1) The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in a) cytoplasm b) mitochondria c) chloroplast 2) Glycolysis process occurs in which part of the cell? a) Cytoplasm b) Nucleus c) Mitochondria 3) Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps? a) Ethanol + Carbon dioxide + Energy b) Lactic acid + Energy 4) Breaking of pyruvate using oxygen takes place in the ………. . a) Mitochondria  b) Cytoplasm 5) Rings of cartilage are present in the wind pipe to ensure that the ………. . a) prevent their collapse when air is not passing through them.  b) The cartilages are felxible tissues, that support the trachea while still allowing it to move and flex during breathing. c) Both a and b 6) The correct sequence of anaerobic respiration – a) Glucose → Pyruvate → Ethanol + Carbon-Dioxide b) Glucose → pyruvate → lactic acid  7) Write the correct sequence of air passage involved in inhalation? a) larynx→ Nostrils → Pharynx → lungs  b) nostrils→ Pharynx→ larynx→ Trachea → alveoli  c) nasal passage → larynx → Trachea → Pharynx→ Alveoli  d) None  8) During respiration exchange of gases takes place in _____. a) Trachea and larynx b) alveoli of lungs c) Alveoli and throat  d) Throat and larynx  9) Which of the following statement(s) is (are) true about respiration? a) During inhalation, ribs move inward and the diaphragm is raised b) In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air sacs  c) Haemoglobin has greater affinity for carbon dioxide than oxygen Alveoli does not help in increasing surface area for exchange of gases

Biology

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