Question

day 1: download or print the pdf for this lesson, and follow along in the \dna extraction lab\ as instructed. after completing the lab and the \apply and extend\ questions on the first day, answer the level 1 practice questions. which photo looks most like the extracted dna?

Explanation:

DNA is a double - helix structure. Among the three photos, photo 2 shows a double - helix structure which is characteristic of DNA. Photo 1 shows a pipetting action (likely part of the DNA extraction process but not the DNA itself), and photo 3 shows a test - tube handling action (also part of the lab process but not the DNA structure).

Answer:

2