PAX Biology Flashcards

6 cards from real PAX practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 PAX Biology flashcards as text

What is the basic unit of life?
Answer: Cell
The cell is the smallest structural and functional unit of all living organisms.
Which macromolecule serves as the primary energy source for the body?
Answer: Carbohydrates
Carbohydrates are the body's preferred and most readily available source of energy.
What does the term 'homeostasis' refer to?
Answer: The body's maintenance of a stable internal environment
Homeostasis is the process by which the body maintains a stable internal environment (e.g., temperature, pH, glucose levels) despite external changes.
Which molecule carries genetic information from the nucleus to the ribosome?
Answer: mRNA
Messenger RNA (mRNA) carries the genetic code from DNA in the nucleus to the ribosomes where proteins are synthesized.
The human body has how many pairs of chromosomes?
Answer: 23
Humans have 23 pairs of chromosomes (46 total), with one chromosome in each pair inherited from each parent.
Which organ produces insulin?
Answer: Pancreas
The pancreas produces insulin from beta cells in the islets of Langerhans to regulate blood glucose levels.

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