The basic unit of life is the:
Atom
Organelle
Molecule
Cell
The Correct Answer is D
A. Atom: Atoms are the basic chemical building blocks but are not themselves living.
B. Organelle: Organelles are membrane-bound structures within cells that perform specialized tasks but are not independent living units.
C. Molecule: Molecules are chemical combinations of atoms (e.g., proteins, lipids) and are not alive.
D. Cell: The cell is the basic unit of life, capable of metabolism, growth, reproduction, and response to stimuli.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Cell: The cell is the smallest structural and functional living unit of the body capable of independent life processes.
B. Organ: An organ is a collection of tissues performing specific functions and is larger than a cell.
C. System: A system is a higher-level organization of multiple organs working together.
D. Tissue: A tissue is a group of similar cells performing a common function, larger than a single cell.
Correct Answer is C
Explanation
A. Ribosome: Ribosomes synthesize (translate) proteins from mRNA but do not package proteins for export.
B. Nucleolus: The nucleolus is the nuclear region where rRNA is transcribed and ribosomal subunits are assembled, not involved in packaging secreted proteins.
C. Golgi apparatus: The Golgi modifies, sorts, and packages proteins into vesicles for secretion or delivery to other cellular locations.
D. Centriole: Centrioles organize microtubules and play roles in cell division, not in protein packaging.
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