Blog Log in Get Started Free

NEET Practice Questions (MCQs) with Answers & Solutions

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

All Physics Chemistry Botany Zoology

● ● ● ● ●

What is the general formula of an $\alpha$-amino acid, where R represents the side chain?

A. R-COOH B. R-NH2 C. R-CH(NH2)-COOH D. R-CO-NH-R'

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

Explanation

The NCERT Chemistry text (Table 10.2: Natural Amino Acids) shows the general structure: H2N - CH(R) - COOH or R - CH(NH2) - COOH. The Biology text also refers to them as substituted methanes with hydrogen, carboxyl, amino, and R groups on the $\alpha$-carbon.

● ● ● ● ●

Which of the following amino acids is characterized by a benzene ring in its side chain?

A. Serine B. Methionine C. Phenylalanine D. Histidine

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

Explanation

Looking at Table 10.2 (Natural Amino Acids) in the NCERT Chemistry text, Phenylalanine (Phe F) has C6H5-CH2- as its characteristic feature of the side chain, which includes a benzene ring.

● ● ● ● ●

An amino acid with an equal number of amino and carboxyl groups is classified as:

A. Acidic B. Basic C. Neutral D. Aromatic

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

Explanation

The NCERT Chemistry text states, 'Equal number of amino and carboxyl groups makes it neutral...'

● ● ● ● ●

Which property of amino acids leads to their amphoteric behavior?

A. Their optical activity B. Their ability to form peptide bonds C. The presence of both acidic carboxyl and basic amino groups (zwitterionic form) D. Their classification into essential and non-essential types

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

Explanation

The NCERT Chemistry text explains, 'In zwitter ionic form, amino acids show amphoteric behaviour as they react both with acids and bases.' This behavior arises from the presence of both acidic and basic groups.

● ● ● ● ●

Palmitic acid has 16 carbons. How many carbons does its R group contain, excluding the carboxyl carbon?

A. 15 B. 16 C. 17 D. 1

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

Explanation

The NCERT Biology text states, 'A fatty acid has a carboxyl group attached to an R group... Palmitic acid has 16 carbons including carboxyl carbon.' Therefore, the R group contains $16 - 1 = 15$ carbons.

● ● ● ● ●

Which of the following is considered a core technique that enabled the birth of modern biotechnology, as per the NCERT text?

A. Traditional hybridization procedures. B. Micro-injection of DNA. C. Genetic engineering. D. Continuous culture system.

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

Explanation

The NCERT text highlights: 'Among many, the two core techniques that enabled birth of modern biotechnology are : (i) Genetic engineering...'

● ● ● ● ●

What is the primary goal of genetic engineering techniques?

A. To accelerate natural selection. B. To alter the chemistry of genetic material (DNA and RNA). C. To develop new species through cross-breeding. D. To create sterile organisms for disease control.

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

Explanation

The NCERT text defines genetic engineering as: 'Techniques to alter the chemistry of genetic material (DNA and RNA)...'

● ● ● ● ●

Which term refers to the maintenance of a microbial contamination-free environment in chemical engineering processes for large-scale production?

A. Downstream processing. B. Genetic transformation. C. Bioprocess engineering. D. Recombinant DNA technology.

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

Explanation

The NCERT text states: '(ii) Bioprocess engineering: Maintenance of sterile (microbial contamination-free) ambience in chemical engineering processes to enable growth of only the desired microbe/eukaryotic cell in large quantities...'

● ● ● ● ●

Which of these is NOT an application area of biotechnology mentioned in the context?

A. Diagnostics. B. Waste treatment. C. Space exploration. D. Energy production.

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

Explanation

The applications of biotechnology listed are: therapeutics, diagnostics, genetically modified crops for agriculture, processed food, bioremediation, waste treatment, and energy production. Space exploration is not mentioned.

● ● ● ● ●

What are the two core techniques that enabled the birth of modern biotechnology?

A. Tissue culture and somatic hybridization. B. Genetic engineering and bioprocess engineering. C. Gene cloning and gene transfer. D. Micro-injection and biolistics.

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

Explanation

The NCERT text explicitly states: 'Among many, the two core techniques that enabled birth of modern biotechnology are : (i) Genetic engineering :... (ii) Bioprocess engineering :...'

Ready to ace NEET?

Free access · No credit card required

Browse All Questions Create Free Account

Frequently Asked Questions

Yes. You can attempt every NEET 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.