15 free questions from the CinnaEntry HESI A2 biology bank (311 in the app). Tap an answer to check it. The rationale opens right away.
The basic unit of structure and function in all living things is the:
Answer: A. Cell
Levels of organization: cell → tissue → organ → organ system → organism. The cell is the smallest unit that is itself alive.
The process of copying DNA into messenger RNA is called:
Answer: B. Transcription
Transcription copies a DNA gene into mRNA in the nucleus; translation then builds the protein.
The greatest amount of available energy in a food chain is at the level of the:
Answer: B. Producers
Producers hold the most energy; energy decreases at each higher level.
The final step of a scientific investigation is usually to:
Answer: B. Communicate the results
After analyzing data and drawing conclusions, scientists communicate their results.
Plant cells have a rigid outer structure that animal cells lack, called the:
Answer: B. Cell wall
Plant cells have a cell wall (of cellulose) for support; animal cells have only a cell membrane.
A conclusion drawn from an experiment should be based on the:
Answer: B. Data and results
Conclusions must be supported by the data collected, not opinion.
Active transport differs from passive transport because it:
Answer: A. Requires energy (ATP)
Passive moves down the gradient for free; active moves UP the gradient and must pay in ATP. The sodium-potassium pump is the standard example.
Which term describes all the members of one species living in an area?
Answer: B. Population
A population is all the individuals of a single species in one area.
The genetic information for making a specific protein is carried by a:
Answer: A. Gene
Nesting order: nucleus contains chromosomes, chromosomes contain genes, genes code for proteins.
A cell that has a true, membrane-bound nucleus is called:
Answer: B. Eukaryotic
Eukaryotic cells (plant, animal, fungi) contain a true nucleus enclosed by a membrane.
Beginning at Kingdom, which is the correct order from broadest to narrowest?
Answer: A. Kingdom, Phylum, Class, Order, Family, Genus, Species
Kingdom, Phylum, Class, Order, Family, Genus, Species. Modern classification adds Domain above Kingdom as the broadest level of all, so the full sequence is Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species. Use any sentence whose initials match — inventing your own makes it stick.
During which phase of mitosis do chromosomes line up along the cell's equator?
Answer: A. Metaphase
The first letters carry the meaning: Metaphase-Middle, Anaphase-Apart, Telophase-Two. That mnemonic fixes the whole sequence.
A species with very few members remaining is considered:
Answer: B. Endangered
An endangered species is at risk of extinction due to low numbers.
The best everyday way to prevent the spread of germs is:
Answer: B. Washing your hands
Regular handwashing is one of the most effective ways to reduce germ spread.
The jelly-like fluid that fills a cell and holds the organelles is the:
Answer: B. Cytoplasm
Cytoplasm is the gel-like substance where the organelles are suspended and many reactions occur.
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