Receptors for sperm binding in mammals are present on:

NEET-2021 Human-Reproduction [class-xii ]

• Corona radiata
• Vitelline membrane
• Perivitelline space
• Zona pellucida
Correct Option: D  [ Zona pellucida ]

Remark:

Match List-I with List-II.

NEET-2021 Reproductive-Health [class-xii ]

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

Remark:

Veneral diseases can spread through:
A. Using sterile needles
B. Transfusion of blood from infected person
C. Infected mother to foetus
D. Kissing
E. Inheritance
Choose the correct answer from the options given below.

NEET-2021 Reproductive-Health [class-xii ]

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

Remark:

Which one of the following is an example of Hormone releasing IUD?

NEET-2021 Reproductive-Health [class-xii ]

• CuT
• LNG 20
• Cu 7
• Multiload 375
Correct Option: B  [ LNG 20 ]

Remark:

In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?

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

• 50%
• 75%
• 25%
• 100%
Correct Option: C  [ 25% ]

Remark:

If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it ?

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

• T : 20; G : 30; C : 20
• T : 20; G : 20; C : 30
• T : 30; G : 20; C : 20
• T : 20; G : 25; C : 25
Correct Option: C  [ T : 30; G : 20; C : 20 ]

Remark:

Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?

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

• DNA dependent DNA polymerase
• DNA dependent RNA polymerase
• DNA Ligase
• DNase
Correct Option: B  [ DNA dependent RNA polymerase ]

Remark:

Which of the following RNAs is not required for the synthesis of protein?

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

• mRNA
• tRNA
• rRNA
• siRNA
Correct Option: D  [ siRNA ]

Remark:

Which of the following is not an objective of Biofortification in crops?

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

• Improve protein content
• Improve resistance to diseases
• Improve vitamin content
• Improve micronutrient and mineral content
Correct Option: B  [ Improve resistance to diseases ]

Remark:

Match List-I with List-II.

NEET-2021 Microbes-in-Human-Welfare [class-xii ]

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

Remark: