Question

Would the DNA model provided most likely be representative of a bacteria, human, or fungus?

A)
This DNA would only be found in a human or fungus because bacteria do not have DNA.

B)
This DNA would not be found in fungus, because fungus DNA is not made
of nucleotides.

C) All DNA has the same structure, so the modeled DNA could be found in any
living organism

D)
This DNA would not be found in bacteria because bacteria only contain the
nitrogen bases adenine, cytosine, and guanine.

Answer 1

The modeled DNA could belong to any living organism, including a bacterium, human, or fungus because DNA in all living organisms has the same basic double-helix structure composed of nucleotide base pairs. So the correct answer is option C - All DNA has the same structure, so the modeled DNA could be found in any living organism.

Step-by-step explanation:

The correct answer to the question about whether the provided DNA model would be representative of a bacterium, human, or fungus is option C: All DNA has the same structure, so the modeled DNA could be found in any living organism. DNA in all living organisms is a polymer of nucleotides, which are composed of a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group. The four nitrogenous bases in DNA are adenine, guanine, cytosine, and thymine. Adenine always bonds with thymine, and cytosine always bonds with guanine, forming base pairs in a double-helix structure. While the overall structure of DNA is similar across all living organisms, the arrangement of DNA differs, with bacteria containing a single, circular chromosome and eukaryotes like humans and fungi having multiple, linear chromosomes.

In comparison, RNA nucleotides are different in that they contain the base uracil instead of thymine and form a single-stranded molecule. Thus, the presence of DNA in an organism is not dependent on whether the organism is a bacterium, a human, or a fungus. Given the general properties of DNA, the question itself may contain some misconceptions, as all bacteria, humans, and fungi possess DNA made of the same basic components, albeit structured differently within their respective cells.