What is apoptosis?
Mutation
Cell migration
Cell division
Programmed cell death
The Correct Answer is D
A. Mutation: A change in the DNA sequence of a gene, not the regulated process of cell death.
B. Cell migration: Movement of cells from one location to another during development or repair, not a form of programmed death.
C. Cell division: The process by which a cell replicates and splits (mitosis/cytokinesis), the opposite of cell elimination.
D. Programmed cell death: Apoptosis is an orderly, regulated process involving caspases, cell shrinkage, membrane blebbing, and DNA fragmentation that eliminates cells without provoking inflammation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Only eukaryotes: The microbiome includes many prokaryotes and viruses as well as eukaryotic microbes, so it is not limited to eukaryotes.
B. Only prokaryotes: Prokaryotes (bacteria, archaea) are major components, but the microbiome also contains viruses and fungi.
C. Bacteria, archaea, viruses, and fungi: The human microbiome is composed of diverse microorganisms including bacteria, archaea, viruses, and fungal species.
D. Only bacteria: Bacteria are abundant, but this option omits other microbial groups present in the microbiome.
Correct Answer is A
Explanation
A. Carbohydrate: Carbohydrates (especially glucose) are the primary and most readily used fuel for many cellular processes.
B. Protein: Proteins can be used for energy in starvation or specific metabolic states, but their main roles are structural and functional (enzymes, transport, signalling).
C. Lipid: Lipids are dense energy stores and important in membranes, but carbohydrates are typically the main immediate energy source.
D. Nucleic acid: Nucleic acids store genetic information and are not a principal energy source for routine cellular metabolism.
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