Video Transcript
Which of the following correctly
links genes and DNA? (A) One molecule of DNA,
chromosome, contains many genes. (B) One gene contains many
different DNA molecules, chromosomes.
Our genetic material, DNA, is found
in the nucleus of most of our cells. In fact, if you were to remove the
DNA from a single cell and stretch it out, it would be about two meters in
length. This DNA is not one long continuous
molecule. Instead, it’s organized into 46
structures called chromosomes.
Let’s look at one of these
chromosomes in more detail. Each chromosome is a compacted form
of DNA that’s wrapped up tightly around special proteins called histones. On this DNA molecule, there can be
many different genes. These genes provide the
instructions for different proteins, for example, insulin that regulates blood sugar
levels.
Therefore, the correct answer
choice is (A). One molecule of DNA, chromosome,
contains many genes.
