This quiz works best with JavaScript enabled. Home > Science > Biology > Biology – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biology Quiz 6 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The number of individuals of a species per unit of area A) Population density. B) Microscopic. C) Disruption. D) Succession. Show Answer Correct Answer: A) Population density. 2. What step does every scientific experiment begin with? A) Hypothesis. B) Question/problem. C) Procedures. D) Conclusion. Show Answer Correct Answer: B) Question/problem. 3. Speed up chemical reactions, protects against infections, and structural component of hair, skin, and muscles A) Carbohydrates. B) Lipids. C) Proteins. D) Nucleic Acids. Show Answer Correct Answer: C) Proteins. 4. A resting state through the winter. A) Sleeping. B) Hibernation. C) Migration. D) Estivation. Show Answer Correct Answer: B) Hibernation. 5. Made of monomers of amino acids A) Carbohydrates. B) Lipids. C) Proteins. D) Nucleic Acids. Show Answer Correct Answer: C) Proteins. 6. Which of the following is a base that is NOT contained in DNA? A) Adenine. B) Thymine. C) Uracil. D) Guanine. Show Answer Correct Answer: C) Uracil. 7. Which features helps birds in flying? A) Vertebral column. B) Crop. C) Gizzard. D) Pneumatic bones. Show Answer Correct Answer: D) Pneumatic bones. 8. Which of the following are true of both leaf cells and root cells? I. they are undifferentiatedII. they are genetically identicalIII. they were formed at the edges of an apical meristem A) II only. B) III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: C) II and III only. 9. What causes the conversion of Pr to Pfr? A) Darkness. B) Red light. C) Far red light. D) Auxin. Show Answer Correct Answer: B) Red light. 10. The ..... control what enters and leaves the cell. A) Cell membrane. B) Cell wall. C) Nucleus. D) Cytoplasm. Show Answer Correct Answer: A) Cell membrane. 11. Which blood vessel carries the deoxygenated blood to the right atrium? A) Vena cava. B) Pulmonary vein. C) Pulmonary artery. D) All of them. Show Answer Correct Answer: A) Vena cava. 12. Which is less dense? A) Ice. B) Liquid water. C) Juice. D) All of the above. Show Answer Correct Answer: A) Ice. 13. The organelles responsible for the making of proteins: A) Central vacuoles, lysosomes, vesicles. B) Cell wall, smooth endoplasmic reticulum, nucleus. C) Ribosomes, rough endoplasmic reticulum, golgi apparatus. D) Nucleus, chloroplast, mitochondria. Show Answer Correct Answer: C) Ribosomes, rough endoplasmic reticulum, golgi apparatus. 14. Herpetology is the branch of ..... A) Biology. B) Mammalogy. C) Zoology. D) Anatomy. Show Answer Correct Answer: C) Zoology. 15. Which of the following nutrients is taken by the plants from the soil to synthesise protein? A) Carbon. B) Nitrogen. C) Hydrogen. D) Magnesium. Show Answer Correct Answer: B) Nitrogen. 16. The circulatory system works with the ..... system to obtain energy from nutrients that we eat. A) Respiratory. B) Digestive. C) Skeletal. D) Nervous. Show Answer Correct Answer: B) Digestive. 17. The movement of oxygen from the alveoli to the blood and from the blood to the tissues is due to the process of ..... A) Osmosis. B) Diffusion. C) Cytokinesis. D) Phagocytosis. Show Answer Correct Answer: B) Diffusion. 18. A process where cells are copied is called? A) Replication. B) Mitosis. C) Meiosis. D) Cellular respiration. Show Answer Correct Answer: B) Mitosis. 19. Microbiology is study of what? A) Study of plants. B) Study of microbes. C) Study of democracy. D) None of above. Show Answer Correct Answer: B) Study of microbes. 20. It is the study of insects. A) Ecology. B) Cytology. C) Entomology. D) Histology. Show Answer Correct Answer: C) Entomology. ← PreviousNext →Related QuizzesScience QuizzesBiology Quiz 1Biology Quiz 2Biology Quiz 3Biology Quiz 4Biology Quiz 5Biology Quiz 7Biology Quiz 8Biology Quiz 9Biology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books