NEET2012ZoologyChemical Coordination and IntegrationActual
Which one of the following pairs of chemical substances, is correctly categorised?
Options
- ACalcitonin and thymosin-Thyroid hormones
- BPepsin and prolactin-Two digestive enzymes secreted in stomach
- CTroponin and myosin-Complex proteins in striated muscles
- DSecretin and rhodopsin-Polypeptide hormones
Correct answer
C. Troponin and myosin-Complex proteins in striated muscles
Step-by-step solution
Striated muscle consists of large number of muscle fibres called myofibrils. Myofibrils are made up of actin and myosin protein. The actin or secondary myofilaments also possess troponin and tropomyosin protein. Thymosin hormone is secreted from thymus gland. Prolactin is a hormone secreted from anterior lobe of pituitary Rhodopsin is a pigment found in rod cells of eye.