Home NEET Botany MCQs NEET Zoology MCQs NEET Syllabus

📚

NEET Biology (Sept)2020 PYQs

Previous Year Questions • NCERT Based • Instant Feedback

📝 NEET (Sept)2020 📘 NCERT Focused 🤖 AI Explanations

Question 51 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Human Reproduction

Meiotic division of the secondary oocyte is completed:

Explanation:

The secondary oocyte is arrested in metaphase II and completes meiosis II only after fertilization. When a sperm fuses with the ovum, the oocyte finishes meiosis II, forming the mature ovum and a second polar body. Hence, the meiotic division is completed at the time of fusion of a sperm with an ovum (option 4).

🧠 Did You Know?

Fertilization triggers the last meiotic division, ensuring the haploid number is restored in the zygote.

💡 NCERT Memory Line:

The secondary oocyte completes meiosis II only upon fertilization, forming the mature ovum.

Question 52 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Reproductive Health

Select the option including all sexually transmitted diseases.

Explanation will be generated when opened.

Question 53 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Reproductive Health

In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?

Explanation will be generated when opened.

Question 54 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Principles Of Inheritance And Variation

How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

Explanation will be generated when opened.

Question 55 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Principles Of Inheritance And Variation

Identify the wrong statement with reference to the gene 'I' that controls ABO blood groups.

Explanation will be generated when opened.

Question 56 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Principles Of Inheritance And Variation

Experimental verification of the chromosomal theory of inheritance was done by:

Explanation will be generated when opened.

Question 57 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Principles Of Inheritance And Variation

Select the correct match.

Explanation will be generated when opened.

Question 58 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Molecular Basis Of Inheritance

Name the enzyme that facilitates opening of DNA helix during transcription.

Explanation will be generated when opened.

Question 59 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Molecular Basis Of Inheritance

Which of the following statements is correct?

Explanation will be generated when opened.

Question 60 of 90

🟢 NEET (Sept)2020 📘 CLASS XII 🌿 Molecular Basis Of Inheritance

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6×10⁹ bp, then the length of the DNA is approximately:

Explanation will be generated when opened.