Inbreeding depression is:

NEET-(Oct)2020 [Strategies-for-Enhancement-in-Food-Production] [class-xii ]

• Reduced motility and immunity due to close inbreeding
• Decreased productivity due to mating of superior male and inferior female
• Decrease in body mass of progeny due to continued close inbreeding
• Reduced fertility and productivity due to continued close inbreeding
Correct Option: D  [ Reduced fertility and productivity due to continued close inbreeding ]

Remark:

Cyclosporin A, used as immuno suppression agent, is produced from:

NEET-(Oct)2020 [Microbes-in-Human-Welfare] [class-xii ]

• Monascus purpureus
• Saccharomyces cerevisiae
• Penicillium notatum
• Trichoderma polysporum
Correct Option: D  [ Trichoderma polysporum ]

Remark:

Match the following columns and select the correct option:

NEET-(Oct)2020 [Microbes-in-Human-Welfare] [class-xii ]

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

Remark:

Match the following techniques or instruments with their usage:

NEET-(Oct)2020 [Biotechnology-Principles-and-Processes] [class-xii ]

• (A)-(III), (b)-(II), (c)-(IV), (d)-(I)
• (A)-(II), (b)-(I), (c)-(IV), (d)-(III)
• (A)-(IV), (b)-(III), (c)-(II), (d)-(I)
• (A)-(II), (b)-(I), (c)-(III), (d)-(IV)
Correct Option: B  [ (A)-(II), (b)-(I), (c)-(IV), (d)-(III) ]

Remark:

First discovered restriction endonuclease that always cuts DNA molecule at a particular point by recognising a specific sequence of six base pairs is:

NEET-(Oct)2020 [Biotechnology-Principles-and-Processes] [class-xii ]

• EcoR1
• Adenosine deaminase
• Thermostable DNA polymerase
• Hind II
Correct Option: D  [ Hind II ]

Remark:

Select the correct statement from the following:

NEET-(Oct)2020 [Biotechnology-Principles-and-Processes] [class-xii ]

• Gel electrophoresis is used for amplification of a DNA segment.
• The polymerase enzyme joins the gene of interest and the vector DNA.
• Restriction enzyme digestions are performed by incubating purified DNA molecules with the restriction enzymes of optimum conditions.
• PCR is used for isolation and separation of gene of interest.
Correct Option: C  [ Restriction enzyme digestions are performed by incubating purified DNA molecules with the restriction enzymes of optimum conditions. ]

Remark:

In a mixture, DNA fragments are separated by:

NEET-(Oct)2020 [Biotechnology-Principles-and-Processes] [class-xii ]

• Bioprocess engineering
• Restriction digestion
• Electrophoresis
• Polymerase chain reaction
Correct Option: C  [ Electrophoresis ]

Remark:

In Recombinant DNA technology antibiotics are used:

NEET-(Oct)2020 [Biotechnology-Principles-and-Processes] [class-xii ]

• to keep medium bacteria-free
• to detect alien DNA
• to impart disease-resistance to the host plant
• as selectable markers
Correct Option: D  [ as selectable markers ]

Remark:

RNA interference is used for which of the following purposes in the field of biotechnology?

NEET-(Oct)2020 [Biotechnology-and-its-applications] [class-xii ]

• to develop a plant tolerant to abiotic stresses
• to develop a pest resistant plant against infestation by nematode
• to enhance the mineral usage by the plant
• to reduce post harvest losses
Correct Option: B  [ to develop a pest resistant plant against infestation by nematode ]

Remark:

The laws and rules to prevent unauthorised exploitation of bio-resources are termed as:

NEET-(Oct)2020 [Biotechnology-and-its-applications] [class-xii ]

• Biopatenting
• Bioethics
• Bioengineering
• Biopiracy
Correct Option: A  [ Biopatenting ]

Remark: