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Life Processes Test - 52

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Life Processes Test - 52
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  • Question 1
    1 / -0
    Write the reaction number in front of the following.
    Reaction in plant cell which polymerizes glucose for storage

    Solution
    Only green plants and cyanobacteria can prepare their own food; by the process of photosynthesis they trap light energy and convert it into chemical energy in the form of glucose but stored in the form of starch by the polymerization. Thus, the correct answer is option A.
  • Question 2
    1 / -0
    Choose the correct statement with respect to the position of the kidneys.
    Solution
    In humans, the kidneys are located in the abdominal cavity. The right kidney is placed at a slightly lower level than the left kidney in order to accommodate the liver present on the right side.
    Therefore, the correct answer is option C.
  • Question 3
    1 / -0
    Write the reaction number in front of the following.
    Reaction in human muscles is

    Solution
    In animal cells also, like muscles during exercise, when oxygen is inadequate for cellular respiration pyruvic acid is reduced to lactic acid by lactate dehydrogenase and called as lactic acid fermentation represented by the reaction number 4. The reducing agent is NADH + H+^+ which is reoxidized to NAD+^+ in both the processes.
  • Question 4
    1 / -0

    Directions For Questions

    Correct the following sentence. 

    ...view full instructions

    Kidney has neurons for the digestive function.
    Solution
    The kidney is the excretory organ of the vertebrates. Each kidney has nearly one million complex tubular structures called nephrons, which are the functional units of the kidney and serve to filter wastes from the blood. 
    Thus, the correct answer is option B. 
  • Question 5
    1 / -0
    What statement is wrong about bile?
    Solution
    The bile secreted by the hepatic cells passes through the hepatic ducts and is stored and concentrated in a thin muscular sac called the gall bladder. The duct of gall bladder (cystic duct) along with the hepatic duct from the liver forms the common bile duct. The bile, pancreatic juice and the intestinal juice are the secretions released into the small intestine. The bile released into the duodenum contains bile pigments (bilirubin and biliverdin), bile salts, cholesterol and phospholipids but no enzymes. Bile helps in emulsification of fats, i.e., breaking down of the fats into very small micelles. Bile also activates lipases. Fats are broken down by lipases with the help of bile into di-and monoglycerides.
  • Question 6
    1 / -0
    In humans, the urinary bladder opens into
    Solution
    The urinary bladder is the organ that collects urine released by the kidneys before disposal through urination. Urine enters the bladder via ureters and exits to the outside via the urethra. 
    So, the correct answer is option B.
  • Question 7
    1 / -0
    Lymph differ from blood in possessing:
    Solution
    • Lymph differs from blood in possessing only WBC (Lymphocytes). 
    • Lymph is a colourless fluid that circulates throughout the lymphatic system. 
    • It contains white blood cells and certain proteins while RBCs and platelets are absent.
     So, the correct answer is option A.
  • Question 8
    1 / -0
    Which of the following events occurs in photosynthesis?
    Solution
    Photosynthesis is essentially an energy conversion process in which the energy from photons of light is trapped by plant pigment chlorophyll and is used to synthesize sugars. Thus, light energy is converted into chemical energy of sugar molecule.
    So, the correct answer is option A.
  • Question 9
    1 / -0
    Mammalian lungs are:
    Solution
    The lungs of mammals including those of humans are soft, spongy, elastic organs with the smooth shining surface. Lungs are not hollow like balloons but are made of spongy, flexible tissue that inflates, when filled with air.
    So, the correct answer is option B.
  • Question 10
    1 / -0
    The cells in the body, receive oxygen from the blood via _________.
    Solution
    The oxygenated blood from the heart is transported to different parts of the body via arteries. On reaching an organ or tissue, the artery divides into smaller and smaller vessels to bring the blood in contact with all the individual cells. These tiny vessels are called capillaries. They are the site of the exchange of materials between cells and the blood.
    So, option B is correct.
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