10 UMPTN Biology

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 1. The chemical reactions of the Krebs cycle are: 1. They occur under aerobic conditions 2. They occur in the mitochondria 3. They involve enzymes and coenzymes 4. One reaction occurs per mole of glucose The answer is C 2. Increased human activity results in an increase in 1. cellular nutrient consumption 

2. the number of mitochondria in the cell 3. oxygen consumption 4. the number of ribosomes The answer is B

3. Reflex impulses from receptors are transmitted sequentially to the effectors as follows: A. sensory neuron, connecting neuron, motor neuron, effector B. sensory neuron, synapse, motor neuron, effector C. motor neuron, synapse, sensory neuron D. sensory neuron, motor neuron, synapse, effector E. synapse, motor neuron, sensory neuron The answer is A 

4. The secretions of the islets of Langerhans function to 1. convert glucose into glycogen 2. convert glycogen into glucose 3. produce insulin 4. produce Trypsin The answer is A 

5. The following organs can function as endocrine glands: 1. Pancreas 2. Pituitary 3. Adrenals 4. Ovaries The answer is A 

6. The following are processes that occur in metabolism: 1. Glycolysis 2. Chemosynthesis 3. Respiration 4. Photosynthesis 5. Fermentation The processes that occur in carbohydrate catabolism are: A. 1, 2, 3 B. 1, 2, 4 C. 3, 4, 5 The answer is E 

7. Aerobic respiration produces more energy than fermentation BECAUSE Fermentation produces 2 ATP while respiration produces 26 ATP The answer is C 

8. The parasympathetic nervous system affects all organs of the body except: A. Blood vessel contraction B. Pupil constriction C. Increased salivary secretion D. Bone constriction E. Intestinal wall contraction The answer is A 

9. Obesity or extreme overweight This is common in adults due to abnormalities in: A. pituitary gland B. adrenal gland C. thyroid gland D. pancreas gland E. gonad gland The answer is C 

10. The light reactions in photosynthesis produce: 1. NADPH 2. Carbohydrates 3. ATP 4. Water The answer is B

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