The first phase of translation is:

NEET-(Sept)2020 Molecular-Basis-of-Inheritance [class-xii ]

• Binding of mRNA to ribosome
• Recognition of DNA molecule
• Aminoacylation of tRNA
• Recognition of an anti-codon
Correct Option: C  [ Aminoacylation of tRNA ]

Remark:

The specific palindromic sequence which is recognized by EcoRI is:

NEET-(Sept)2020 Molecular-Basis-of-Inheritance [class-xii ]

• 5'-GAATTC-3'
  3'-CTTAAG-5'
• 5'-GGAACC-3'
  3'-CCTTGG-5'
• 5'-CTTAAG-3'
  3'-GAATTC-5'
• 5'-GGATCC-3'
  3'-CCTAGG-5'
Correct Option: A  [ 5'-GAATTC-3'
3'-CTTAAG-5' ]

Remark:

From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask:

NEET-(Sept)2020 Evolution [class-xii ]

• CH₄, H₂, NH₃ and water vapor at 800°C
• CH₃, H₂, NH₄ and water vapor at 800°C
• CH₄, H₂, NH₃ and water vapor at 600°C
• CH₃, H₂, NH₃ and water vapor at 600°C
Correct Option: A  [ CH₄, H₂, NH₃ and water vapor at 800°C ]

Remark:

Embryological support for evolution was disapproved by:

NEET-(Sept)2020 Evolution [class-xii ]

• Karl Ernst von Baer
• Alfred Wallace
• Charles Darwin
• Oparin
Correct Option: A  [ Karl Ernst von Baer ]

Remark:

Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?
A. Darwin's Finches of Galapagos islands.
B. Herbicide resistant weeds.
C. Drug resistant eukaryotes.
D. Man-created breeds of domesticated animals like dogs.

NEET-(Sept)2020 Evolution [class-xii ]

• only (A)
• (A) and (C)
• (B), (C) and (D)
• only (D)
Correct Option: C  [ (B), (C) and (D) ]

Remark:

Flippers of Penguins and Dolphins are examples of:

NEET-(Sept)2020 Evolution [class-xii ]

• Adaptive radiation
• Convergent evolution
• Industrial melanism
• Natural selection
Correct Option: B  [ Convergent evolution ]

Remark:

Match the following diseases with the causative organism and select the correct option.

NEET-(Sept)2020 Human-Health-and-Disease [class-xii ]

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

Remark:

The infectious stage of Plasmodium that enters the human body is:

NEET-(Sept)2020 Human-Health-and-Disease [class-xii ]

• Trophozoites
• Sporozoites
• Female gametocytes
• Male gametocytes
Correct Option: B  [ Sporozoites ]

Remark:

Identify the wrong statement with reference to immunity.

NEET-(Sept)2020 Human-Health-and-Disease [class-xii ]

• When exposed to antigen (living or dead) antibodies are produced in the host’s body. It is called "Active immunity".
• When ready-made antibodies are directly given, it is called "Passive immunity".
• Active immunity is quick and gives full response.
• Foetus receives some antibodies from mother, it is an example for passive immunity.
Correct Option: C  [ Active immunity is quick and gives full response. ]

Remark:

By which method was a new breed 'Hisardale' of sheep formed by using Bikaneri ewes and Marino rams?

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

• Out crossing
• Mutational breeding
• Cross breeding
• Inbreeding
Correct Option: C  [ Cross breeding ]

Remark: