NEET Zoology - MCQ Practice Questions

During embryonic development, the notochord is primarily derived from which germ layer?

A 32-year-old woman presents with secondary infertility and dysmenorrhea. Imaging shows thickened endometrial tissue outside the uterus. What is the most likely diagnosis?

Which of the following conditions is associated with increased risk of gestational diabetes mellitus?

A pregnant woman presents with vaginal bleeding in the first trimester and a positive pregnancy test. Pelvic ultrasound shows an empty uterus. What is the most likely diagnosis?

Which of the following is the mechanism of action of levonorgestrel as an emergency contraceptive?

A 24-year-old woman with irregular cycles is diagnosed with polycystic ovary syndrome. Which hormonal finding is most characteristic?

Which statement about human milk lactation is correct?

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

During spermatogenesis, which cell type directly gives rise to mature spermatozoa?

A 40-year-old man presents with erectile dysfunction and is found to have low testosterone levels. Which of the following hormones directly stimulates testosterone production in Leydig cells?

A 28-year-old woman has not conceived after 18 months of unprotected intercourse. Which investigation should be performed FIRST?

A 32-year-old man presents with azoospermia. Semen analysis shows normal seminal fluid parameters but absence of spermatozoa. What is the most likely diagnosis?

A 26-year-old woman with history of pelvic inflammatory disease presents with infertility. Which imaging modality is MOST appropriate to assess tubal patency?

A woman using combined oral contraceptive pills (COCs) presents with breakthrough bleeding. Which action should be taken?

Which contraceptive method is absolutely contraindicated in women with current or history of breast cancer?

A 34-year-old man has oligozoospermia with motility of 20%. Which of the following is the most likely etiology?

What is the window period during which emergency contraception is most effective?

Which of the following best describes the mechanism of action of levonorgestrel IUD in preventing pregnancy?

A 31-year-old woman presents with secondary amenorrhea and infertility. Blood tests show elevated prolactin levels. What is the next appropriate investigation?

A 35-year-old woman with polycystic ovary syndrome (PCOS) seeks contraception with metabolic benefits. Which method would be most appropriate?