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

#GATE Biotechnology 2017
#GATE Biotechnology Solutions
#GATE Biotechnology Answer key
#GATE BT
#GATE Biotech

[RONIT SHARMA]

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

[SunilNagpal]

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.

[RONIT SHARMA]

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

[RONIT SHARMA]

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

[RONIT SHARMA]

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

[RONIT SHARMA]

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

Ans: Lysine (I guess)

[SunilNagpal]

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.

[RONIT SHARMA]

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

[SunilNagpal]

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.