Gene which inhibits cell cycle is -
(A) p53 (B) RB (C) p16 (D) Notch receptor
(A) Answer-A. p53Cell cycle inhibitorsCIP/KIP family - p21, p27, p57INK4a/ARF family - p161 NK4a, pl4ARFA G1 arrest can result simply by the p53 induced expression of p21 WAF1/CIP1/Sdi1 P53 also down regulates the expression of cyclin A, providing a secondary break on cell cycle progression into the through the S phase.