Blog Log in Get Started Free

Zoology MCQs for NEET — Practice Questions with Answers

Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

All Physics Chemistry Botany Zoology

Chapter Language Difficulty Show only questions I answered incorrectly Register free to filter questions

● ● ● ● ●

The ability of retroviruses to transform normal cells into cancerous cells has been adapted in biotechnology for what purpose?

A. To develop new vaccines. B. To understand gene regulation in plants. C. To generate knowledge for transforming pathogens into useful vectors for delivering genes. D. To produce recombinant proteins on a large scale.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

A better understanding of the art of delivering genes by pathogens in their eukaryotic hosts has generated knowledge to transform these tools of pathogens into useful vectors for delivering genes of interest to humans. (NCERT, Biotechnology - Principles and Processes)

● ● ● ● ●

In the context of recombinant DNA technology and gene delivery, what is a 'disarmed pathogen'?

A. pathogen that has been rendered inactive by antibiotics. B. disease-causing organism that has had its virulence genes removed, making it safe to use as a vector. C. bacterial strain used for producing toxins. D. pathogen that has lost its ability to infect hosts.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The text mentions 'disarmed pathogen' vectors, which when allowed to infect the cell, transfer the recombinant DNA into the host. This implies that their disease-causing ability has been removed or 'disarmed' while retaining their gene delivery mechanism. (NCERT, Biotechnology - Principles and Processes)

● ● ● ● ●

Which biotechnological technique is explicitly mentioned for directly injecting recombinant DNA into the nucleus of an animal cell?

A. Biolistics B. Heat shock method C. Micro-injection D. Electroporation

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

In a method known as micro-injection, recombinant DNA is directly injected into the nucleus of an animal cell. (NCERT, Biotechnology - Principles and Processes)

● ● ● ● ●

According to the NCERT text, which of the following is NOT a component of the comprehensive definition of 'health'?

A. Physical well-being B. Mental well-being C. Economic prosperity D. Social well-being

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT text defines health as 'a state of complete physical, mental and social well-being.' While economic prosperity can be a result of health ('When people are healthy, they are more efficient at work. This increases productivity and brings economic prosperity.'), it is not part of the definition of health itself.

● ● ● ● ●

Which of the following historical perspectives on health was disproved by scientific methods like the discovery of blood circulation by William Harvey and the use of a thermometer?

A. The concept of infectious diseases B. The 'good humor' hypothesis C. The role of pathogens in disease etiology D. The influence of lifestyle on health

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT text states, 'The discovery of blood circulation by William Harvey using experimental method and the demonstration of normal body temperature in persons with blackbile using thermometer disproved the 'good humor' hypothesis of health.' This contrasts with early Greek and Indian Ayurveda systems that asserted a balance of certain humors determined health.

● ● ● ● ●

Which of the following measures is essential for achieving good health, particularly in preventing infectious diseases?

A. Avoiding all forms of physical exercise B. Exclusive reliance on antibiotics for every illness C. Vaccination against infectious diseases and proper waste disposal D. Consuming only processed foods for convenience

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT text lists 'Awareness about diseases and their effect on different bodily functions, vaccination (immunisation) against infectious diseases, proper disposal of wastes, control of vectors and maintenance of hygiene in food and water resources are necessary for achieving good health.'

● ● ● ● ●

The broad definition of 'reproductive health' by the World Health Organization (WHO) encompasses:

A. Only the physical aspect of reproduction B. Physical, emotional, and behavioral aspects, excluding social C. Total well-being in all aspects, including physical, emotional, behavioral, and social D. Primarily the absence of sexually transmitted infections

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

According to the NCERT, 'According to the World Health Organisation (WHO), reproductive health means a total well-being in all aspects of reproduction, i.e., physical, emotional, behavioural and social.'

● ● ● ● ●

Which statement regarding diseases, as per NCERT, is correct?

A. All diseases are infectious and easily transmitted. B. Absence of disease is a complete definition of health. C. Diseases occur when organ functioning is adversely affected, characterized by signs and symptoms. D. Cancer is exclusively an infectious disease.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT states, 'When the functioning of one or more organs or systems of the body is adversely affected, characterised by appearance of various signs and symptoms, we say that we are not healthy, i.e., we have a disease.' It also clarifies that health is not just the 'absence of disease' and that cancer is a 'non-infectious disease'.

● ● ● ● ●

Among the common causes of death mentioned in the context, what is identified as a major cause of death among non-infectious diseases?

A. AIDS B. Typhoid C. Cancer D. Malaria

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The text states, 'Among non-infectious diseases, cancer is the major cause of death.' AIDS is mentioned as a fatal infectious disease.

● ● ● ● ●

Pathogens are described as disease-causing organisms. What is their general characteristic related to the host?

A. They always form a symbiotic relationship beneficial to the host. B. They only cause harm when outside the host's body. C. They cause harm to the host by living in (or on) them. D. They are exclusively viruses.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT defines pathogens as 'Such disease-causing organisms... Most parasites are therefore pathogens as they cause harm to the host by living in (or on) them.'

Ready to ace NEET?

Free access · No credit card required

Browse All Questions Create Free Account

Frequently Asked Questions

Yes. You can attempt every Zoology question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.

No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.

The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.