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GATE BT-2017 Answer Key | Solutions Discussion
#5
I guess answer is "B" both are correct but its not proper reason.
#6
Q. Find the angle between two vectors: i-j+2k and 2i-j-k
Ans: 80.4
#7
Q: Which amino acid has three ionizable sites?
A. Glycine
B. Leucine
C. Valine
D. Lysine

Ans: Lysine (I guess)
#8
(02-05-2017, 09:45 PM)RONIT SHARMA Wrote: A: Gram -ve bacteria stained by saffranin
R: Gram -ve bacteria has LPS.

I am assuming that the question was regarding 'which of the two is more correct?'. On that ground, It should be B (Gram -ve bacteria have LPS) as it is due this factor that Saffranin can actually stain Gram -ve bacteria (Saffranin being a basic dye attaches well to the highly negative LPS).

How LPS is negatively charged? BCoz it is phosphorylated and it's the P group that confers the negative charge to LPS.

Edit:
Since it was Assertion and Reasoning, in my opinion, reason is correct.
Sunil Nagpal
MS(Research) Scholar, IIT Delhi (Alumnus)
Advisor for the Biotech Students portal (BiotechStudents.com)
Computational Researcher in BioSciences at a leading MNC


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