40 cell questions

2. What is a cell?

A cell is the smallest structural and functional unit of an organism.

6. Is bacteria a cell?

Bacteria cells are similar to our cells in some ways. Like our cells, bacteria cells have DNA and a plasma membrane. But bacteria are unique in other ways. They are called prokaryotic cells because of these differences.

33. Where can bacteria be found?

Bacteria, can be found on your skin, in the ground, or in all different types of water.

9. What common things are there about prokaryotic and eukaryotic cells?

Both prokaryotic and eukaryotic cells have structures in common. All cells have a plasma membrane, ribosomes, cytoplasm, and DNA.

32. Where are cells found?

Cells are found in all different types of environments, and these environments are constantly changing.

1. Do all cells have the same size and shape?

Cells can differ in shape and sizes. And the different shapes usually means different functions.

18. What is chromosomes?

Chromosomes are strands of DNA wrapped around proteins.

40. When can diffusion start?

Diffusion can occur across a semipermeable membrane, such as the cell membrane, as long as a concentration gradient exists.

38. What is diffusion?

Diffusion is the movement of molecules from an area where there is a higher concentration (larger amount) of the substance to an area where there is a lower concentration (lower amount) of the substance

21. What are the functions of the eukaryotic cells?

Eukaryotic cells have many specific functions, so it can be said that a cell is like a factory.

10. What are some facts about eukaryotic cells?

Eukaryotic cells usually have multiple chromosomes, composed of DNA and protein. Some eukaryotic species have just a few chromosomes, others have close to 100 or more.

17. Whats inside the nucleus?

Inside of the nucleus, you will find the chromosomes.

4. When was the first microscope and who invented it?

It was not until 1665 that English scientist Robert Hooke invented a basic light microscope and observed cells for the first time, by looking at a piece of cork.

3. Can you see cells?

Most cells are so small that you cannot see them without the help of a microscope.

27. What is Photosynthesis?

Photosynthesis converts the sun's solar energy into chemical energy.

29. What a diffrence from plant and animal cells?

Plant cells have a cell wall, while animal cells do not .

26. What are plant cells?

Plant cells have a large central vacuole, are surrounded by a cell wall, and have chloroplasts, which are the organelles of photosynthesis.

30. What is another diffrence?

Plants have several kinds of organelles called plastids.

5. Who developed the hypothesis that cells come from other cells?

Rudolf Virchow developed the hypothesis that cells only come from other cells.

37. Can molecules pass through the plasma membrane?

Small molecules can pass through the plasma membrane through a process called diffusion.

39. What is the amount of a substance in relation to the total volume is the......?

The amount of a substance in relation to the total volume is the concentration.

12. What would happen if a cell dissolved in water, like sugar does?

The cell could not survive in such an environment.

34. What is the cell membrane?

The cell membrane is semipermeable, or selectively permeable, which means that only some molecules can pass through the membrane.

15. What is the function of the plasma membrane?

The function of the plasma membrane is to control what goes in and out of the cell.

20. What is the job of the nucleous?

The job of the nucleolus is to build ribosomes.

8. Whats the diffrence between eukaryotic and prokaryotic cells?

The main difference between eukaryotic and prokaryotic cells is that eukaryotic cells have a nucleus.

22. What is the powerhouse cell?

The mitochondria are the powerhouses of the cell.

16. Where is the nucleus found?

The nucleus is only found in eukaryotic cells.

25. What is the nucleus?

The nucleus of a cell is like a safe containing the factory's trade secrets. The nucleus contains the genetic material (DNA), the information needed to build thousands of proteins.

19. What is in the the nucleus?

The nucleus of many cells also contains a central region called the nucleolus.

13. How many layers does the plasma membrane have?

The plasma membrane is made of a double layer of special lipids, known as phospholipids.

24. What are vacuoles?

The vacuoles are like storage centers. Plant cells have larger vacuoles than animal cells. Plants store water and nutrients in their large central vacuoles.

31. How is a cell membrane like a castle wall?

The walls of a castle, like the cell membrane, are designed to keep out dangerous things.

7. How many basic cells are there?

There are two basic types of cells, prokaryotic cells and eukaryotic cells.

35. Where is water found on the cell?

There is water found on both the inside and the outside of cells.

14. Is there water outside of cells?

There is water outside the cell, and the cytoplasm inside the cell is mostly water as well.

28. What does vacuole hold?

Vacuole holds a mixture of water, nutrients, and wastes.

23. What are vesicles?

Vesicles are small membrane bound sacs that transport materials around the cell and to the cell membrane.

36. When does diffusion start?

When the molecules are evenly spread throughout the space, the water will become an even color.

11. What protects your cells?

Your cells have a plasma membrane that helps to guard your cells from unwanted intruders.