Suggested problems


March 8, 2023, 11:02 p.m. by antonana

A Rapid Introduction to Molecular Biology

Figure 1. A 1900 drawing of onion cells at different stages of mitosis by Edmund Wilson.

Making up all living material, the cell is considered the building block of life. The nucleus, a component of most eukaryotic (nonbacterial) cells, has been known to be the hub of cellular activity for 150 years. Seen under a light microscope, the nucleus appears to simply be a darker region of the cell, but as we increase magnification, we find a hodgepodge of substances in the nucleus, which undergoes a flurry of activity leading up to and during mitosis, or cell division; see Figure 1.



Hello. I enjoyed playing Melbet so much that I decided to download it to my phone as well. I found this website . And then I read about how to log in to my account. Here you can download it for Android (APK) and iOS, so you don't have to worry about it. Now I often want to play this app and enjoy it.You can do it too. Have a nice day)))

Given: A DNA string $s$ of length at most 1000 nucleotides.

Return: Four integers corresponding to the number of times that the symbols A, C, G, and T occur in $s$.

Sample Dataset


Sample Output

20 12 17 21