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Cells
| Question | Answer |
|---|---|
| Who used a compound microscope to see chamber within cork and named them cells? | Robert Hooke |
| What advance in technology made the discovery of cells possible? | the microscope |
| Which of the following is not a principle of the cell theory? | very few cells are abble to reproduce |
| Which of these is not true of cells | They are much like empty rooms. |
| Electron microscopes can reveal details | 1000 times smaller than those visible in light microscopes |
| Which type of microscope can produce three-dimensional images of a cell of a cell surface? | scanning electron microscope |
| Colors seen in images made from electron microscopes are | add to make certain structures easier to see |
| Looking at a cell under a microscope, you note that it is a prokaryote. How do you know | The cell lacks a nucleus |
| Which of the following enclose their DNA in a nucleus | eukaryotes |
| Not all cells ar a like. Which of the following is not a true statement about differences between cells | most cells have a membrane, but some do not. |
| Which of the following organisms are prokaryotes | bacteria |
| Which of hte following conclusions could you draw about the cell shown | the cell is a eukaryotic because it has a nucleus |
| Which of the following is a function of the nucleus | stores DNA |
| which of the following best describes the relationship between the nucleus and the cytoplasm | the nucleus is an organelle that is surrounded by the cytoplasm |
| Which of the following statements about the nucleus is not true | The nucleus is the site of protein assembly |
| Which organelle breaks down organelles that are no longer useful | lysosome |
| Which of the following is a function of the cytoskeleton | helps a cell keep its shape |
| Which structures are involved in cell movement | microtubules and microfilaments |
| -Which structure in the cell shown in fig above store materials, such as water, salts, proteins, and carbohydrates | C |
| Which stucture make proteins using coded instructions that come from the nucleus | ribosomes |
| Which sequence correctly traces the path of a protein in the celll | ribosomes, endoplasmic reticulum, Golgi apparatus |
| Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use | mitochondrian |
| which organelles are involved in energy conversion | mitochondria and chloroplasts |
| Which organelle would you expec to find in plant cells but not animals cells | chloroplast |
| the primary function of the cell wall is to | support and protect the cell |
| unlike the cell membrane, the cell wall is | a ridid structure |
| You will not find a cell wall in which of these kinds of organisms | animals |
| Which of the following structures servenas the cell's boundary from its environment | cell membranes |
| Which of the following is a function of the cell membrane | regulates the movement of materials into and out of the cell |
| The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of | proteins |
| Diffusion occurs because | molecules constantly move and collide with each other |
| Which organelle would you expect to find in a plant cells but not animal cells | chloroplast |
| The primary function of the cell wall is | to support and protect the cell |
| Unlike the cell membrane, the cell wall is | a rigid sturcture |
| You will not find a cell wall in which of these kinds of organisms | animals |
| which of the following structures serves as the cells boundary from its environment | cell membrane |
| During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will | continue to move across the membrane to the inside of the cell |
| The diffusion of wate across a selectively permeable membrane is called | osmosis |
| an animal cell that is surrounded by fresh water will burst because the osmotic pressure causes | water to move into the cell |
| Which means of particle transport requires input of energy from the cell | active transport |
| --Which means of particle transport is shown in Fig 7-4 | active transport |
| Which means of particle transport is shown in fig 7-5 | endocytosis |
| Which of the following activities is not a way that unicellular organisms maintain homeostasis | cell specialization |
| Which term describes the relatively constant internal physcial conditions of an organism | homeostasis |
| The cells of unicellular organisms are | able to carry out all of the functions necessary for life |
| Which of the following is an example of an organ | heart |
| A group of similar cells that perform a particular function is called | a tissue |
| An organ system is a group of organs | that work together to perform a specific function |
| Which list represents the levels of organization in a multicellular organism from the simplest level to the most complex level | cell, tissue, organ, organ system |
| Viruses are not madee up of cells. Therefore, viruses are not considered to be living things | True |
| A scanning electron microscope allows light to pass through a specimen and focuses it using two lenses to form an image. | false |
| Prokaaryotic and eukaryotic cells are surrounded by a thin, flexible barrier called a cell membrane | True |
| The assembly of ribosomes begins in a small dose structure called the chromatin | False |
| Flagella made up of microtubules help organize cell division | False |
| Cilia and flagella are made of protein filaments called endoplasmic reticulum | False |
| Structure D represented in Fig 7-6 is the smooth endoplasmic reticulum | False |
| Ribosomes that synthesize proteins are found on the smooth endoplasmic reticulum | False |
| Ribosomes that synthesize proteins are found on the smooth endoplasmic reticulum | False |
| Plant cells have chloroplasts but not mitochondria | False |
| Water, carbon dioxide, oxygen, and some other substances can pass through the cell wall | True |
| Once equilibrium is reached, roughly equal numbers of molecules move in either direction across a semipermeable membrane, and there is no further change in concentration on either side of the membrane | True |
| Proteins call aquaporins are important to the movement of water through cell membranes. these proteins participate in active transport | False |
| Moving materials from an area of low concentration to an area of high concentration requires active transport | True |
| A cell in a multicellular organism must be able to carry out all of the functions neccessary for life in order for the organism to survive | False |
| There is a division of labor among the cells of multicellular organisms | True |
| According to the cell theory, all cells come from existing | cells |
| Electrons pass through thin slices of cells or tissues and produce flat, two-dimensional images in | transmission electron microscopy |
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