This quiz works best with JavaScript enabled. Home > Agriculture > Biochemistry > General > Biochemistry – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 20 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which organelles that has a series of flattened membranes, involved in secretion proteins from cells and in reactions that link sugar to other cellular components? A) Golgi apparatus. B) Mitochondria. C) Endoplasmic reticulum. D) Peroxisomes. Show Answer Correct Answer: A) Golgi apparatus. 2. Fats & oils are examples of this type of macromolecule A) Nucleic Acids. B) Lipids. C) Proteins. D) Carbohydrates. Show Answer Correct Answer: B) Lipids. 3. CPS-I is used in which pathway: A) Pyrimidine synthesis. B) Purine synthesis. C) TCA cycle. D) Urea cycle. Show Answer Correct Answer: D) Urea cycle. 4. Which 4 elements make up most of all living matter? A) Carbon, Hydrogen, Calcium, Nitrogen. B) Carbon, Oxygen, Nitrogen, Sulfur. C) Carbon, Hydrogen, Nitrogen, Oxygen. D) Carbon, Oxygen, Sodium, Potassium. Show Answer Correct Answer: C) Carbon, Hydrogen, Nitrogen, Oxygen. 5. The element ..... is found in all of the organic compounds. A) Oxygen. B) Carbon. C) Iron. D) Nitrogen. Show Answer Correct Answer: B) Carbon. 6. Which suffix is used in the names of most enzymes? A) -yme. B) -gen. C) -nic. D) -ase. Show Answer Correct Answer: D) -ase. 7. PH of coffee is considered as A) Basic. B) Neutral. C) Acidic. D) None of the above. Show Answer Correct Answer: C) Acidic. 8. These organic molecules are used by the body to store and release energy. A) Proteins. B) Lipids. C) Nucleic Acids. D) Carbohydrates. Show Answer Correct Answer: D) Carbohydrates. 9. The function of lipids is to ..... A) Main source of energy & provide structural support. B) Store energy, provide and steroids. C) Transport substances, speed up reactions, provide support, fight disease, regulate cell processes, and provide hormones. D) Stores, transmits, & communicates genetic information. Show Answer Correct Answer: B) Store energy, provide and steroids. 10. Which polysaccharides are found in plants only? A) Glycogen and chitin. B) Glycogen and cellulose. C) Starch and cellulose. D) Chitin and starch. Show Answer Correct Answer: C) Starch and cellulose. 11. Which best explains enzyme specificity? A) An enzyme reacts best at a certain temperature. B) An enzyme reacts best at a certain pH. C) An enzyme is able to react with many different substrates. D) An enzyme is able to react with only one substrate. Show Answer Correct Answer: D) An enzyme is able to react with only one substrate. 12. What is the location in the cell for transcription? A) Nucleus. B) Ribosome. C) Cytoplasm. D) Mitochondria. Show Answer Correct Answer: A) Nucleus. 13. The particles that are found in the nucleus of an atom are ..... A) Neutrons and electrons. B) Electrons only. C) Protons and neutrons. D) Protons and electrons. Show Answer Correct Answer: C) Protons and neutrons. 14. Acquisition of Nitrogen form the atmosphere requires breaking of ..... bond. A) Triple bond. B) Single bond. C) Hydrogen bond. D) Double bond. Show Answer Correct Answer: A) Triple bond. 15. Fats, oils, and waxes are examples of: A) Carbohydrates. B) Nucleic acids. C) Proteins. D) Lipids. Show Answer Correct Answer: D) Lipids. 16. All enzymes end in -ase. Which means that lactose (a carb) is broken down by which enzyme? A) Lactase. B) Sucrase. C) Fructase. D) Galactase. Show Answer Correct Answer: A) Lactase. 17. Which of the following is true regarding lipids? A) 2nd energy source. B) Padding & protection. C) Keeps you warm. D) All of the above. Show Answer Correct Answer: D) All of the above. 18. DNA & RNA are composed of what two general types of molecules? A) Purines & pyrimidines. B) Protactids & peroxides. C) Phosphotines and puradines. D) Pantomimes & pastelines. Show Answer Correct Answer: A) Purines & pyrimidines. 19. All organic compounds contain the element ....., but inorganic compounds do not have it. A) Phosphorous. B) Sulfur. C) Nitrogen. D) Carbon. Show Answer Correct Answer: D) Carbon. 20. This type of fat comes from animals and is often solid at room temperature. A) Unsaturated fat. B) Saturated fat. C) Transfat. D) Phospholipid. Show Answer Correct Answer: B) Saturated fat. 21. Phospholipid tails face ....., while the heads face ..... A) Up, down. B) Left, right. C) The water, the center. D) The center, the water. Show Answer Correct Answer: D) The center, the water. 22. What are the main atoms of a protein molecule? A) Carbon, hydrogen, nitrogen, and oxygen. B) Nitrogen, oxygen, and phosphorous. C) Oxygen, sulfur, and nitrogen. D) Carbon, phosphorous, and hydrogen. Show Answer Correct Answer: A) Carbon, hydrogen, nitrogen, and oxygen. 23. Water is polar because ..... A) The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. B) The molecule has two poles, at which the it is colder than other regions of the molecule. C) The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom. D) The water molecule is neutral. Show Answer Correct Answer: A) The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. 24. Lactose is made up of D-galactose and one unit of D-glucose joined by a ..... glycosidic bond. A) A-1, 2. B) B-1, 2. C) B-1, 4. D) A-1, 4. Show Answer Correct Answer: C) B-1, 4. 25. It is the inactive portion of an enzymes? A) Co-Enzymes. B) Holoenzymes. C) Metal Ions. D) Apoenzymes. Show Answer Correct Answer: D) Apoenzymes. 26. Where does glycolysis take place in cells? A) Mitochondrion. B) Cytoplasm. C) Endoplasmic Reticulum. D) Ribosomes. Show Answer Correct Answer: B) Cytoplasm. 27. Which statement is true about carbohydrates? A) Carbohydrates are a major component of the cell membrane. B) Carbohydrates form enzymes - biological catalysts. C) Carbohydrates carry the genetic information in plants. D) Carbohydrates are a source of energy. Show Answer Correct Answer: D) Carbohydrates are a source of energy. 28. What are the monomers of carbohydrates? A) Nucleotides. B) Monosaccahrides. C) Amino acids. D) Triglycerides. Show Answer Correct Answer: B) Monosaccahrides. 29. Water is attracted to the sides of a glass tube due to which of its properties? A) Universal Solvency. B) Heat Capacity. C) Cohesion. D) Adhesion. Show Answer Correct Answer: D) Adhesion. 30. Which sugars are best providing consistent energy over time? A) Monosaccharides. B) Disaccharides. C) Polysaccharides. D) None of above. Show Answer Correct Answer: C) Polysaccharides. ← PreviousNext →Related QuizzesBiochemistry QuizzesAgriculture QuizzesBiochemistry Quiz 1Biochemistry Quiz 2Biochemistry Quiz 3Biochemistry Quiz 4Biochemistry Quiz 5Biochemistry Quiz 6Biochemistry Quiz 7Biochemistry Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books