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Cells
Cells- CSCC
| Question | Answer |
|---|---|
| Robert Hooke first described cells by looking at thin slices of | cork |
| What limits cell size? | A)Surface-to-volume ratio. B)Speed of movement of materials from the middle to the periphery of the cell C)The bigger the cell, the less access there is from the exterior of the cell to the inside of the cell. D)All of the above limit cell size. |
| Which of the following structures contain microtubules? | cilia,flagella & centrioles |
| Chromosomes A) are located in the nucleus. B) contain DNA. C) are only visible at certain times with a light microscope. D) all of the above characterize chromosomes | D) all of the above characterize chromosomes |
| The smooth endoplasmic reticulum ________________. | synthesizes carbohydrates and lipids |
| The net movement of molecules down a concentration gradient is | diffusion |
| Which of the following can move freely across a plasma membrane? | water |
| A red blood cell placed in pure water will burst because A) osmotic pressure increases inside the cell. B) the solution surrounding the cell is hypotonic. C) the cell is hypertonic. D) all of the above | D) all of the above |
| Which one of the following terms is not related to a substance entering a cell? | exocytosis |
| Movement of molecules through channels in the plasma membrane in only one direction by the expenditure of energy is | active transport |
| Lysosomes recycle and digest worn out cell components. A) True B) False | True |
| The Golgi complex synthesizes proteins.A) True B) False | False |
| Energy for the cell is generated by the mitochondrion. A) True B) False | True |
| Chloroplasts are found only in plants. A) True B) False | False |
| Cell vacuoles are comprised of empty space. A) True B) False | False |
| Cell walls in plants are composed of cellulose. A) True B) False | True |
| The chemical reactions of photosynthesis occur on the membranes of the mitochondrion. A) True B) False | False |
| Cell membranes are composed of a delicate protein sheet. A) True B) False | False |
| There are 2 major kinds of cells: prokaryotes and eukaryotes. A) True B) false | True |
| Diffusion is the movement of water molecules across a semi-permeable membrane which continues until equilibrium has been reached. A) True B) False | False |
| Cell theory includes the principle that | cells are the smallest living things. Nothing smaller than a cell is considered alive. |
| The plasma membrane | is a double lipid layer with proteins inserted in it, which surrounds every cell individually. |
| Organisms that have cells with a relatively uniform cytoplasm and no organelles are called ______________, and organisms whose cells have organelles and a nucleus are called ______________. | prokaryotes, eukaryotes |
| Within the nucleus of a cell you can find | a nucleolus |
| The endomembrane system within a cell includes | the endoplasmic reticulum and the Golgi complex |
| Until fairly recently it was thought that only the nucleus of each cell contained DNA. We now know that DNA is also carried in the | the mitochondria and the chloroplasts |
| Which of the following statements is true? | Eukaryotic cells in plants and fungi, and all prokaryotes, have a cell wall |
| If you put a drop of food coloring into a glass of water, the drop of color will | slowly disperse throughout the water; this is because of diffusion |
| When large molecules such as food particles need to get into a cell, they cannot easily pass through the plasma membrane and so they move across the membrane through the processes of | endocytosis and phagocytosis |
| Active transport of certain molecules involves | energy and specialized pumps or channels |
Created by:
Bonnie870