Question

1.1.4 quiz: chromosomes and dna
which part of the model would best represent a chromosome?
a. a specific section of the hose
b. the reel holding the coiled - up hose
c. the entire hose and reel system
d. the entire length of hose

Explanation:

To determine which part represents a chromosome, we relate the model to DNA - chromosome structure. DNA is long and coiled, and chromosomes are structures that package DNA. The reel holding the coiled - up hose is like a chromosome because chromosomes are the structures that hold the coiled (condensed) DNA (similar to the hose coiled on the reel). A specific section of the hose (A) would be like a gene (a segment of DNA), the entire hose and reel system (C) is more like the cell's genetic material as a whole, and the entire length of the hose (D) is like the uncondensed DNA strand. So the reel holding the coiled - up hose (B) best represents a chromosome.

Answer:

B. The reel holding the coiled - up hose