Nokea
What is the role of bile in digestion?
- A. To break down carbohydrates
- B. To emulsify fats
- C. To neutralize stomach acid
- D. To absorb proteins
Correct Answer: B
Rationale: Bile emulsifies fats, breaking them down into smaller droplets for easier digestion.
You may also like to solve these questions
How many molecules of NADPH and ATP are required to reduce 6 molecules of CO2 to glucose via photosynthesis?
- A. 6 NADPH and 9 ATP
- B. 12 NADPH and 18 ATP
- C. 18 NADPH and 24 ATP
- D. 24 NADPH and 36 ATP
Correct Answer: B
Rationale: During photosynthesis, 12 molecules of NADPH and 18 molecules of ATP are required to reduce 6 molecules of CO2 to glucose. NADPH and ATP are essential energy carriers in the process of photosynthesis. Choice A is incorrect because it underestimates the required molecules of both NADPH and ATP. Choices C and D overestimate the number of molecules needed, making them incorrect answers.
Which element is essential for the formation of hemoglobin?
- A. Calcium
- B. Iron
- C. Potassium
- D. Sodium
Correct Answer: B
Rationale: The correct answer is Iron. Iron is essential for the formation of hemoglobin, the protein in red blood cells that binds and transports oxygen throughout the body. Calcium (Choice A), Potassium (Choice C), and Sodium (Choice D) are not directly involved in the formation of hemoglobin and its oxygen-carrying function.
What is the function of the Vas Deferens?
- A. Produces fluid to increase sperm mobility
- B. Site where the egg matures
- C. Helps control urine flow
- D. Connects each testis to the urethra
Correct Answer: D
Rationale: The vas deferens is a duct that connects each testis to the urethra, allowing the transport of sperm.
Choice A is incorrect because the vas deferens does not produce fluid to increase sperm mobility.
Choice B is incorrect as the vas deferens is not a site for egg maturation.
Choice C is incorrect as the vas deferens does not help control urine flow, its primary role is in the transport of sperm.
Which of the following is not a biological macromolecule?
- A. Glycoproteins
- B. DNA
- C. Phospholipid
- D. Glucose
Correct Answer: D
Rationale: Glucose is a monosaccharide, which is a simple sugar and not a macromolecule. Glycoproteins, DNA, and phospholipids are all examples of biological macromolecules. Glycoproteins are proteins covalently bonded to carbohydrates, DNA is a nucleic acid, and phospholipids are lipids that contain a phosphate group.
What is the role of platelets in the blood?
- A. Transport oxygen
- B. Fight infection
- C. Produce antibodies
- D. Clot blood
Correct Answer: D
Rationale: Platelets play a crucial role in blood clotting by forming clots to help stop bleeding. While red blood cells transport oxygen, white blood cells fight infection, and immune cells produce antibodies, platelets specifically function to prevent excessive bleeding by forming clots. Therefore, the correct answer is D. Choices A, B, and C are incorrect as they describe functions of other components of the blood, not platelets.