Question
Which of the following processes directly engages in anabolic reactions?
A. Active transport of ions
B. Liberation of energy from glucose
C. Synthesis of intracellular enzymes
D. Degradation of worn-out cell organelles by lysosomes
Answer/Explanation
Ans: C
Question
What accounts for the contrast in image quality between the light microscope (left) and the scanning electron microscope (right) images of the radiolarian?
A. Specimens do not permit the passage of light.
B. Electron microscopy allows for greater magnification.
C. The electron microscope exhibits superior resolution.
D. Methylene blue staining is applied to samples viewed through the light microscope.
Answer/Explanation
Ans: C
Question
What clarifies the alterations observed in an osmosis experiment where red blood cells were submerged in a salt solution for two hours?
A. The salt solution being hypertonic, causing entry into the red blood cells.
B. The salt solution being hypotonic, leading to disruption of red blood cell membranes.
C. The salt solution being hypertonic, resulting in water movement from red blood cells.
D. The salt solution being hypotonic, causing loss of mineral salts from red blood cells.
Answer/Explanation
Ans: C
Question
What provides evidence opposing the spontaneous generation theory in the experiment where two swan-necked flasks were used, one with boiled broth and the other with unboiled broth, left in the laboratory for a week?
A. Microorganisms perished in flask F due to elevated temperatures.
B. No microorganisms proliferated in either flask.
C. Flask G exhibited the growth of microorganisms.
D. Flask F displayed an absence of microorganisms, while flask G had numerous growths.
Answer/Explanation
Ans: D
Question
How does cisplatin impede the division of cancer cells during mitosis by affecting processes in stage S of interphase?
A. It impedes the replication of DNA.
B. It hinders the development of spindle fibers.
C. It obstructs the breakdown of the nuclear membrane.
D. It obstructs the condensation of chromosomes.
Answer/Explanation
Ans: A