Practice free Biotechnology and its Applications (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
To detect an infection by a pathogen using ELISA, what can be detected?
The text states: 'Infection by pathogen can be detected by the presence of antigens (proteins, glycoproteins, etc.) or by detecting the antibodies synthesised against the pathogen.'
Which of these diagnostic methods involves the amplification of nucleic acids?
The context specifically mentions: '...very low concentration of a bacteria or virus (at a time when the symptoms of the disease are not yet visible) can be detected by amplification of their nucleic acid by PCR.'
What is the primary role of Recombinant DNA technology in molecular diagnostics, as suggested by the context?
The context groups Recombinant DNA technology with PCR and ELISA as 'some of the techniques that serve the purpose of early diagnosis.' While PCR involves amplification and ELISA involves antigen-antibody interactions, recombinant DNA technology encompasses broader genetic manipulation that can facilitate accurate diagnostics.
If a healthy individual's DNA is probed with a radioactive single-stranded DNA sequence corresponding to a known pathogenic gene, and no signal is detected via autoradiography, what does this indicate?
The principle for detecting mutated genes using a probe is that 'the probe will not have complementarity with the mutated gene.' Conversely, if a probe for a pathogen gene is used and no hybridization occurs (thus no signal), it implies the complementary sequence (the pathogenic gene) is absent in the individual's DNA.
What kind of molecules are typically detected as 'antigens' in the context of ELISA for pathogen detection?
The NCERT text states: 'Infection by pathogen can be detected by the presence of antigens (proteins, glycoproteins, etc.) or by detecting the antibodies synthesised against the pathogen.' This clearly indicates that antigens are often proteins or glycoproteins.
Which of the following bodies is responsible for making decisions regarding the validity of GM research and the safety of introducing GM-organisms for public services in India?
According to the NCERT text, 'Therefore, the Indian Government has set up organisations such as GEAC (Genetic Engineering Approval Committee), which will make decisions regarding the validity of GM research and the safety of introducing GM-organisms for public services.'
What is the primary concern mentioned in the NCERT text regarding the introduction of genetically modified organisms into the ecosystem?
The NCERT text states, 'Genetic modification of organisms can have unpredict able results when such organisms are introduced into the ecosystem.'
The public anger surrounding patents granted for biological resources is primarily due to:
The NCERT text highlights this issue: 'There is growing public anger that certain companies are being granted patents for products and technologies that make use of the genetic materials, plants and other biological resources that have long been identified, developed and used by farmers and indigenous people of a specific region/country.'
Ethical standards are required in biotechnology to evaluate the morality of all human activities that might:
The NCERT text mentions, 'Some ethical standards are required to evaluate the morality of all human activities that might help or harm living organisms.'
Which of the following is NOT listed as a potential ethical concern or issue related to biotechnology in the provided text?
The text discusses unpredictable results, patent anger, and the morality of manipulation. The rapid pace of technological development, while true, is not specifically mentioned as an ethical issue concerning biotechnology within the provided context.
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