Question

Suppose that for certain microRNA of size 20, the probability of a purine is binomially distributed with probability 0.7. Say there are 100 such microRNAs, each independent of the other.

a) The probability distribution is not binomial.

b) The probability of a purine is irrelevant for microRNA.

c) The distribution is binomial, and the mean number of purines is 14.

d) The distribution is binomial, and the mean number of purines is 7.

Answer 1

The given question is related to the distribution of purines in microRNA, which is a topic in biology. The distribution of purines in the given microRNA is binomial, and the mean number of purines is 14.

So option (C) is the correct answer.

Step-by-step explanation:

The given question is related to the distribution of purines in microRNA, which falls under the field of biology. The question asks about the probability distribution of purines in a certain microRNA. We are given that the microRNAs are of size 20 and that the probability of a purine is binomially distributed with a probability of 0.7.

To answer the question, we need to determine the mean number of purines in this binomial distribution. The mean of a binomial distribution is given by the formula µ = np, where n is the number of trials and p is the probability of success. Here, n = 20 (the size of the microRNA) and p = 0.7. Thus, the mean number of purines is 20 * 0.7 = 14.

Therefore, the correct answer is option (c) The distribution is binomial, and the mean number of purines is 14.