This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Biology > Biology – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biology Quiz 20 (19 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is a hydrogen bond? A) When one substance is dissolved into another. B) Bonds between water and other molecules. C) A weak intermolecular force. D) Polar molecules that can attract each other. Show Answer Correct Answer: C) A weak intermolecular force. 2. What macromolecule makes up the genetic code? A) Nucleic acid. B) Lipid. C) Carbohydrate. D) Protein. Show Answer Correct Answer: A) Nucleic acid. 3. Why do animals need Nitrogen? A) To build fats. B) To build proteins. C) To make carbohydrates. D) For energy. Show Answer Correct Answer: B) To build proteins. 4. An organism that produces its own food supply from inorganic compounds is called a(an) A) Autotroph. B) Detritivore. C) Heterotroph. D) Consumer. Show Answer Correct Answer: A) Autotroph. 5. Which pair of structures best shows that plant cells have functions different from animal cells? A) Cytoplasm and mitochondria. B) Chloroplasts and cell wall. C) Ribosome and golgi. D) Nucleus and cell membrane. Show Answer Correct Answer: B) Chloroplasts and cell wall. 6. Why do scientists use sampling techniques to gather population data rather than counting everything? A) Scientists are lazy. B) Sampling is more efficient and achievable. C) Sampling is more accurate. D) Scientists prefer estimations. E) Sampling is cheaper. Show Answer Correct Answer: B) Sampling is more efficient and achievable. 7. Which 2 molecules contains the elements C-H-O and function pertains to energy? A) Lipids and Protein. B) Carbohydrates and Nucleic Acids. C) Protein and Carbohydrates. D) Carbohydrates and Lipids. Show Answer Correct Answer: D) Carbohydrates and Lipids. 8. Botany, Zoology, Genetics and Medicine are all parts of this main branch of Science. A) Toenail Science. B) Life Science. C) Earth Science. D) Physical Science. Show Answer Correct Answer: B) Life Science. 9. What kind of cells are made in MEIOSIS? A) Skin Cells. B) Haploid cells. C) Diploid Cells. D) Liver Cells. Show Answer Correct Answer: B) Haploid cells. 10. What describes the phase of quick entry of sodium ions into an axon during an action potential? A) Depolarization. B) Repolarization. C) Ion transport. D) Passive transport. Show Answer Correct Answer: A) Depolarization. 11. Active transport requires ....., moves materials from ....., and goes ..... the concentration gradient. A) ATP, low to high, with. B) No energy, low to high, against. C) ATP, high to low, with. D) ATP, low to high, against. Show Answer Correct Answer: D) ATP, low to high, against. 12. Where is xylem found in the plant? A) Root hairs $\rightarrow$ leaves $\rightarrow$ veins. B) Roots $\rightarrow$ stem $\rightarrow$ leaves. C) Stem $\rightarrow$ roots. D) Leave $\rightarrow$ roots $\rightarrow$ stem. Show Answer Correct Answer: B) Roots $\rightarrow$ stem $\rightarrow$ leaves. 13. Transpiration involves the evaporation and diffusion of water vapour.What happens to the water vapour during transpiration? A) Diffusion from stomata followed by evaporation through mesophyll cells. B) Evaporation from mesophyll cells followed by diffusion through stomata. C) Evaporation from stomata followed by diffusion through mesophyll cells. D) Diffusion from mesophyll cells followed by evaporation through stomata. Show Answer Correct Answer: B) Evaporation from mesophyll cells followed by diffusion through stomata. 14. Which of the following cell types is formed by meiosis? A) Muscle cells. B) Sperm cells. C) Skin cells. D) Blood cells. Show Answer Correct Answer: B) Sperm cells. 15. Who was the person who used his microscope to observe a thin slice of cork, and concluded that the cork was made up of cells? A) Robert Hooke. B) Bill Nye. C) Matthias Schleiden. D) Rudolf Virchow. Show Answer Correct Answer: A) Robert Hooke. 16. Which of the below ISN'T a hormone A) Gaudetamine. B) Steroids. C) Adrenaline. D) Oxytocin. E) Dopamine. Show Answer Correct Answer: A) Gaudetamine. 17. Place these statements in the correct order.I. water enters root hairs by osmosisII. the solute concentration inside root hairs increasesIII. water enters xylem vessels by osmosisIV. mineral ions enter root hairs by active transport A) I $\rightarrow$ II $\rightarrow$ IV $\rightarrow$ III. B) IV $\rightarrow$ I $\rightarrow$ II $\rightarrow$ III. C) IV $\rightarrow$ II $\rightarrow$ I $\rightarrow$ III. D) I $\rightarrow$ IV $\rightarrow$ II $\rightarrow$ III. Show Answer Correct Answer: C) IV $\rightarrow$ II $\rightarrow$ I $\rightarrow$ III. 18. Which of the following best describes an ecosystem? A) All the living organisms in an area and their physical surroundings. B) A region with a distinct climate. C) All the living organisms of the same species throughout the world. D) All the living organisms in an area. Show Answer Correct Answer: A) All the living organisms in an area and their physical surroundings. 19. What hormone is responsible for the closing of stomata? A) Phytochrome. B) GA (Gibberellin). C) Auxin. D) Abscisic Acid. Show Answer Correct Answer: D) Abscisic Acid. ← PreviousRelated QuizzesScience QuizzesGeneral Knowledge QuizzesBiology Quiz 1Biology Quiz 2Biology Quiz 3Biology Quiz 4Biology Quiz 5Biology Quiz 6Biology Quiz 7Biology Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books