Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which type of antibody is primarily associated with allergic reactions?
The context states: 'The antibodies produced to these are of IgE type.' IgE antibodies are responsible for mediating allergic responses by binding to allergens and triggering mast cell degranulation, which releases inflammatory mediators.
What is the primary characteristic of an allergic response?
According to the NCERT text, 'The exaggerated response of the immune system to certain antigens present in the environment is called allergy.'
Which of the following chemicals are released from mast cells causing allergic symptoms?
The text explicitly states: 'Allergy is due to the release of chemicals like histamine and serotonin from the mast cells.'
Which of the following is NOT an autoimmune disease mentioned in the provided text?
The text mentions Rheumatoid arthritis as an autoimmune disease. Asthma is mentioned as an allergy-related disorder, not an autoimmune disease in this context. The other options are not mentioned in the provided text.
What is the term for substances that trigger an allergic immune response?
The text defines it as: 'The substances to which such an immune response is produced are called allergens.'
Which of the following plant species, introduced as a contaminant, has become a significant cause of pollen allergy in India?
The section on Sexual Reproduction in Flowering Plants mentions: 'It may be mentioned that Parthenium or carrot grass that came into India as a contaminant with imported wheat, has become ubiquitous in occurrence and causes pollen allergy.'
How can the cause of an allergy be determined according to the text?
The text describes the process: 'For determining the cause of allergy, the patient is exposed to or injected with very small doses of possible allergens, and the reactions studied.'
Which of the following drugs quickly reduce the symptoms of allergy?
The text states: 'The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy.'
The ability of higher vertebrates to differentiate foreign organisms from self-cells is a basis for:
The section 'Auto Immunity' starts by saying: 'Memory-based acquired immunity evolved in higher vertebrates based on the ability to differentiate foreign organisms (e.g., pathogens) from self-cells.'
An auto-immune disease occurs when the body attacks which of the following?
The text explains: 'sometimes, due to genetic and other unknown reasons, the body attacks self-cells. This results in damage to the body and is called auto-immune disease.'
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.