Biology miscellaneous


  1. The presence of air bubble in blood stream is dangerous to life because









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    The presence of air bubble in blood, known as air embolism, occludes blood vessels. The flow of blood is obstructed causing strokes, heart attacks, pulmonary complications. An arterial air embolism is far more dangerous than a venous embolism since it prevents oxygenated blood from reaching the target organ and cause ischemia. It can lead to heart attack and death.

    Correct Option: C

    The presence of air bubble in blood, known as air embolism, occludes blood vessels. The flow of blood is obstructed causing strokes, heart attacks, pulmonary complications. An arterial air embolism is far more dangerous than a venous embolism since it prevents oxygenated blood from reaching the target organ and cause ischemia. It can lead to heart attack and death.


  1. Which cells in pancreas produce Insulin ?









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    The islets of Langerhans are the regions of the pancreas that contain cells that produce hormones. There are five types of cells in the islets of Langerhans: beta cells secrete insulin; alpha cells secrete glucagon; PP cells secrete pancreatic polypeptide; delta cells secrete somatostatin; and epsilon cells secrete ghrelin.

    Correct Option: D

    The islets of Langerhans are the regions of the pancreas that contain cells that produce hormones. There are five types of cells in the islets of Langerhans: beta cells secrete insulin; alpha cells secrete glucagon; PP cells secrete pancreatic polypeptide; delta cells secrete somatostatin; and epsilon cells secrete ghrelin.



  1. Magnesium is a constituent metal of









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    The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.

    Correct Option: A

    The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.


  1. Polio is caused by









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    Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus.Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva.

    Correct Option: B

    Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus.Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva.



  1. Which of the following plant hormones are incorrectly paired?









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    Abscisic acid is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.

    Correct Option: D

    Abscisic acid is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.