CST Practice Time: Cell Biology

1. Biology CSTPractice Time: Cell Biology

2. 1. Compared to a skin cell, a muscle cell is likely to have more — F Golgi bodies G mitochondria H cell membranes J chloroplasts Think about what a muscle cell does…or have to do!

3. 2. A cell with numerous ribosomes is probably specialized for — F enzyme storage G energy production H cell division J protein synthesis

4. 3. Which of the following organelles is present in both prokaryotes and eukaryotes? A Nucleus B Ribosome C Golgi body D Endoplasmic reticulum

5. 4. In the cell membrane model shown below, the molecules which move large molecules into and out of the cell are known as — A cholesterol B proteins C lipids D carbohydrates

6. 5. The eukaryotic organism described above should be classified as — A an animal B a bacterium C a fungus D a plant

7. 6. An important difference between viruses and living cells is that viruses — A cannot reproduce outside of cells B contain more nuclei than cells C cannot mutate but cellscan D need an energy sourcebut cells do not

8. 7. Some organelles have their own DNA that is distinct from the cell’s nuclear DNA. This is true of which organelle? A cell wall B mitochondrion C plasma membrane D vacuole

9. 8. Protein synthesis occurs at which of the structures shown below?

10. 9. Which cell process will move substances against a concentration gradient? A diffusion B facilitated diffusion C osmosis D active transport

11. 10. Which of the following is a main function of structure 5? A. to store carbohydrates for later use B. to give the cell a rigid structure C. to package proteins for export D. to carry out photosynthesis