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8

OK, let's set up a specific hypothetical situation so we have some details: A virus (we'll call it Human Nasty Virus 1 (HNV-1)) can infect T cells (a type of white blood cell in the immune system) by binding to a certain receptor on its surface, which we'll call the Nasty Virus Receptor (NVR). Scientists have found that HNV-1 absolutely needs a certain ...


2

A chromosome is simply a length or segment of DNA. Bacteria have few structural proteins on their DNA, and they have one circular chromosome. In humans, before DNA replication, the nucleus contains 46 strands of DNA, i.e. chromosomes (22 chromosomes in two copies and usually two X or one X and one Y for males and females, respectively). All chromosomes are ...


1

It is right that RNA has small areas of complementary base pairing. You asked whether these parts are double helical. DNA has various types of double-helical conformations. Most popular among them is the B-form, A-form and Z-form. The Watson Crick model is similar to the B-form of DNA. It is right-handed double-helical structure. A-form and Z-form are ...


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It's not the size that counts, it's how you pack it (sorry couldn't help myself). Wild-type bidensoviruses do a lot of interesting things to pack genome like splitting its genome into two virions(1), inverted terminal repeats (ITRs) that form panhandles that can stack instead of hairpins (2), and overlapping positive and negative ssDNA strand ends (2 and 3) ...



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