What is the function of thyroxine?
A. It increases the metabolic rate.
B. It raises blood sugar.
C. It stimulates the kidney to reabsorb water.
D. It stimulates protein synthesis.
Answer: A
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Amino acids are carried to the ribosomes to be incorporated into polypeptide chains by which molecule?
A) snRNA B) DNA C) rRNA D) tRNA E) mRNA
What makes up the axial skeleton?
A) the skull, vertebral column, and pelvis B) arms, legs, hands, and feet C) the skull, vertebral column, and rib cage D) shoulder and pelvic girdles
The process of spermatogenesis from primary spermatocyte to sperm:
A. takes about three weeks in the human. B. occurs when a male is an embryo, ceasing at birth. C. requires participation of Sertoli cells. D. occurs in the epididymis. E. occurs as the cells gradually travel between two closely attached Leydig cells.
Spermatogenesis and testosterone production are interdependent events, meaning that neither process can occur without the other
Indicate whether the statement is true or false.