Interphase and division
Before you read
Test yourself first: 5 questions
Question 1 of 5
The hormone that helps regulate sleep, secreted by the pineal gland, is:
Answer: B. Melatonin from the pineal gland helps regulate the sleep–wake cycle.
Question 2 of 5
In the water cycle, precipitation includes rain, sleet, hail, and:
Answer: B. Snow is a form of precipitation, along with rain, sleet, and hail.
Question 3 of 5
During which phase of the cell cycle does a cell grow and copy its DNA?
Answer: A. Interphase is the longest phase, where the cell grows and replicates its DNA before dividing.
Question 4 of 5
Which structure is found in plant cells but NOT in animal cells?
Answer: B. Plant cells have a rigid cell wall (and chloroplasts) that animal cells lack.
Question 5 of 5
A hypertonic solution around a cell causes the cell to:
Answer: B. Water moves out of the cell toward the higher solute concentration outside, so the cell shrinks.
Keep the streak going with more questions like these, each with a full rationale.
