Match the following columns and select the correct option.

NEET-(Sept)2020 Microbes-in-Human-Welfare [class-xi ]

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

Match the items in Column-I with those in Column-II :

NEET-(Oct)2020 Organisms-and-Populations [class-xii ]

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

Remark:

The impact of immigration on population density is:

NEET-(Oct)2020 Organisms-and-Populations [class-xii ]

• Negative
• Both positive and negative
• Neutralized by natality
• Positive
Correct Option: D  [ Positive ]

Remark:

According to Alexander von Humboldt:

NEET-(Oct)2020 Organisms-and-Populations [class-xii ]

• Species richness decreases with increasing area of exploration
• Species richness increases with increasing area, but only up to limit
• There is no relationship between species richness and area explored.
• Species richness goes on increasing with increasing area of exploration
Correct Option: B  [ Species richness increases with increasing area, but only up to limit ]

Remark:

Which of the following is not an attribute of a population?

NEET-(Sept)2020 Organisms-and-Populations [class-xii ]

• Sex ratio
• Natality
• Mortality
• Species interaction
Correct Option: D  [ Species interaction ]

Remark: