If 50 base pairs model is 1 foot long, how long would this model have to be if it contained 3 billion base pairs (typical of a human cell?​

answer: 45

explanationyou have to add as well to be it could be

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.