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Lindell Midterm
Question | Answer |
---|---|
Which list describes the organization within multicellular organisms from least complex to most complex? | Organelles, cells, organs, organism |
The diffusion of water is also called... | osmosis |
What element is present in all organic compounds? | Carbon |
Which organic compound has a two to one ratio of hydrogen to oxygen? | carbohydrates |
The cell membrane consists mainly of... | phospholipids and proteins |
The exchange of oxygen and carbon dioxide between the body and the air occurs in the cells of the alveoli in the lungs. What part of the cell is the location of this exchange? | cell membrane |
Which best describes carbons ability to form covalent bonds in straight chains, branched chains, or rings? | Carbon has 4 valence electrons |
What is the major function of the cell membrane? | To control what substances move in and out |
What are the 3 types of polysaccharides? | starch, cellulose, glycogen |
A student examines a cell under the microscope and observes that the cell contains many mitochondria. This is evidence that the cell uses a lot of... | energy |
Diffusion is best described as... | The movement of molecules from an area of high concentration to an area of low concentration |
What would happen to a saltwater protozoan it it is removed from it's normal habitat and placed in a freshwater pool? | Gain water through osmosis |
What organelles are found only in plants? | cell wall, chloroplast |
The process by which digestive enzymes breakdown large molecules into smaller molecules with the addition of water. | Hydrolysis |
Which of the following is a primary function of carbohydrates? | provide the body with energy |
A cell with 1% salt concentration is placed in a beaker with a 5% salt concentration. What will happen to the cell over time? | The cell will lose water and shrink. |
Which plant organelle is the site of photosynthesis? | chloroplast |
A student observed an animal cell under a microscope. After adding a drop of solution, the student observed that the cell burst, as shown below on the right. Which of the following statements explains the student's observation? | The concentration of solute in the cell was HIGHER than in the solution so water left the cell. |
What process moves gases such as oxygen through the cell membrane? | diffusion |
The characteristic of cell membranes that allows only some materials to move in and out of the cell is that the cell membrane is said to be... | selectively permeable |
What factors effect the rate of diffusion? | temperature, size, type of molecule |
Which substane is an inorganic compound that is necessary for most of the chemical reactions in living cells to take place? | Water |
What are the three parts of the cell theory? | 1. Cells come from pre-existing cells. 2. All living things are made of cells. 3. Cells are the smallest unit of life. |
Both active transport and facilitated diffusion involve... | the use of proteins |
As a result of diffusion, the concentration of many substances... | eventually becomes balanced on both sides of the membrane |
One difference between prokaryotes and eukaryotes is that... | prokaryotes do not have a nucleus |
Which types of cells would you expect to find the most mitochodria? | muscle |
What is the function of the cell membrane? | to allow substances in and out of a cell |
What is the funstion of the chloroplast? | the site of photosynthesis |
What is the function of the mitochondria? | powerhouse - provides energy |