Year-wise Biology practice

RE-NEET 2026 Biology PYQs

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90 questions in this collection · Page 7 of 9

Question 61 of 90
🟢 Re NEET 2026 📘 CLASS XII

Organisms And Populations

Consider a population of 10 million cells. Given the per-capita birth rate of 0.002 (per unit time) and the per-capita death rate of 0.002 (per unit time), the expected number of cells after 10 generations is
Since the per-capita birth rate equals the per-capita death rate, the population growth rate is zero. Therefore, the population size remains unchanged.
Question 62 of 90
🟢 Re NEET 2026 📘 CLASS XII

Biotechnology Principles And Processes

During PCR, primers bind to the DNA strands in the _______ step.
During the annealing step of PCR, primers bind to their complementary DNA sequences before DNA synthesis begins.
Question 63 of 90
🟢 Re NEET 2026 📘 CLASS XII

Biotechnology Principles And Processes

Given below are two statements:

Assertion (A): In recombinant DNA technology, lysozyme is used for disrupting bacterial cells while cellulase is used for plant cells.

Reason (R): Isolation of genetic material needs disruption of cells.

Choose the most appropriate answer from the options given below:
Lysozyme digests bacterial cell walls and cellulase digests plant cell walls. Cell disruption is necessary for DNA isolation, but the reason does not explain why different enzymes are used.
Question 64 of 90
🟢 Re NEET 2026 📘 CLASS XII

Evolution

Adaptive radiation in placental mammals and Australian marsupials leading to similarity between distant species is an example of
Placental mammals and Australian marsupials evolved similar adaptive features independently in similar habitats, demonstrating convergent evolution.
Question 65 of 90
🟢 Re NEET 2026 📘 CLASS XII

Human Health And Disease

Which of the following are secondary lymphoid organs?

(a) Bone marrow
(b) Tonsils
(c) Spleen
(d) Thymus

Choose the correct answer from the options given below:
Tonsils and spleen are secondary lymphoid organs. Bone marrow and thymus are primary lymphoid organs.
Question 66 of 90
🟢 Re NEET 2026 📘 CLASS XII

Human Reproduction

Which of the following hormones is not secreted by the human placenta?
The placenta secretes hCG, hPL, estrogens, progesterone and relaxin. LH is secreted by the anterior pituitary gland.
Question 67 of 90
🟢 Re NEET 2026 📘 CLASS XII

Molecular Basis Of Inheritance

Which of the following enzymes synthesizes precursor mRNA?
In eukaryotes, RNA polymerase II synthesizes heterogeneous nuclear RNA (hnRNA), the precursor of mRNA.
Question 68 of 90
🟢 Re NEET 2026 📘 CLASS XII

Biotechnology Principles And Processes

Given below are two statements:

Statement I: Plasmids are autonomously replicating DNA.

Statement II: Plasmids are extrachromosomal DNA.

In the light of the above statements, choose the most appropriate answer from the options given below:
Plasmids are small circular extrachromosomal DNA molecules that replicate independently of the bacterial chromosome.
Question 69 of 90
🟢 Re NEET 2026 📘 CLASS XII

Principles Of Inheritance And Variation

For a person with blood group 'O', which of the following is not a possible combination of parents' blood group genotypes?
A child with blood group O has genotype ii. Since the father (IAIB) has no i allele, this combination cannot produce an O blood group child.
Question 70 of 90
🟢 Re NEET 2026 📘 CLASS XII

Evolution

Given below are two statements:

Assertion (A): Forelimbs of humans and bats are homologous.

Reason (R): Forelimbs of humans and bats have similar anatomical structure.

In the light of the above statements, choose the most appropriate answer from the options given below:
Human and bat forelimbs have the same basic anatomical plan due to common ancestry. They are homologous organs that have evolved to perform different functions.
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