GCSE Biology Cell Biology Flashcards
6 cards from real GCSE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 GCSE Biology Cell Biology flashcards as text
Which of these is an example of active transport?
Answer: Root hair cells absorbing mineral ions from dilute soil water
Mineral ions are absorbed by root hairs against their concentration gradient using energy.
During which stage of the cell cycle do the chromosomes get pulled to opposite ends of the cell?
Answer: Mitosis
In mitosis, one set of chromosomes is pulled to each end of the cell before it divides.
What is a stem cell?
Answer: An undifferentiated cell that can divide to produce many more cells of the same type or differentiate into specialised cells
Stem cells are undifferentiated cells capable of dividing and becoming specialised.
Which adaptation of a sperm cell helps it to swim to the egg?
Answer: A tail (flagellum)
The tail allows the sperm cell to swim towards the egg.
Which of the following correctly describes diffusion?
Answer: The net movement of particles from an area of higher concentration to an area of lower concentration
Diffusion is the spreading out of particles from high to low concentration.
Why do multicellular organisms need exchange surfaces and transport systems?
Answer: Because they have a small surface area to volume ratio, so diffusion alone is too slow
Large organisms have a small surface area to volume ratio, so diffusion is insufficient.