Question

strands in a single molecule for DNA & RNA?

Answer 1

This might sound very trivial but what defines a molecule of DNA in cells? I'd think a chromosome is a molecule of DNA because sister chromatids are connected to one another at the centromere/with centromeric sequence so they're still a single molecule?! Telomeric sequence is at the ends of the chromosome so even if the DNA is a double helix and has hydrogen bonding between bases, the ends are attached to a telomere "cap", so it still seems to be a single molecule. If a chromosome is a molecule of DNA, so would that mean there are 46 DNA molecules in a homo sapien cell?! Maybe I'm not thinking about the structure going from DNA bases to a full chromosome right, but any clarification as to what a molecule of DNA in a cell would be very helpful!

Thanks!

mark me brainliest plßs

Answer 2

In addition, because they are copied from only a limited region of the DNA, RNA molecules are much shorter than DNA molecules. A DNA molecule in ahuman chromosome can be up to 250 million nucleotide-pairs long; in contrast, most RNAs are no more than a few thousand nucleotides long, and many are considerably shorter



A DNA molecule consisting of only a single strand contrary to the typical two strands of nucleotides in helical form. Supplement. In nature, single stranded DNA genome can be found in Parvoviridae (class II viruses). Single stranded DNA can also be produced artificially by rapidly cooling a heat-denatured DNA.


Unlike double-stranded DNA, RNA is a single-stranded molecule in many of its biological roles and consists of a much shorter chain of nucleotides. However, RNA can, by complementary base pairing, form intrastrand (i.e., single-strand) double helixes, as in tRNA