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## GATE Biotechnology Question Paper 2019 with Answer Key

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SAMPLE QUESTIONS

Q.1. Some students were not involved in the strike.

If the above statement is true, which of the following conclusions is/are logically necessary?

1. Some who were involved in the strike were students.
2. No student was involved in the strike.
3. At least one student was involved in the strike.
4. Some who were not involved in the strike were students.

(A) 1 and 2

(B) 3

(C) 4

(D) 2 and 3

Q.2. Five numbers 10, 7, 5, 4 and 2 arc to be arranged in a sequence from left to right following the directions given below:

1. No two odd or even numbers are next to each other.

2. The second number from the left is exactly half of the left-most number.

3. The middle number is exactly twice the right-most number.

Which is the second number from the right?

(A) 2

(B) 4

(C) 7

(D) 10

Q.3. The radius as well as the height of a circular cone increases by 10%. The percentage increase in its volume is _______.

(A) 17.1

(B) 21.0

(C) 33.1

(D) 72.8

Q.4. Which one of the following is used as a pH indicator in animal cell culture medium’?

(A) Acridine orange

(B) Phenol red

(C) Bromophenol blue

(D) Coomassie blue

Q.5. Tetracycline inhibits the

(A) interaction between tRNA and mRNA

(B) translocation of mRNA through ribosome

(C) peptidyl transferase activity

(D) binding of amino-acyl tRNA to ribosome