All Free Biology MCQs with Answers
Every Biology question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
19,844 questions · page 802 of 993
- A. When the ovum is discharged from the ovary
- B. Just before the fertilization
- C. Before the onset of menstruation
- D. When the oocyte is fertilized by sperm
Explanation: Explanation for this question will be added soon.
Correct answer: When the oocyte is fertilized by sperm- A. Corpus luteum
- B. Graafian follicle
- C. Primary follicle
- D. Germinal epithelium
Explanation: Graafian follicle is a fluid-filled sac that surrounds the developing egg.
Correct answer: Graafian follicle- A. Lactation
- B. Ovulation
- C. Placenta formation
- D. Menstruation
Explanation: The discharge of an ovum from the ovary is called ovulation.
Correct answer: Ovulation- A. Common
- B. Independent
- C. Both A and B
- D. None of these
Explanation: Urethra and vagina have independent opening. The opening of urethra is infront of the vagina and that of the vagina is between urethra and…
Correct answer: Independent- A. 250
- B. 300
- C. 350
- D. 400
Explanation: Generally the average loss of blood during birth is about 350 cm3. However, it varies from person to person and depends upon the length of…
Correct answer: 350- A. Oviduct
- B. Ovary
- C. Uterus
- D. Vagina
Explanation: The vagina acts as the birth canal during childbirth. It is a muscular tube that connects the uterus to the outside of the body.
Correct answer: Vagina- A. Summoned
- B. Whose
- C. Them
- D. Number
Explanation: The sentence should read: "The king summoned the father and mother of the boy, whose consent he got by giving them a huge amount of wealth."
Correct answer: Number- A. Smoking
- B. A major contributor
- C. Diseases
- D. The lung cancer
Explanation: "The lung cancer" should be "lung cancer" (without the definite article "the"), as it's one example of the many serious diseases caused by…
Correct answer: The lung cancer- A. hack
- B. spectacle
- C. phenomenon
- D. talent
Explanation: Beethoven was a musical talent, indicating his natural ability and skill, which was evident even at a young age.
Correct answer: talent- A. A state of the art printer is not that expensive
- B. State of the art printer is not that expensive
- C. A state of - the art printer is not that expensive
- D. A state of the art printer are not that expensive
Explanation: "State of the art" is a compound adjective that should be hyphenated when it precedes the noun "printer." The hyphens help clarify that…
Correct answer: A state of the art printer is not that expensive- A. A. If statement I is the cause and statement II is its effect;
- B. B. If statement II is the cause and statement I is its effect;
- C. C. If both the statements I and II are independent causes;
- D. D. If both the statements I and II are effects of independent causes;
- E. E. If both the statements I and II are effects of some common cause;
Explanation: Statement I indicates a significant increase in unemployment, which can logically lead to statement II, where more candidates apply for…
Correct answer: A. If statement I is the cause and statement II is its effect;- A. ABF
- B. ABD
- C. BFC
- D. BDF
- E. None of them.
Explanation: The correct group of brothers is A, B, and F. Here's the breakdown: D is the father of A and the grandfather of F, indicating a direct…
Correct answer: ABF- A. 1
- B. 2
- C. 3
- D. 4
Explanation: Figure 2 breaks the sequence pattern when moving in an Anti-clockwise direction, as the numbers do not follow a logical sequence.
Correct answer: 2- A. If only I follows
- B. If only II follows
- C. If either I or II follows
- D. If neither I nor II follows
- E. If both I and II follow
Explanation: The correct answer is Option A: If only I follows. Initiating night patrolling by the police is a prudent and immediate action to enhance…
Correct answer: If only I follows- A. A. If statement I is the cause and statement II is its effect;
- B. B. If statement II is the cause and statement I is its effect;
- C. C. If both the statements I and II are independent causes;
- D. D. If both the statements I and II are effects of independent causes;
- E. E. If both the statements I and II are effects of some common cause;
Explanation: The correct answer is Option A. Statement I, which mentions the government's import of large quantities of sugar, is the cause leading to…
Correct answer: A. If statement I is the cause and statement II is its effect;16036. Chest cavity is bounded by ribs and muscles on the sides, while the floor of chest cavity is called:
- A. Pleura
- B. Alveoli
- C. Chest cage
- D. Diaphragm
Explanation: Chest cavity is bounded by ribs, muscles and diaphragm
Correct answer: Diaphragm- A. Scorpion
- B. Earthworm
- C. Frog
- D. Cockroaches
- E. Fish
Explanation: A book lung is a type of respiration organ used for atmospheric gas exchange that is present in many arachnids, such as scorpions and…
Correct answer: Scorpion- A. Histoplasmosis
- B. Tuberculosis
- C. Cystic fibrosis
- D. None of the given options
Explanation: Options B and C are easier to eliminate. Use the figure below to help remember why to eliminate histoplasmosis.
Correct answer: None of the given options- A. Carbon dioxide
- B. Oxygen
- C. Dust
- D. Carbon Monoxide
Explanation: Goblet cells produce mucus that traps the dust particles; this mucus is then beaten by cilia.
Correct answer: Dust- A. O2
- B. CO2
- C. CO
- D. H2
Explanation: If the pH of blood is lower than normal (normal physiological pH is 7.4), then the haemoglobin does not bind oxygen as well.
Correct answer: O2