The production of gametes by the parents, formation of zygotes, the F1 and F2 plants, can be understood from a diagram called:

NEET-2021 Principles-of-Inheritance-and-Variation [class-xii ]

• Bullet square
• Punch square
• Punnett square
• Net square
Correct Option: C  [ Punnett square ]

Remark:

Complete the flow chart on central dogma.

NEET-2021 Molecular-Basis-of-Inheritance [class-xii ]

• (A)-Replication; (B)-Transcription; (C)-Transduction; (D)-Protein
• (A)-Translation; (B)-Replication; (C)-Transcription; (D)-Transduction
• (A)-Replication; (B)-Transcription; (C)-Translation; (D)-Protein
• (A)-Transduction; (B)-Translation; (C)-Replication; (D)-Protein
Correct Option: C  [ (A)-Replication; (B)-Transcription; (C)-Translation; (D)-Protein ]

Remark:

The factor that leads to Founder effect in a population is:

NEET-2021 Evolution [class-xii ]

• Natural selection
• Genetic recombination
• Mutation
• Genetic drift
Correct Option: D  [ Genetic drift ]

Remark:

Mutations in plant cells can be induced by:

NEET-2021 Strategies-for-Enhancement-in-Food-Production [class-xii ]

• Kinetin
• Infrared rays
• Gamma rays
• Zeatin
Correct Option: C  [ Gamma rays ]

Remark:

Match List-I with List-II.

NEET-2021 Strategies-for-Enhancement-in-Food-Production [class-xii ]

• A-II, B-I, C-IV, D-III
• A-III, B-IV, C-I, D-II
• A-IV, B-III, C-II, D-I
• A-III, B-IV, C-II, D-I
Correct Option: A  [ A-II, B-I, C-IV, D-III ]

Remark:

During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out:

NEET-2021 Biotechnology-Principles-and-Processes [class-xii ]

• RNA
• DNA
• Histones
• Polysaccharides
Correct Option: B  [ DNA ]

Remark:

DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as:

NEET-2021 Biotechnology-Principles-and-Processes [class-xii ]

• Yellow bands
• Bright orange bands
• Dark red bands
• Bright blue bands
Correct Option: B  [ Bright orange bands ]

Remark:

When gene targetting involving gene amplification is attempted in an individual's tissue to treat disease, it is known as:

NEET-2021 Biotechnology-and-its-applications [class-xii ]

• Biopiracy
• Gene therapy
• Molecular diagnosis
• Safety testing
Correct Option: B  [ Gene therapy ]

Remark:

Which of the following is not an application of PCR (Polymerase Chain Reaction)?

NEET-2021 Biotechnology-and-its-applications [class-xii ]

• Molecular diagnosis
• Gene amplification
• Purification of isolated protein
• Detection of gene mutation
Correct Option: C  [ Purification of isolated protein ]

Remark:

Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?

NEET-2021 Biotechnology-and-its-applications [class-xii ]

• Denaturation, Annealing, Extension
• Denaturation, Extension, Annealing
• Extension, Denaturation, Annealing
• Annealing, Denaturation, Extension
Correct Option: A  [ Denaturation, Annealing, Extension ]

Remark: