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Biomolecules · Question 64

AIPMT 2000MCQEasy📈 Topic in 0% papers+4−1
1

Which one is responsible for production of energy in bio-reaction?

  1. Thyroxine
  2. Adrenaline
  3. Oestrogen
  4. Progesterone

Answer

(1) Thyroxine

Solution

Thyroxine, the iodinated derivative of the amino acid tyrosine produced by the thyroid gland, controls the basal metabolic rate, i.e. the rate of oxidation of food in the cells that releases energy.

Adrenaline acts in emergency (fight-or-flight) responses, while oestrogen and progesterone are sex hormones.

∴ Thyroxine is responsible for production of energy in bio-reactions.

Answer: (1)

AIPMT 2000

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2

How do enzymes increase the rate of reactions?

  1. by lowering activation energy
  2. by increasing activation energy
  3. by changing equilibrium constant
  4. by forming enzyme substrate complex.
AIPMT 2000

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