This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Bases – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Bases Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The roots aster, astr and astro (from Greek) mean "stars." If you want to study stars, planets and asteroids, then you might become an astronomer.The symbol * is called an asterisk since it looks like a star. "Naut" is a root word that means "relating to the sea, ships or travelers." What would we call someone who travels into space among the stars? A) Telenaut. B) Astronaut. C) Photonaut. D) Portonaut. Show Answer Correct Answer: B) Astronaut. 2. What does the Latin root jud mean? A) Judge. B) Bad. C) To send. D) Prejudice. Show Answer Correct Answer: A) Judge. 3. Which pH represents the solution with the lowest Hydroxide ion concentration A) PH=1. B) PH=3. C) PH=7. D) PH=11. Show Answer Correct Answer: A) PH=1. 4. Which of the following is a common property of bases? A) They taste sour. B) They feel slippery. C) They turn red litmus paper blue. D) They release H+ ions in water. Show Answer Correct Answer: C) They turn red litmus paper blue. 5. Reacts with blue litmus paper turning it red A) Acid. B) Base. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Acid. 6. Which Greek base means 'city'? A) Polis. B) Bio. C) Geo. D) Therm. Show Answer Correct Answer: A) Polis. 7. What is neutral on the pH scale? A) 7. B) 14. C) P shape. D) H shape. Show Answer Correct Answer: A) 7. 8. What type of bonds form between the nucleotide bases of the separate strands of the double stranded helix of DNA? A) Peptide bonds. B) Hydrogen bonds. C) Covalent bonds. D) Basic bonds. Show Answer Correct Answer: B) Hydrogen bonds. 9. Which of the following is a property of an acid? A) PH > 7. B) Turns litmus paper blue. C) Tart or sour taste. D) Corrosive to organic materials. Show Answer Correct Answer: C) Tart or sour taste. 10. Given that x$_{5}$ = 35$_{10, }$then x = A) 10. B) 12. C) 20. D) 120. Show Answer Correct Answer: D) 120. 11. What does the Latin root cent mean? A) Penny. B) One thousand. C) Dance. D) One hundred. Show Answer Correct Answer: D) One hundred. 12. Which sequence of DNA bases would pair with this partial strandATG TGA CAG A) ATG TGA CAG. B) TAC ACT GTC. C) GTA AGT GAC. D) Cat TCA CTG. Show Answer Correct Answer: B) TAC ACT GTC. 13. Identify the cardinality of the statement:a film actor has worked on one or more films throughout his career and in each film they have worked on an actors cast. A) Many to many. B) One to many. C) One by one. D) None of the above. Show Answer Correct Answer: A) Many to many. 14. What is the meaning of the Greek base 'chron'? A) Time. B) Earth. C) Life. D) Heat. Show Answer Correct Answer: A) Time. 15. Which substance has a sour taste? A) Acids. B) Bases. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acids. 16. What does the Latin root fac mean? A) To make, to do. B) Break. C) Strength. D) To throw. Show Answer Correct Answer: A) To make, to do. 17. What does DNA stand for? A) Deoxyribonucleic acid. B) Denitrogenous acid. C) Deribonucleic acid. D) Diribonucleic acid. Show Answer Correct Answer: A) Deoxyribonucleic acid. 18. Which Greek base means 'star'? A) Astro. B) Bio. C) Geo. D) Therm. Show Answer Correct Answer: A) Astro. 19. How does DNA in cells determine an organism's complex traits? A) DNA contains codes for proteins, which are necessary for the growth and fuctioning of an organism. B) DNA seperates into long single strands that make up each part of an organism. C) DNA produces the energy an organism needs in order to grow. D) DNA folds into the nucleus of each of the cells of an organism. Show Answer Correct Answer: A) DNA contains codes for proteins, which are necessary for the growth and fuctioning of an organism. 20. Which of the following is an example of a neutralization reaction? A) . B) . C) . D) . Show Answer Correct Answer: A) . 21. What enzymes are involved in DNA replication? A) Helicase, catalase. B) RNA polymerase, catalase. C) Helicase, DNA polymerase. D) DNA polymerase, catalase. Show Answer Correct Answer: C) Helicase, DNA polymerase. 22. What century is the year 1080? A) 20th century. B) 11th century. C) 12th century. D) 16th century. Show Answer Correct Answer: B) 11th century. 23. What type of arrow is used to express a strong base? A) $\rightarrow$. B) < . C) <$\rightarrow$. D) None of these. Show Answer Correct Answer: A) $\rightarrow$. 24. What does the Latin root fract mean? A) To say. B) To lead. C) Fracture. D) To break. Show Answer Correct Answer: D) To break. 25. Blue litmus paper turns red whenever reacting with a ..... ? A) Acid. B) Base. C) Neutral. D) Banana. Show Answer Correct Answer: A) Acid. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Bases Quiz 1Class 7 Science Chapter 4 Bases Quiz 2Class 7 Science Chapter 4 Bases Quiz 3Class 7 Science Chapter 4 Bases Quiz 5Class 7 Science Chapter 4 Bases Quiz 6Class 7 Science Chapter 4 Bases Quiz 7Class 7 Science Chapter 4 Bases Quiz 8Class 7 Science Chapter 4 Bases Quiz 9Class 7 Science Chapter 4 Bases Quiz 10Class 7 Science Chapter 4 Bases Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books