Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which of the following set of animals are correctly identified as examples of Phylum Annelida?
The NCERT text lists 'Nereis, Pheretima (Earthworm) and Hirudinaria (Blood sucking leech)' as examples of Annelida. The other options are examples of Aschelminthes, Arthropoda, and Mollusca respectively.
Considering the classification hierarchy, where would Annelida fit relative to other phyla like Arthropoda and Mollusca?
The NCERT text introduces Phylum - Annelida, Phylum - Arthropoda, and Phylum - Mollusca as distinct phyla within the Animal Kingdom. The summary table also lists them as separate phyla.
Which of the following best describes the primary goal of gene therapy?
As per the NCERT text, 'Gene therapy is the insertion of genes into an individual’s cells and tissues to treat diseases especially hereditary diseases.' This directly states the primary goal.
In the context of gene therapy, how does it primarily achieve its therapeutic effect?
The provided text states, 'It does so by replacing a defective mutant allele with a functional one or gene targeting which involves gene amplification.' This explains the mechanism of action for gene therapy.
The ethical concerns surrounding the manipulation of microbes, plants, and animals primarily arise from:
The NCERT text states, 'The current interest in the manipulation of microbes, plants, and animals has raised serious ethical questions.' While the text does not detail the specific ethical concerns, the general understanding in biotechnology is that altering biological systems raises questions about unintended consequences and societal impact.
Which of the following human diseases is NOT explicitly mentioned as having transgenic animal models developed for its study in the provided text?
The text lists, 'transgenic models exist for many human diseases such as cancer, cystic fibrosis, rheumatoid arthritis and Alzheimer’s.' Diabetes is mentioned in the context of insulin production but not as a disease for which transgenic animal models are explicitly developed according to this excerpt.
What is a 'disarmed pathogen' in the context of recombinant DNA technology and gene delivery?
The text describes, 'And the last method uses ‘disarmed pathogen’ vectors, which when allowed to infect the cell, transfer the recombinant DNA into the host.' A 'disarmed pathogen' implies that its harmful properties have been removed or inactivated, making it a safe vehicle for gene delivery.
Transgenic animals are utilized in biotechnology to study how genes contribute to disease development by serving as:
The NCERT text notes, 'Transgenic animals are also used to understand how genes contribute to the development of a disease by serving as models for human diseases, such as cancer, cystic fibrosis, rheumatoid arthritis and Alzheimer’s.'
Why are recombinant therapeutics generally preferred over similar products isolated from non-human sources?
The text explains, 'The recombinant therapeutics do not induce unwanted immunological responses as is common in case of similar products isolated from non-human sources.' The summary further adds, 'Since the recombinant therapeutics are identical to human proteins, they do not induce unwanted immunological responses and are free from risk of infection as was observed in case of similar products isolated from non-human sources.'
Gene therapy is primarily aimed at treating:
The text clearly states, 'Gene therapy is the insertion of genes into an individual’s cells and tissues to treat diseases especially hereditary diseases.'
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