What is the role of a selectable marker gene in cloning vectors?

The correct answer is B: To identify and select cells that have taken up the recombinant plasmid. Selectable marker genes (like antibiotic resistance genes) allow researchers to identify and select only those cells that have successfully incorporated the recombinant plasmid.

Which succession type occurs on newly formed volcanic islands like those in the Indian Ocean?

The correct answer is B: Primary succession. Primary succession occurs on bare, lifeless substrates where no soil exists, such as newly formed volcanic islands.

Which of the following represents the correct order of organization in genetic material?

The correct answer is C: Nucleotide → DNA → Gene → Chromosome. The correct hierarchical order is: Nucleotide (basic unit) → DNA (polymer of nucleotides) → Gene (segment of DNA) → Chromosome (condensed DNA with proteins).

Which statement accurately describes the relationship between respiratory rate and blood CO2 levels?

The correct answer is B: Increased CO2 stimulates chemoreceptors, increasing respiratory rate. Central and peripheral chemoreceptors detect increased CO2 (and decreased pH), sending signals to respiratory centers to increase ventilation rate.

Which class of animals shows maximum biological diversity and why?

The correct answer is B: Insecta - due to adaptability, shorter life cycles, and diverse ecological niches. Insects represent over 80% of described animal species due to their adaptability, rapid reproduction, metamorphosis, and ability to occupy diverse ecological niches.

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NEET Zoology
Reproductive Health

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

52 Q 6 Topics Take Mock Test

Difficulty: All Easy Medium Hard 51–52 of 52

Topics in NEET Zoology

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

Q.51 Medium Reproductive Health

In females, the LH surge causes:

A Follicle development

B Ovulation

C Menstruation

D Corpus luteum degeneration

Correct Answer: B. Ovulation

EXPLANATION

The LH (Luteinizing Hormone) surge triggers ovulation, the release of a mature ovum from the ovary, typically occurring around day 14 of the menstrual cycle.

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Q.52 Medium Reproductive Health

What is the role of GnRH in reproductive health?

A Stimulates growth of secondary sexual characters

B Stimulates pituitary to release FSH and LH

C Inhibits ovulation

D Maintains pregnancy

Correct Answer: B. Stimulates pituitary to release FSH and LH

EXPLANATION

GnRH (Gonadotropin-Releasing Hormone) from the hypothalamus stimulates the anterior pituitary to release FSH and LH, initiating the reproductive cycle.

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NEET Zoology Reproductive Health

NEET Zoology
Reproductive Health