BIOLOGY
Which cell structure is common to plant and animal cells?
A. chloroplast
B. lysosome
C. ribosome
D. centriole
C. ribosome
Which scientist proposed an atomic model in which electrons occupy specific energy levels and emit light when they move from higher to lower energy levels?
A. John Dalton
B. Ernest Rutherford
C. Niels Bohr
D. J. J. Thomson
Answer: C. Niels Bohr
Which theory states that the universe began from an extremely hot and dense state and has been expanding ever since?
Answer: The Big Bang Theory
Two forces act on a box: 20 N to the right and 8 N to the left. What is the net force?
A. 28 N to the right
B. 12 N to the right
C. 12 N to the left
D. 28 N to the left
Answer: B. 12 N to the right
A cell has 12 chromosomes at metaphase. Assuming normal mitosis and no chromosome abnormalities, how many chromosomes will each daughter nucleus contain after mitosis is completed?
12 chromosomes
Which of the following is an example of an exothermic chemical reaction?
A. The combustion of wood
B. The thermal decomposition of calcium carbonate
C. The melting of ice
D. The photosynthesis of plants
Answer: A. The combustion of wood
Which evidence of the Big Bang Theory is the faint radiation left over from the early universe, now detected as microwave radiation throughout space, supporting the idea that the universe has expanded and cooled over time?
A. Galactic Redshift
B. Hubble’s Law
C. Cosmic Microwave Background Radiation
D. Stellar Parallax
Answer: C. Cosmic Microwave Background Radiation
Why does violet light bend more than red light when passing through a glass prism?
A. Longer wavelength, faster speed
B. Shorter wavelength, higher refractive index
C. Lower frequency, greater absorption
D. Lower energy, greater reflection
Answer: B. Shorter wavelength, higher refractive index
What are the tiny pores on the surface of leaves that facilitate gas exchange during photosynthesis, allowing carbon dioxide to enter and oxygen to exit?
stomata
Which set of quantum numbers describes the principal energy level, subshell, orbital orientation, and electron spin of an electron in an atom?
A.p, n, e, A
B. n, l, mₗ, mₛ
C. m, V, T, P
D. Z, A, p, n
Answer: B. n, l, mₗ, mₛ
What is the name of a region around a star where conditions may allow liquid water to exist on a planet’s surface?
ANSWER: The habitable zone
Two plane mirrors are placed at an angle to each other. If 11 images of an object are formed, what is the angle between the mirrors?
A. 18°
B. 30°
C. 36°
D. 45°
Answer: B. 30°
What molecule serves as the final electron acceptor in the electron transport chain during aerobic respiration?
Oxygen
In a phase diagram, what is the term for the specific temperature and pressure at which a substance’s solid, liquid, and gas phases coexist in equilibrium?
A. Melting point
B. Critical point
C. Triple point
D. Freezing point
Answer: C. Triple point
What do you call the climate phenomenon that involves usually warm sea-surface temperatures in the central and eastern equatorial Pacific and can alter rainfall patterns in the Philippines?
ANSWER: El Niño
14. An object has an initial velocity of 6 m/s and accelerates at 2 m/s² for 4 s. What is its final velocity?
A. 8 m/s
B. 10 m/s
C. 14 m/s
D. 16 m/s
Answer: C. 14 m/s