need help with the last question. why the genetic structure might have led to th

Question

need help with the last question. why the genetic structure might have led to the extinction?

Problem #2 (50 points). Using a MinION shipped on the Mars 2020 mission, you are thrilled to discover life existed at one time on Mars! Upon careful analysis of some Martian DNA, you realize that an unusual third nucleotide pair W-Z exists in addition to the standard A-T and G-C pairs. You manage to extract a 30-nucleotide stretch of a single Martian DNA strand and determine its nucleotide sequence, after originally not knowing it at all. Most of the time, you find that w pairs with Z, A pairs with T, and G pairs with C. However, you do find that 20.0% of the time a Z nucleotide can pair with a T nucleotide. The nucleotide sequence that you were able to analyze is given below. How much information content exists in this sequence? Explain your logic and show your calculations. Following question #1 above, give a plausible H-bonding designation for the base-pairing surfaces of the w and Z nucleobases. Lastly provide one reason why the Martian genetic structure might have led to the extinction of all Martian life 5'-CATZGWACATCATWCWZZGATTZWWATWAG-3

Explanation / Answer

A base pair with T,

G base pair with C,

W base pair with Z.

If this is the case then the chance of species getting extinct is very limited. It is because during semi-conservative replication, the DNA sequence is not changed. It is maintained as such due to base specificity.

---------------------------------------------------------------------------------------------------------------------

But when Z base pair with T (other than W), this in turn will affect DNA sequence.

For example, in a template strand if there is sequence such as ZZAAG, then the resulting new strand may have TTTTC or WWTTC or TWTTC or WTTTC.

Here in this scenario, DNA sequence of the new strand is changed. This in turn will affect the amino acid sequence/ protein binding domain,etc. which leads to the loss of homeostasis and ultimately extinction.

--------------------------------------------------------------------------------------------------------------------------------------

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.