Parkinson’s disease (Paralysis agitans) (i) It develops due to deficiency of neuro transmitter, dopamine. The dopamine is not produced due to gradual destruction of neurons in the substantia nigra. (ii) It produces muscle tremors so called shaking palsy. (iii) There is lack of control and coordination of movements resulting in expression less face and stooping posture which gradually produces physical disability.

Correct Option: C

Parkinson’s disease (Paralysis agitans) (i) It develops due to deficiency of neuro transmitter, dopamine. The dopamine is not produced due to gradual destruction of neurons in the substantia nigra. (ii) It produces muscle tremors so called shaking palsy. (iii) There is lack of control and coordination of movements resulting in expression less face and stooping posture which gradually produces physical disability.

Mast cells are granulated leucocyte cells. Their granules contain histamine which is a vasodilator and heparin (an anticoagulant). These take part in body defence and allergic reaction. Vasopressin is released by posterior lobe of pituitary. Relaxin is released by placenta. Calcitonin is released by thyroid. Serotonin and melanin are released by intermediate lobe of pituitary gland.

Correct Option: B

Mast cells are granulated leucocyte cells. Their granules contain histamine which is a vasodilator and heparin (an anticoagulant). These take part in body defence and allergic reaction. Vasopressin is released by posterior lobe of pituitary. Relaxin is released by placenta. Calcitonin is released by thyroid. Serotonin and melanin are released by intermediate lobe of pituitary gland.

Hormones are chemical messengers formed by endocrine cells. Chemically hormones are of the following types: Amines–composed of amino group e.g., Melatonin.
Amino acids – eg. thyroxine Peptides – eg. insulin Steroids – eg. aldosterone

Correct Option: B

Hormones are chemical messengers formed by endocrine cells. Chemically hormones are of the following types: Amines–composed of amino group e.g., Melatonin.
Amino acids – eg. thyroxine Peptides – eg. insulin Steroids – eg. aldosterone

Epinephrine is synthesized from amino acid tyrosine. While estrogen and progesterone are modified steroids and prostaglandins are basically fat.

Correct Option: A

Epinephrine is synthesized from amino acid tyrosine. While estrogen and progesterone are modified steroids and prostaglandins are basically fat.

Microbial transformation is a biological process in which organic compounds are modified into reversible products. These biotransformation reactions are catalysed by purified enzymes present in microbial cells or pure cullures of micro-organisms. Cholesterol forms a major component of animal cell membranes liposomes (artificially created spheres surrounded by a phospholipid bilayer like a membrane). Cholesterol is used for microbial transformation (transgenics).

Correct Option: B

Microbial transformation is a biological process in which organic compounds are modified into reversible products. These biotransformation reactions are catalysed by purified enzymes present in microbial cells or pure cullures of micro-organisms. Cholesterol forms a major component of animal cell membranes liposomes (artificially created spheres surrounded by a phospholipid bilayer like a membrane). Cholesterol is used for microbial transformation (transgenics).