A. Mitochondria
B. Lysosomes
C. Centrosomes
D. Ribosomes
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Lysosomes are membrane-bound organelles that contain lysozymes that are responsible for breaking down waste materials and cellular debris through intracellular digestion. This process helps maintain cellular health and homeostasis by recycling and degrading cellular components.
Therefore, the Correct Answer is B.
Which of the following would result in an increase in the chemical reaction?
A. Adding more of the product
B. Decreasing the concentration of the reactant
C. Sealing the reaction in an airtight container
D. Using a mortar and pestle to grind a solid reactant to a powder
The Correct Answer is D.Crushing a solid reactant into powder increases the surface area of the reactant, thereby increasing chemical reaction. This is because more of the reacting molecules or ions are exposed to the other reactant, which increases the chance of particles colliding and leads to more successful collisions per second.
The vermiform appendix extends from the region of the large intestine known as which of the following?
A. jejunum
B. Rectum
C. Cecum
D. Achi
The Correct Answer is C.The vermiform appendix is a small, finger-like projection that extends from the cecum, which is the first part of the large intestine.
Which of the following characteristics of water helps explain why coastal areas experience less dramatic temperature changes during the day?
A. Water has a high specific heat capacity
B. Water is a versatile solvent
C. Water forms covalent bonds with other water molecules
D. Water's adhesive properties prevent evaporation
The Correct Answer is A.Water has a high specific heat capacity, which means it can absorb and store a large amount of heat energy without significantly changing in temperature. This helps moderate the temperature fluctuations of the air near the coast, as water can store heat during the day and release it at night, or vice versa.
In order to determine the effects of energy drinks on women's running speed, researchers gave 300 women an energy drink and then recorded the time it took each of them to run 2 miles. After collecting the results, researchers concluded that energy drinks increase the speed of running in
Which of the following further tests would best help to support this conclusion?
A. Repeat the same experiment, using 300 men
B. Repeat the experiment giving half of the women water and the other half the energy drink
C. Repeat the experiment giving the women two different energy drinks
D. Repeat the experiment, having half of the women run 2 miles and the other half run 5 miles
The Correct Answer is B.Conducting the experiment with half the women taking water and the other half taking an energy drink creates a study and experimental group, which can allow for comparison and conclusion. The researchers can compare the effects of the energy drink directly with a baseline, and this helps to establish a cause-and-effect relationship and provides stronger evidence to support their conclusion.
A represents atomic mass and 2 represents an atomic number, which of the following describes an atom after a proton is emitted?
A. A-1,2-1
B. A-1,2+1
C. A,2-1
D. A+1,2-1
The Correct Answer is A.This is because when a proton is emitted from an atom, the atomic mass decreases by one unit, and the atomic number decreases by one unit. The atomic mass is the sum of protons and neutrons in the nucleus, and the atomic number is the number of protons in the nucleus. Therefore, if a proton is lost, both numbers decrease by one.
Which of the following body systems breaks down proteins into amino acids?
A. Digestive
B. Excretory
C. Circulatory
D. Endocrine
The Correct Answer is A.The digestive system breaks down complex food substances into small and less complex absorbable compounds. Proteins, for instance, are broken down to constituent amino acids through a digestion process that combines mastication and enzymatic breakdown.
Which of the following atoms is most likely to become a cation?
A. Oxygen, atomic number 8
B. Fluorine, atomic number 19
C. Helium, atomic number 2
D. Fluorine, atomic number 9
The Correct Answer is D.Fluorine has a high electronegativity, and therefore, it has a strong attraction for electrons and tends to gain electrons to form anions. Therefore, it is more likely to become a cation by losing an electron.
The hip is an example of which of the following type of joints?
A. Ball-and-socket
B. Pivot
C. Gliding
D. Hinge
The Correct Answer is A.The hip joint is an example of a ball-and-socket joint. The hip joint is formed by the articulation of the head of the femur with the acetabulum of the pelvis. The rounded head of the femur (ball) fits into the cup-shaped acetabulum (socket), allowing for a wide range of motion in multiple planes.
Which of the following substances is excreted by sweat glands in response to the breakdown of proteins and the formation of ammonia?
A. Sebum
B. Water
C. Lysozymes
D. Urea
The Correct Answer is D.Urea is a nitrogenous waste product that is produced when the liver breaks down proteins and amino acids. It is then excreted from the body via sweat.
A study found two processes. Process A and Process B, are to be correlated.
Which of the following is true for these processes?
A. The study indicates that Process A causes Process B
B. The study cannot indicate whether Process A and B have a negative relationship
C. The study does not indicate a causal relationship between the processes.
D. The study cannot indicate whether Process A and B have a positive relationship
The Correct Answer is C.Correlation does not imply causation. Even if two processes are found to be correlated, it does not necessarily mean that one causes the other. It could be that they are both influenced by a third factor, or the correlation could be coincidental. Therefore, the study does not indicate a causal relationship between the processes.