Biology MCQS

611. The first hormone isolated (1902) was:
A. Thyroxine
B. Vasopressin
C. Secretin
D. Adrenaline

612. Metabolic rate in mammals is controlled by:
A. Pancreas
B. Liver
C. Thyroid
D. Pituitary

613. Islets of Langerhans are found in:
A. Liver
B. Spleen
C. Pancreas
D. Pituitary

614. Myxoedema in adults is caused due to:
A. Hyperthyroidism
B. Deficiency of PTH
C. Overproduction of PTH
D. Deficiency of thyroid hormone

615. Testosterone is secreted by:
A. Leydig cells
B. Sertoli cells
C. Histocyte
D. None of the above

616. HCG is secreted by:
A. Placenta
B. Ovary
C. Thymus
D. Thyroid

617. Diabetes mellitus is due to the deficiency of:
A. Insulin
B. LH
C. FSH
D. Glycogen

618. The sources of the oxygen that are released during photosynthesis are:
A. CO2
B. Water
C. Sugar
D. Pyruvic

619. Who first observed and thus hypothesized that new cells are formed from previously existing living cells?
A: Theodor Schwann and Schleiden
B: Rudolph Virchow
C: Louis Pasteur
D: Both b and c

620. In the Hardy-Weinberg formula P2 represents the frequency of_____________?
A: Recessive allele
B: Dominant allele
C: Homozygous dominant individual
D: Homozygous recessive individual