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GATE BT-2017 Answer Key | Solutions Discussion - foodemployment - 03-19-2015

GATE BT 2017 Solutions,  Answers, Discussion and Answer keys  shared here....

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GATE BT-2017 Answer Key | Solutions Discussion - RONIT SHARMA - 02-05-2017

Hello friends, if anyone finds answer key to GATE-2017 BT (held today) please post link here, and lets do some discussion on the exam


RE: GATE BT-2017 Answer Key | Solutions Discussion - SunilNagpal - 02-05-2017

(02-05-2017, 09:05 PM)RONIT SHARMA Wrote: Hello friends, if anyone finds answer key to GATE-2017 BT (held today) please post link here, and lets do some discussion on the exam

Can you post the questions here? Discussion over each question would be quite productive.


Gram -ve Gram +ve | GATE BT-2017 Answer Key | Solutions Discussion - RONIT SHARMA - 02-05-2017

Assertion: Gram -ve bacteria stained by saffranin
Reason: Gram -ve bacteria has LPS.


RE: GATE BT-2017 Answer Key | Solutions Discussion - RONIT SHARMA - 02-05-2017

I guess answer is "B" both are correct but its not proper reason.


RE: GATE BT-2017 Answer Key | Solutions Discussion - RONIT SHARMA - 02-05-2017

Q. Find the angle between two vectors: i-j+2k and 2i-j-k
Ans: 80.4


RE: GATE BT-2017 Answer Key | Solutions Discussion - RONIT SHARMA - 02-05-2017

Q: Which amino acid has three ionizable sites?
A. Glycine
B. Leucine
C. Valine
D. Lysine

Ans: Lysine (I guess)


RE: GATE BT-2017 Solutions Discussion | Gram -ve +ve Question - SunilNagpal - 02-05-2017

(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.


RE: GATE BT-2017 Answer Key | Solutions Discussion - RONIT SHARMA - 02-05-2017

Question was assertion and reasoning
Assertions: Gram -ve bacteria stained by saffranin
Reason: Gram -ve bacteria has LPS.


RE: GATE BT-2017 Answer Key | Solutions Discussion - SunilNagpal - 02-05-2017

(02-05-2017, 09:55 PM)RONIT SHARMA Wrote: Q: Which amino acid has three ionizable sites?
A. Glycine
B. Leucine
C. Valine
D. Lysine

Ans: Lysine (I guess)


Following is a list of pKa values for the a-carboxylic acid group, the a-amino group, and any ionizable side chains (the ionizable groups in the same order).


Alanine
2.35
9.87

Arginine
2.01
9.04
12.48


Asparagine
2.02
8.80

Aspartic Acid
2.10
9.82
3.86


Cysteine
2.05
10.25
8.00


Glutamic Acid
2.10
9.47
4.07


Glutamine
2.17
9.13

Glycine
2.35
9.78

Histidine
1.77
9.18
6.10


Isoleucine
2.32
9.76

Leucine
2.33
9.74

Lysine

2.18
8.95
10.53


Methionine
2.28
9.21

Phenylalanine
2.58
9.24

Proline
2.00
10.60

Serine
2.21
9.15

Threonine
2.09
9.10

Tryptophan
2.38
9.39

Tyrosine
2.20
9.11
10.07


Valine
2.29
9.72

Lysine is the correct one.