The problem consists of several questions related to genetics and cell biology. The question of interest here is number 11. Given that a DNA molecule is used as a template, how many mRNA molecules are needed if each mRNA molecule has an average of $10^4$ nucleotides? The number of nucleotides in the given single strand of ADN is $3 \times 10^4$.

1. Problem Description

The problem consists of several questions related to genetics and cell biology. The question of interest here is number

1

1. Given that a DNA molecule is used as a template, how many mRNA molecules are needed if each mRNA molecule has an average of $10^4$ nucleotides? The number of nucleotides in the given single strand of ADN is $3 \times 10^4$.

2. Solution Steps

First, we need to recognize that the mRNA will have the same number of nucleotides as a single strand of DNA template.

Therefore the number of nucleotides in the mRNA $= 3 \times 10^4$.

Next, we can calculate the number of mRNA molecules:

$\text{Number of mRNA molecules} = \frac{\text{Total nucleotides in mRNA}}{\text{Average nucleotides per mRNA molecule}}$

$\text{Number of mRNA molecules} = \frac{3 \times 10^4}{10^4}$

$\text{Number of mRNA molecules} = 3$

3. Final Answer

The number of mRNA molecules needed is 3.