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Assertion & Reason Test: Biotechnology: Principles & Processes - NEET MCQ


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10 Questions MCQ Test - Assertion & Reason Test: Biotechnology: Principles & Processes

Assertion & Reason Test: Biotechnology: Principles & Processes for NEET 2024 is part of NEET preparation. The Assertion & Reason Test: Biotechnology: Principles & Processes questions and answers have been prepared according to the NEET exam syllabus.The Assertion & Reason Test: Biotechnology: Principles & Processes MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion & Reason Test: Biotechnology: Principles & Processes below.
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Assertion & Reason Test: Biotechnology: Principles & Processes - Question 1
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : β-galactosidase coding sequence acts as a selectable marker.

Reason (R) : Enzyme galactosidase converts the galactose into lactose.

Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 1

Assertion (A) states that the β-galactosidase coding sequence acts as a selectable marker. A selectable marker is a gene that confers a phenotype that can be easily selected for or against, such as antibiotic resistance or a visible color change.

Reason (R) states that the enzyme galactosidase converts the galactose into lactose. Galactosidase is an enzyme that catalyzes the hydrolysis of the sugar galactose, which is often used as a substrate in molecular biology experiments.

Since β-galactosidase is a enzyme that catalyzes the hydrolysis of the sugar galactose which is used as a substrate in molecular biology experiments and this enzyme can be used as a selectable marker, both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). Therefore, the correct choice is 1.

Assertion & Reason Test: Biotechnology: Principles & Processes - Question 2
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : DNA is a positively charged molecule.

Reason (R) : DNA moves towards the positive electrode (anode).

Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 2
DNA is a negatively charged molecule, hence it moves towards the positive electrode (anode).
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Assertion & Reason Test: Biotechnology: Principles & Processes - Question 3
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Thermus aquaticus, is used in PCR technique.

Reason (R) : It is a heat-stable DNA polymerase.

Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 3
Thermus aquaticus is the source of DNA polymerase because it is a heat-stable DNA polymerase.
Assertion & Reason Test: Biotechnology: Principles & Processes - Question 4
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : E. coli having pBR322 with DNA insert at BamHI site cannot grow in medium containing tetracycline.

Reason(R) : Recognition site for BamH I is present in TetR region of pBR322.
Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 4
pBR322 carries recognition sites for a number of commonly used restriction enzymes. Recognition site for BamHl is present in the tetr region i.e., the region responsible for tetracycline resistance. When an insert is added at the BamHl recognition site the gene for tetracycline resistance becomes non-functional and the recombinant bacteria with plasmid pBR322 that has DNA inserted at BamHl lose tetracycline resistance.
Assertion & Reason Test: Biotechnology: Principles & Processes - Question 5
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Any fragment of DNA, when linked to the ori region, can be initiated to replicate.

Reason (R) : Ori is a genetic sequence that acts as the initiation site for replication of DNA.
Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 5
The process of DNA replication begins at the ori sequence. The presence of ori in a DNA fragment makes it a self-replicating molecule.The process of DNA replication begins at the ori sequence. The presence of ori in a DNA fragment makes it a self-replicating molecule.
Assertion & Reason Test: Biotechnology: Principles & Processes - Question 6
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : EcoRI is a restriction endonuclease enzyme.

Reason (R) : Exonuclease removes nucleotides from the ends of DNA.
Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 6
EcoRI is a restriction endonuclease enzyme. Exonuclease removes nucleotides from the ends of DNA.
Assertion & Reason Test: Biotechnology: Principles & Processes - Question 7
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Restriction enzymes belong to class nucleases.

Reason (R) : Nucleases are of two kinds : exo and endonucleases. Exonucleases remove nucleotides within the DNA.
Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 7
Nucleases are of two kinds : exo and endonucleases, but exonucleases remove nucleotides from the ends of the DNA.
Assertion & Reason Test: Biotechnology: Principles & Processes - Question 8
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : It is essential to have few cloning sites in the cloning vector.

Reason(R) : It helps in identifying and eliminating non-transformants and selectively permitting the growth of the transformants.
Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 8
It is essential to have few cloning sites in the cloning vector. It is because, in order to link the alien DNA, the vector needs to have very few recognition sites for the commonly used restriction enzymes. Presence of more than one recognition sites within the vector will generate several fragments, which will complicate the gene cloning. Also, the vector requires a selectable marker, which helps in identifying and eliminating non-transformants and selectively permitting the growth of the transformants.
Assertion & Reason Test: Biotechnology: Principles & Processes - Question 9
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Agarose gel electrophoresis is used to check the progression of a restriction enzyme digestion.

Reason (R) : Restriction enzyme digestions are performed by incubating purified DNA molecules with restriction enzymes.
Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 9
In Agarose gel electrophoresis, DNAs fragments cut by restriction enzymes can be arranged according to their sizes.
Assertion & Reason Test: Biotechnology: Principles & Processes - Question 10
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : A primer is a small segment of DNA that binds to a complementary strand of DNA.

Reason(R) : Primers are necessary to stop the functioning of DNA polymerase enzymes and, therefore, are necessary in polymerase chain reaction.
Detailed Solution for Assertion & Reason Test: Biotechnology: Principles & Processes - Question 10

A primer is a small segment of DNA that binds to a complementary strand of DNA. Primers are necessary to start the functioning of DNA polymerase enzymes and, therefore, are necessary in polymerase chain reactions.

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