sorry guys, i have been posting a lot of questions lately. Definitely wanted to clarify some things on the bio section for aamc 11. There were some convoluted ones in this section so please help out if you can:
110. Which of the following best describes the bond that would form between the following two nucleotides if they were located adjacent to each other as shown in a single strange of DNA?
D. A bond between the phophateof the adenine and the sugar of the thymine.
Solution: The question shows two adjacent nucleotides and asks the examinee to predict the most likely bond that would form between them. As oriented, the most likely would be between the phosphate of the bottom nucleotide (adenine) and the sugar of the top nucleotide (thymine). This is the familar bonding pattern that makes up the backbone of the DNA, alternation sugar and phosphate groups joined by the ester bonds.
How did they know it was adenine to thymine? Just based off their general locations? Since adenine was on bottom it is more like the bind its phophate group to the sugar on the thymine?
135. Based on the passage, is CatL expression sufficient for the VSV-EGP infection of the mouse cell lines presented in figure 1?
C. No, because VSV-EGP does not infect the CatB -/- cells expression CatL better than it infects the CatB -/- cells not expressing CatlL.
136. Based on the passage, does optimal VSV-EGP infection in vitro require CatB, CatL, or both? Optimal infection:
C. Requires both CatB and CatL
--I got 135 correct and 136 wrong. I feel like these answers contradict themselves? If CatL with CatB in 135 is not as expressive as CatB alone how does optimal infection require both?
110. Which of the following best describes the bond that would form between the following two nucleotides if they were located adjacent to each other as shown in a single strange of DNA?
D. A bond between the phophateof the adenine and the sugar of the thymine.
Solution: The question shows two adjacent nucleotides and asks the examinee to predict the most likely bond that would form between them. As oriented, the most likely would be between the phosphate of the bottom nucleotide (adenine) and the sugar of the top nucleotide (thymine). This is the familar bonding pattern that makes up the backbone of the DNA, alternation sugar and phosphate groups joined by the ester bonds.
How did they know it was adenine to thymine? Just based off their general locations? Since adenine was on bottom it is more like the bind its phophate group to the sugar on the thymine?
135. Based on the passage, is CatL expression sufficient for the VSV-EGP infection of the mouse cell lines presented in figure 1?
C. No, because VSV-EGP does not infect the CatB -/- cells expression CatL better than it infects the CatB -/- cells not expressing CatlL.
136. Based on the passage, does optimal VSV-EGP infection in vitro require CatB, CatL, or both? Optimal infection:
C. Requires both CatB and CatL
--I got 135 correct and 136 wrong. I feel like these answers contradict themselves? If CatL with CatB in 135 is not as expressive as CatB alone how does optimal infection require both?