed from the blood by Haemodialysis. Show Answer

Q70) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): In humans, major amount of water is absorbed by the tubular part of nephron.
Reason (R): Absorption of water depends on the dissolved waste to be excreted from the body. Show Answer

Q71) The role played by the gall bladder in human body is Show Answer

Q72) Removal of gall bladder Show Answer

Q73) Which of the following statement is correct about bile? Show Answer

Q74) Which part of alimentary canal receives bile from the liver? Show Answer

Q75) What is the function of bile salt in the small intestine? Show Answer

Q76) Which of these correctly represent the labels B,C,D and E? Show Answer

Q77) The secretion that is released by label C is: Show Answer

Q78) Name the digestive juice that lacks enzyme but helps in digestion. Show Answer

Q79) The digestion of food starts in Show Answer

Q80) In case of diarrhoea, which major process does not takes place normally in region F? Show Answer

Q81) The breakdown of pyruvate to give carbon dioxide, water and energy takes place in : Show Answer

Q82) When air is blown from mouth into a test tube containing lime water, the lime water turned milky due to the presence of : Show Answer

Q83) During deficiency of oxygen in tissues of human beings pyruvic acid is converted into lactic acid in : Show Answer

Q84) The correct path of urine flow in our body is : Show Answer

Q85) During respiration exchange of gases takes place in : Show Answer

Q86) The xylem in plants are responsible for : Show Answer

Q87) Assertion :
Presence of HCl in stomach is necessary for the process of digestion.
Reason :
HCl kills and inhibits the growth of bacteria in the stomach. Show Answer

Q88) Assertion :
Left atrium possesses the thickest muscles.
Reason : Left atrium receives oxygenated blood from the lungs. Show Answer

Q89) Assertion :
The rate of photosynthesis will be lowered if the leaves are coated with oil.
Reason :
Stomata gets blocked and thus gaseous exchange is affected. Show Answer

Q90) Assertion :
Doctors can tell by counting the pulse rate and listening to heart whether a person a is well or not.
Reason :
Pulse rate and heart beats change according to the condition of our heart. Show Answer

Q91) Assertion :
Urinary bladder and ureters are lined by transitional epithelium.
Reason :
Ureters carry the urine to urinary bladder where it is stored temporarily. Show Answer

Q92) Assertion :
Aerobic animals are not truly aerobic.
Reason :
They produce lactic acid anaerobically. Show Answer

Q93) Assertion :
The effect of root pressure in transport of water is more important at night.
Reason :
During day, stomata is open, transpiration takes place which helps in transport of water. Show Answer

Q94) Assertion :
Dark phase is independent of light, hence called light independent phase.
Reason :
Dark phase takes place at night. Show Answer

Q95) Assertion :
Blood pressure of a normal adult is 120/80.
Reason :
Blood pressure is measured by sphygmomanometer. Show Answer

Q96) Assertion :
Pancreatic amylase digests starch to maltose. Reason :
Pancreatic amylase breaks the peptide bond of protein. Show Answer

Q97) What is the name of the pigment that should be filled in the box 1 ? Show Answer

Q98) What is the thing that plants absorb through their roots and should be filled in box 2 to complete the picture ? Show Answer

Q99) An appropriate entry for the box 3 shown in the figure is : Show Answer

Q100) Final outputs from the photosynthesis, to be filled in boxes 4 and 5, are : Show Answer

Q101) Overall, what is the energy conversion summary in the process of photosynthesis ? Show Answer

Q102) The given picture shows a part of : Show Answer

Q103) Food taken in is processed to generate particles, which are small and of the same texture through : Show Answer

Q104) Biological catalysts which help in food disintegration are also known as : Show Answer

Q105) Digestion functions are taken care of by the gastric glands present in the wall of the stomach by releasing the following : Show Answer

Q106) Protein, carbohydrate, and fat components of food are completely digested in the : Show Answer

Q107) The energy released during cellular respiration is immediately used to synthesise a molecule called .... which is used to fuel all other activities in the cell. Show Answer

Q108) The ultimate breakdown products of glucose in our body are : Show Answer

Q109) Which one of the following statements is not true ? Show Answer

Q110) Air passages within the lungs terminate in structures called : Show Answer

Q111) What is the function of rings of cartilage present in our throat ? Show Answer

Q112) Blood that is brought back to the heart is rich in : Show Answer

Q113) Which one of the two, atria or ventricles, has thicker muscular walls ? Show Answer

Q114) Blood is pumped out to the body when : Show Answer

Q115) Which one of the statements given below is not true ? Show Answer

Q116) The force that blood exerts against the wall of a vessel is called Show Answer

Q117) Plant transport systems move raw materials from roots : Show Answer

Q118) The loss of water in the form of vapour the aerial parts of the plant is known as : Show Answer

Q119) Tissues responsible for movement of water and minerals from roots to the other parts of plant are known as : Show Answer

Q120) Phloem tissues transport Show Answer

Q121) Which of the processes does not involve the use of energy ? Show Answer

Q122) In humans, chemical digestion is a accomplished by enzyme action that begins in the mouth and ends in the Show Answer

Q123) Which of the following is the correct order for process of nutrition ? Show Answer

Q124) In which organ does the first digestion of starch occur in humans ? Show Answer

Q125) Which of the following converts starch to glucose, proteins to amino acids and fats to glycerol ? Show Answer

Q126) Bile juice does not contain any enzyme but bile salts are important for digestion and absorption of fats. Why ? Show Answer

Q127) Identify X, Y and Z Show Answer

Q128) The process X occurs in _____ and Y occurs in _____ part of cell. Show Answer

Q129) In which of these organisms the process Z takes place? Show Answer

Q130) In which part of human body do the process Z takes place? Show Answer

Q131) Where does aerobic respiration occur in a cell? Show Answer

Q132) The balloon like structures present in 'S' is: Show Answer

Q133) Which of these organs is surrounded by cartilaginous rings? Show Answer

Q134) Which of these statements is incorrect regarding human lungs? Show Answer

Q135) Trachea is divided into two smaller tubes called _______. Show Answer

Q136) Which of these is the function of balloon like structure present in lungs? Show Answer

Q137) Identify the part 1 in excretion. Show Answer

Q138) Which of these is the structural and functional unit of part 2? Show Answer

Q139) How can we purify the blood by artificial methods? Show Answer

Q140) The main waste present in the urine is: Show Answer

Q141) Choose the correct path of urine in our body: Show Answer

Q142) Which of these correctly represents the label A, B, C and D in the above passage? Show Answer

Q143) Which chamber of human heart contain oxygenated blood? Show Answer

Q144) What is the correct route of blood in a human? Show Answer

Q145) What prevents back flow of blood inside the heart during contraction? Show Answer

Q146) Assertion (A): Human heart does not allow mixing of oxygen rich blood with carbon dioxide rich blood.
Reason (R): Human heart has different chambers. Show Answer

Q147) Which of the following would help obtain starch free leaves in the plant? Show Answer

Q148) After a period of illumination, the leaves were boiled in alcohol to make them colourless. Which of the following could be used to test the end product stored in the leaves? Show Answer

Q149) Some of the starch free leaves were coated with wax on both the surfaces. The plant was maintained under normal environmental conditions. At the end of the experiment, the wax coated leaves are likely to show _____. Show Answer

Q150) During the morning hours, using a fine blade, an incision was made to the leaves such that the phloem tissue was cut open. Analysis of the liquid oozing out was found to contain high amount of: Show Answer

Q151) Autotropic organism include Show Answer

Q152) A gland not associated with the alimentary canal is Show Answer

Q153) Which of the following are chiefly digested in the stomach ? Show Answer

Q154) Large intestine in man mainly carries out Show Answer

Q155) The part of the digestive system where no digestion takes place is Show Answer

Q156) The fermentation of glucose by yeast normally yields Show Answer

Q157) A large quantity of one of the following is removed from our body by lungs: Show Answer

Q158) In respiration, air passes through Show Answer

Q159) A biochemical compound that readily combines with oxygen and distributes it throughout the human body is Show Answer

Q160) The process in which loss of water takes place is the form of water vapour through stomata is called Show Answer

Q161) In a closed circulatory system, blood is completely enclosed within Show Answer

Q162) Normal blood pressure (systolic / diastolic) Show Answer

Q163) Blood pressure is measured by an instrument called Show Answer

Q164) Which of the following statements is not correct? Show Answer

Q165) Oxygen liberated during photosynthesis comes from Show Answer

Q166) Glomerulus acts as dialysis bag. Show Answer

Q167) Bowman's capsule is found in heart. Show Answer

Q168) Peristaltic movement of muscles occurs in the mouth to push food into alimentary canal. Show Answer

Q169) The release of energy in aerobic process is less than in anaerobic process. Show Answer

Q170) The process in which the absorbed food is taken in by body cells and used for energy, growth and repair is called egestion. Show Answer

Q171) Before testing for starch, chlorophyll has to be removed from the leaf as it interferes in the test for starch due to its green colour. Show Answer

Q172) The length of small intestine in a human adult is about 3.5 m. Show Answer

Q173) Carbohydrates are the components of our food which is digested by an enzyme which is present in saliva as well as in pancreatic juice. Show Answer

Q174) Cytoplasm are the sites of aerobic respiration in the cells. Show Answer

Q175) The respiration in plants occurs at a fast rate whereas the respiration in animals occur at a much slower rate. Show Answer