Biology questions with answers

2,759 multiple-choice questions. Open any question for its answer and explanation.

Questions asked in State PSC and UPSC prelims, by topic. Each topic also has notes to read.

Read the notes: Reproduction and Embryo Development →

1. Structure connecting the foetus to placenta is:Asked in OPSC CS Prelims 2019
2. Thyroxin is an iodine rich organic compound mainly found inAsked in law officier 2025
3. What are two main hormones secreted by thyroid gland ?Asked in PA High Court Mains
4. Syngamy results in formation ofAsked in UPSC CDS 1 2017
5. After reaching the female genital tract, human sperms retain their fertilizing capacity forAsked in UPPSC Upper Mains 2010
6. In which part of female reproductive system, does fertilization usually occur?Asked in JUNIOR laboratory assistant 2025
7. Which of the following is the first to break the proper sequence:Asked in RPSC RAS Prelims 1995
8. What is the chromosome number in human ovum?Asked in WBPSC CS Prelims 2022
9. Corpus luteum is a mass of cells found inAsked in UPPCS Prelims 1997
10. "The oocytes increases in size from immature to mature one. The Yolk deposition starts and oocyte turns to primary stage." The statements are given for which developmental stage of ovum ? - Question not attemptedAsked in Asst. Fisheries Development Officer 2024
11. Which of the following roles is/are played by epididymis, vas deferens, seminal vesicles and prostate in male reproductive system of human?Asked in UPSC CDS 2 2018
12. Which one of the following is NOT a component of human male reproductive system ?Asked in UPSC NDA 2 2020
13. The testis, male gonad, is located inside the scrotum in order to keep testicular temperature :Asked in OPSC CS Prelims 2016
14. शुक्राणु के एक्रोसोम का Ǔनमार्तण होता है :Asked in Assistant Prosecuting Officer (APO) Exam 2021
15. Which among the following is correct statement ?Asked in Co operative Supervisor & Environment Supervisor (Group C) Exam 2023
16. Which of the following statements regarding asexual reproductive structures in Fungi and Simple plants is/are TRUE? 1. Zoospores are flagellated motile spores produced inside a parent cell called zoosporangia. 2. Conidia are non-motile spores produced singly or in chains by constriction at the tip or laterally on special hyphal branches called conidiophores. 3. Gemmules are endogenous bud that are simply a copy of parent nucleus with a small amount of cytoplasm and a protective covering around. Choose the correct answer from the options given below:Asked in HAS Prelims 2022
17. Which of the following rays/waves are used to know the growth of fetus in the womb?Asked in BPSC Prelims Exam 67th Cancelled
18. Consider the following statements. Assertion (A) : A drinking expectant mother can harm the embryo. Reason (R) : The alcohol can pass directly into the blood stream of the fetus.Asked in TNPSC CS Prelims 2014
19. Recently developed technique for monitoring foetal growth is:Asked in UPPSC Upper Mains 2006
20. Gestation period of cow is ______ days.Asked in Food Safety Officer 2019
21. What is the most important management activity required for advance pregnant cows?Asked in Food Safety Officer 2022
22. In artificial insemination (AI) process, which of the following is / are introduced into the uterus of the female ?Asked in UPSC CDS 1 2016 · GPSC Prelims CSP 2 2019
23. Which one of the following is the mechanism of action of oral contraceptive pills?Asked in UPSC NDA 1 2022
24. The sperms used for artificial insemination of cattle are stored in :Asked in UKPSC CS Prelims 2021
25. Commonest side effect of Cu-T:Asked in UPPSC Upper Mains 2014