Nokea
Which muscle is the largest in the human body?
- A. Gluteus maximus (buttocks)
- B. Quadriceps femoris (thighs)
- C. Erector spinae (back)
- D. Pectoralis major (chest)
Correct Answer: A
Rationale: The correct answer is A, the gluteus maximus (buttocks). The gluteus maximus is indeed the largest muscle in the human body, located at the back of the hip and stretching from the sacrum to the femur. This muscle is crucial for hip joint extension, playing a significant role in various activities such as walking, running, and climbing stairs. Choices B, C, and D are incorrect. While the quadriceps femoris, erector spinae, and pectoralis major are also important muscles, they are not the largest muscle in the human body.
You may also like to solve these questions
Where in the cell are proteins modified, sorted, and packaged for transport?
- A. Ribosomes
- B. Golgi apparatus
- C. Endoplasmic reticulum (ER)
- D. Lysosomes
Correct Answer: B
Rationale: The Golgi apparatus is the cellular organelle responsible for modifying, sorting, and packaging proteins for transport within the cell or for secretion outside the cell. Ribosomes are not involved in modifying, sorting, or packaging proteins; they are responsible for protein synthesis. The endoplasmic reticulum (ER) is primarily involved in protein synthesis and folding, rather than modification and packaging for transport. Lysosomes function in breaking down cellular waste rather than modifying, sorting, or packaging proteins for transport.
Two identical balls, one made of clay and the other made of steel, are dropped from the same height. Which ball reaches the ground first, neglecting air resistance?
- A. The clay ball due to its lower density
- B. The steel ball due to its higher density
- C. Both balls reach the ground simultaneously
- D. It depends on the initial velocities of the balls
Correct Answer: C
Rationale: In the absence of air resistance, both balls will experience the same acceleration due to gravity (9.8 m/s^2) regardless of their densities or materials. This means that both balls will reach the ground at the same time, assuming they are dropped from the same height simultaneously. The differences in density or material composition do not affect the rate at which objects fall in a vacuum. Therefore, both the clay and steel balls, being identical in shape and starting position, will have the same free-fall acceleration and will hit the ground simultaneously. Choices A and B are incorrect because the density of the materials does not impact the time it takes for objects to fall under gravity alone. Choice D is incorrect as the initial velocities do not play a role in the time taken to fall in a vacuum, where only the acceleration due to gravity affects the motion.
What is the difference between type 1 and type 2 diabetes, both related to insulin and blood sugar?
- A. Type 1 is caused by insulin resistance, type 2 by insulin deficiency.
- B. Type 1 is temporary, type 2 is permanent.
- C. Type 1 affects adults, type 2 affects children.
- D. Type 1 is treated with diet only, type 2 requires medication.
Correct Answer: A
Rationale: The correct difference between type 1 and type 2 diabetes lies in their underlying causes. Type 1 diabetes is caused by the body's inability to produce insulin, while type 2 diabetes is characterized by insulin resistance, where the body doesn't effectively use the insulin it produces. Insulin resistance is a key feature of type 2 diabetes, distinguishing it from type 1 where insulin deficiency is the primary issue. Choices B, C, and D are incorrect. Type 1 and type 2 diabetes can both be chronic conditions, affecting individuals of different age groups, and typically require a combination of diet, exercise, and medication for management.
Which enzyme plays a crucial role in DNA replication during the S phase of interphase?
- A. Helicase
- B. DNA polymerase
- C. Ligase
- D. Topoisomerase
Correct Answer: B
Rationale: During the S phase of interphase, DNA replication takes place. DNA polymerase is the enzyme responsible for synthesizing new DNA strands by adding nucleotides in a complementary manner to the template strand. It plays a pivotal role in accurately replicating the entire genome. While helicase unwinds the double-stranded DNA for replication, topoisomerase relieves the tension in the DNA strands, and ligase joins the Okazaki fragments on the lagging strand. However, DNA polymerase directly participates in the synthesis of new DNA strands during replication, making it the correct answer.
What is the process by which the body reabsorbs water from the large intestine?
- A. Dehydration
- B. Osmosis
- C. Filtration
- D. Secretion
Correct Answer: B
Rationale: Osmosis (Option B) is the correct process by which the body reabsorbs water from the large intestine. Osmosis is the movement of water across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration. In the large intestine, water is reabsorbed through osmosis to maintain the body's fluid balance. Dehydration (Option A) refers to the condition of having insufficient water in the body, not the process of water reabsorption in the large intestine. Filtration (Option C) is a process where a liquid or gas passes through a filter to separate the components, not the primary mechanism for water reabsorption in the large intestine. Secretion (Option D) is the release of substances from cells, but it is not the process by which the body reabsorbs water from the large intestine.