GATE Life Sciences 2021
Text of page 1
GATE 2021 Answer Key for Life Sciences (XL)
Graduate Aptitude Test in Engineering (GATE 2021)
Paper / Section: Life Sciences (XL) / Chem istry (XL-P)
Question Type Section Answer Negative
Q. No. Session Marks
MCQ/MSQ/NAT Name
e Key/Range Marks
1 6 MCQ GA A 1 1/3
2 6 MCQ GA B 1 1/3
3 MCQ GA B
6 1 1/3
4 6 MCQ GA B 1 1/3
5 6 MCQ GA C 1 1/3
6 6 MCQ GA C 2 2/3
7 6 MCQ GA A 2 2/3
8 6 MCQ GA C 2 2/3
L ว
10 6 MCQ GA C 2 2/3
1 6 MCQ XL-P C 1 1/3
2 6 MCQ XL-P A 1 1/3
3 6 NAT XL-P 6 to 6 1 0
-0.86 to
4 NAT 1
-
6 XL-P
0.84
5 6 NAT XL-P 5 to 5 1 0
6 6 MCQ XL-P B 2 2/3
7 6 MCQ XL-P 2 2/3
8 6 MCQ XL-P C 2 2/3
9 6 MCQ XL-P B 2 2/3
10 6 MSQ XL-P B; D 2 0
Text of page 2
GATE 2021 Answer Key for Life Sciences (XL)
Question Type Section Answer Negative
Q. No. Session Marks
MCQ/MSQ/NAT Name
e Key/Range Marks
11 6 MSQ XL-P C; D 2 0
321.0 to
12 6 NAT XL-P 2 0
321.2
13 6 NAT XL-P 3 to 3 2 0
14 6 NAT XL-P 3.00 to 3.02 2 0
15 6 NAT XL-P 125 to 125 2 0
Text of page 3
GATE 2021 Answer Key for Life Sciences (XL)
Graduate Aptitude Test in Engineering (GATE 2021)
Paper / Section: Life Sciences (XL) / Bioch emistry (XL-Q)
Question Type Sectio n Answer
Marks
Negative
Q. No. Session
MCQ/MSQ/NAT Name
e Key/Range Marks
1 6 MCQ XL-Q C 1 1/3
2 6 MCQ XL-Q D 1 1/3
3 6 MCQ XL-Q D 1 1/3
4 6 MCQ XL-Q C 1 1/3
5 6 MCQ XL-Q D 1 1/3
6 6 MCQ XL-Q MTA 1 1/3
7 6 MCQ XL-Q D 1 1/3
8 6 MCQ XL-Q B 1 1/3
9 6 MCQ XL-Q D 1 1/3
10 6 MCQ XL-Q B 1 1/3
11 6 MCQ XL-Q D 2 2/3
12 6 MCQ XL-Q B 2 2/3
13 6 MSQ XL-Q A; D 2 0
14 6 MSQ XL-Q B; D 2 0
15 6 MSQ XL-Q A; B; D 2 0
16 6 MSQ XL-Q A; C 2 0
17 L
MISQ XL-Q 7
18 6 MSQ XL-Q B; C 2 0
19 6 MSQ XL-Q C 2 이
20 6 MSQ XL-Q B; D 2 0
MTA means Mar ks to All
Text of page 4
GATE 2021 Answer Key for Life Sciences (XL)
Graduate Aptitude Test in Engineering (GATE 2021)
Paper / Section: Life Sciences (XL) / Botan y (XL-R)
Question Type Section Answer Negative
Q. No. Session Marks
MCQ/MSQ/NAT Name
e Key/Range Marks
1 6 MCQ XL-R A 1 1/3
2 6 MCQ XL-R 1 1/3
3 6 MCQ XL-R A 1 1/3
4 6 MCQ XL-R B 1 1/3
5 6 MCQ XL-R C 1 1/3
6 6 MCQ XL-R A 1 1/3
7 6 MCQ XL-R A 1 1/3
8 6 MSQ XL-R C; D 1 이
9 6 MSO XI-R A: B 1 0
137.4 to
137.6
10 6 NAT XL-R OR 1
-137.6 to
-137.4
11 6 MCQ XL-R B 2 2/3
12 6 MCQ XL-R A 2 2/3
13 6 MCQ XL-R C 2 2/3
14 6 MCQ XL-R B 2 2/3
15 6 MCQ XL-R A 2 2/3
16 6 MSQ XL-R A; B; C 2 0
17 6 MSQ XL-R B; D 2 0
18 6 MSQ XL-R B; C 2 0
19 6 NAT XL-R 0.25 to 0.25 2 0
Text of page 5
GATE 2021 Answer Key for Life Sciences (XL)
Question Type Section Answer Negative
Q. No. Session Marks
MCQ/MSQ/NAT Name
e Key/Range Marks
20 6 NAT XL-R 25 to 25 2 0
Text of page 6
GATE 2021 Answer Key for Life Sciences (XL)
Graduate Aptitude Test in Engineering (GATE 2021)
Paper / Section: Life Sciences (XL) / Microlbiology (XL-S)
Question Type Sectio n Answer Negative
Q. No. Session Marks
MCQ/MSQ/NAT Namee Key/Range Marks
1 6 MCQ XL-S C 1 1/3
2 6 MCQ XL-S C 1 1/3
3 6 MCQ XL-S D 1 1/3
4 6 MCQ XL-S C 1 1/3
5 6 MCQ XL-S D 1 1/3
6 6 MSQ XL-S A; B 1 0
7 6 MSQ XL-S B; D 1 0
8 6 MSQ XL-S A; B 1 이
9 6 MSQ XL-S A; C 1 0
10 6 NAT XL-S 5 to 5 1 0
11 6 MCQ XL-S D 2 2/3
12 6 MCQ XL-S B 2 2/3
13 6 MCQ XL-S C 2 2/3
14 6 MCQ XL-S A 2 2/3
15 6 MCQ XL-S C 2 2/3
16 6 MCQ XL-S В 2 2/3
1024 to
17 6 NAT XL-S 2 0
1024
18 6 NAT XL-S 5 to 5 2 이
19 6 NAT XL-S 24 to 24 2 0
6.20 to
20 6 NAT XL-S 2 0
6.30
Text of page 7
GATE 2021 Answer Key for Life Sciences (XL)
Graduate Aptitude Test in Engineering (GA TE 2021)
Paper / Section: Life Sciences (XL) /Zoolo gy (XL-T)
Question Type Section Answer Negative
Q. No. Session Marks
MCQ/MSQ/NAT Name
e Key/Range Marks
1 6 MCQ XL-T C 1 1/3
2 6 MCQ XL-T B 1 1/3
3 6 MCQ XL-T D 1 1/3
4 6 MCQ XL-T C 1 1/3
5 6 MCQ XL-T B 1 1/3
6 6 MCQ XL-T A 1 1/3
7 6 MCQ XL-T D 1 1/3
8 6 NAT XL-T 3 to 3 1 0
9 6 NAT XL-T 0.48 to 0.48 1 0
10 6 NAT XL-T 10 to 10 1 0
11 6 MCQ XL-T A 2 2/3
12 6 MCQ XL-T B 2 2/3
13 6 MCQ XL-T C 2 2/3
14 6 MCQ XL-T A 2 2/3
15 6 MCQ XL-T D 2 2/3
16 6 MCQ XL-T P 2 2/3
17 6 MSQ XL-T A; D 2 이
18 6 MSQ XL-T B; D 2 0
19 6 NAT XL-T 4 to 4 2 0
20 6 NAT XL-T 50 to 50 2 0
Text of page 8
GATE 2021 Answer Key for Life Sciences (XL)
Graduate Aptitude Test in Engineering (GATE 2021)
Paper / Section: Life Sciences (XL) / Food Technology (XL-U)
Question Type Sectio n Answer Negative
Q. No. Session Marks
MCQ/MSQ/NAT Name
e Key/Range Marks
1 6 MCQ XL-U B 1 1/3
2 6 MCQ XL-U D 1 1/3
3 6 MCQ XL-U A 1 1/3
4 6 MCQ XL-U B 1 1/3
5 6 MCQ XL-U B 1 1/3
6 6 MCQ XL-U A 1 1/3
7 6 MCQ XL-U D 1 1/3
T-
8 6 MCO Ω 1 1/3
9 6 MCQ XL-U D 1 1/3
10 6 MCQ XL-U A 1 1/3
11 6 MCQ XL-U A 2 2/3
12 6 MCQ XL-U B 2 2/3
13 6 MCQ XL-U B 2 2/3
14 6 MSQ XL-U A; D 2 0
15 6 MSQ XL-U A; B 2 0
16 6 MSQ XL-U A; C 2 0
17 6 MSQ XL-U A; B; D 2
18 6 MSQ XL-U A; B 2 0
19 6 MSQ XL-U A; C 2 0
0.135 to
20 6 NAT XL-U 2 0
0.150Page 1 of 67
Source: GATE. Question paper published by GATE.