DNA & Genes

Question 1

A short DNA fragment is written 5'-A A C G T A A-3'. How many guanine (G) bases are present on the strand that pairs with this fragment?

Accepted Answer

1

Answer

0

Answer

2

Answer

3

Question 2

Which statement correctly explains what CRISPR does and names two important ethical concerns about using it in humans?

Accepted Answer

CRISPR acts like molecular scissors that cut DNA at a chosen spot so scientists can add, remove, or change genes; the ethical worries include making heritable changes in embryos and the possibility of designing humans for non‑medical traits.

Answer

CRISPR is a protein that copies DNA without cutting it; the main ethical worry is that the treatment might be too expensive for most patients.

Answer

CRISPR can replace a faulty gene with a correct one, but it cannot be used on embryos; the ethical debate focuses only on whether it should be used for cosmetic changes.

Answer

CRISPR edits DNA by binding to RNA and does not cut the strand; its ethical issues are limited to patents and commercial profit.

Question 3

Which statement accurately explains what the CRISPR‑Cas9 system does and lists two separate ethical issues that must be considered when it is used in humans?

Accepted Answer

CRISPR‑Cas9 works as molecular scissors that cut a targeted DNA segment so the sequence can be altered; two major ethical concerns are permanent germline changes passed to future generations and the possibility of creating genetically "designer" babies.

Answer

CRISPR‑Cas9 copies a gene directly into a protein, so no DNA alteration is needed; the only ethical worry is the high price of the technology.

Answer

CRISPR‑Cas9 can cut DNA at a chosen spot and replace it, but the main ethical worry is that it might cause infections in patients.

Answer

CRISPR‑Cas9 edits DNA by adding extra whole chromosomes; ethical concerns are that it could make better athletes and that it might be used to modify crops.

Try three questions

A short DNA fragment is written 5'-A A C G T A A-3'. How many guanine (G) bases are present on the strand that pairs with this fragment?

Which statement correctly explains what CRISPR does and names two important ethical concerns about using it in humans?

Which statement accurately explains what the CRISPR‑Cas9 system does and lists two separate ethical issues that must be considered when it is used in humans?

Keep going on this shelf