Which of the following represents a density-dependent factor affecting population growth?

The correct answer is C: Disease. Disease transmission increases with population density, making it a density-dependent factor. Natural disasters are density-independent.

Which of the following pathogens is the leading cause of congenital infections in the TORCH group?

The correct answer is C: Cytomegalovirus (CMV). CMV is the most common congenital infection, affecting 0.5-1% of live births and causing microcephaly, hearing loss, and developmental delays if acquired in utero.

Which enzyme is used to synthesize cDNA from mRNA in reverse transcription?

The correct answer is A: Reverse transcriptase. Reverse transcriptase, derived from retroviruses, synthesizes complementary DNA (cDNA) from an mRNA template, essential for expressing eukaryotic genes in prokaryotes.

Which of the following organisms exhibits indirect development with larval stages?

The correct answer is B: Frog. Frogs undergo indirect development with distinct larval stages (tadpole), while reptiles and birds show direct development without free-living larval forms.

Which of the following hormones is NOT produced by the anterior pituitary?

The correct answer is C: ADH. ADH (Antidiuretic hormone) is produced by the hypothalamus and stored/released by the posterior pituitary, not the anterior pituitary.

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NEET Zoology
Biotechnology & Applications

Zoology questions for NEET UG — Animal Kingdom, Human Physiology, Genetics, Evolution.

13 Q 6 Topics Take Mock Test

Difficulty: All Easy Medium Hard 11–13 of 13

Topics in NEET Zoology

All Animal Kingdom 100 Human Physiology 100 Genetics & Evolution 100 Reproductive Health 100 Ecology & Environment 100 Biotechnology & Applications 40

Q.11 Easy Biotechnology & Applications

Which of the following is a transgenic organism?

A Bt cotton

B Hybrid wheat

C Polyploid watermelon

D Mutant rice produced by irradiation

Correct Answer: A. Bt cotton

EXPLANATION

Bt cotton contains foreign genes from Bacillus thuringiensis, making it a true transgenic organism. Others are produced by conventional breeding or mutation.

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Q.12 Easy Biotechnology & Applications

What is the primary purpose of using plasmids in biotechnology?

A To store genetic information in prokaryotes

B As vectors for introducing foreign genes into host cells

C To produce antibodies in animals

D To facilitate photosynthesis

Correct Answer: B. As vectors for introducing foreign genes into host cells

EXPLANATION

Plasmids are small, circular DNA molecules used as vectors to carry and transfer foreign genes into host cells during genetic engineering.

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Q.13 Easy Biotechnology & Applications

Which enzyme is used to cut DNA at specific recognition sequences in genetic engineering?

A Restriction endonuclease

B DNA ligase

C DNA polymerase

D Helicase

Correct Answer: A. Restriction endonuclease

EXPLANATION

Restriction endonucleases recognize and cut DNA at specific palindromic sequences, producing sticky or blunt ends used in cloning.

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NEET Zoology Biotechnology & Applications

NEET Zoology
Biotechnology & Applications