Biotechnology: Principles and Processes · Question 9

Polymerase chain reaction (PCR) amplifies DNA following the equation.

1. 2n+1
2. 2 N2
3. N2
4. 2n

Identify the part of a bio-reactor which is used as a foam breaker from the given figure. [figure]

1. D
2. C
3. A
4. B

The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in the presence of a chromogenic substrate. Given below are two statements about this method: In the light of the above statements, choose the most appropriate answer from the options given below:

1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect

Which of the following enzyme(s) are NOT essential for gene cloning? Choose the correct answer from the options given below:

1. D and E only
2. B and C only
3. C and D only
4. A and B only

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below :

1. Statement I is correct but statement II is incorrect
2. Statement I is incorrect but statement II is correct
3. Both statement I and statement II are correct
4. Both statement I and statement II are incorrect

Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of:

1. 8 bp
2. 6 bp
3. 4 bp
4. 10 bp

What is the fate of a piece of DNA carrying only gene of interest which is transferred into an alien organism? Choose the correct answer from the options given below:

1. A and B only
2. D and E only
3. B and C only
4. A and E only

The "Ti plasmid" of Agrobacterium tumefaciens stands for

1. Tumour inhibiting plasmid
2. Tumor independent plasmid
3. Tumor inducing plasmid
4. Temperature independent plasmid

Which of the following statements is incorrect?

1. A bio-reactor provides optimal growth conditions for achieving the desired product
2. Most commonly used bio-reactors are of stirring type
3. Bio-reactors are used to produce small scale bacterial cultures
4. Bio-reactors have an agitator system, an oxygen delivery system and foam control system

The following diagram shows restriction sites in E. coli cloning vector pBR322. Find the role of 'X' and 'Y' genes : [figure]

1. The gene 'X' is responsible for resistance to antibiotics and 'Y' for protein involved in the replication of Plasmid.
2. The gene 'X' is responsible for controlling the copy number of the linked DNA and 'Y' for protein involved in the replication of Plasmid.
3. The gene 'X' is for protein involved in replication of Plasmid and 'Y' for resistance to antibiotics.
4. Gene 'X' is responsible for recognition sites and 'Y' is responsible for antibiotic resistance.