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Bio 1 notes
| Question | Answer |
|---|---|
| How might a plant cell compensate for the excessive membrane that occurs during prolonged exposures to elevate temperature? | after the lipid composition to have longer fatty acyl tails and fewer double bonds. |
| Which molecule passes through a lipid bilayer most readily? | carbon dioxide |
| Following a meal, glucose must be transported from the gut lumen where there is a high glucose concentration into intestinal cell where is a relatively low level of glucose. This movement is called | facilitated diffusion |
| Sodium concentrations are higher outside and glucose concentrations are higher inside the cell. Using the protein for Na+ and glucose transport, what is it called electrochemical gradient is used to drive transport into the cell against its concentration? | secondary active transport |
| The process that most involves the selective uptake of a specific cargo molecule into the cell through aggregation is? | receptor-mediated nendocytosis |
| Water diffuses through certain organs such as the kidneys and bladder much faster than would occur by passive through a lipid bi-layer alone. What accounts for this more rapid rate of water transport in these organs? | presence of aquaporin channels for facilitated diffusion of water |
| Which of the following statements about plasma membranes is incorrect? | They are relatively rigid structures |
| Which of the following is true of phospholipids that flip-flop across the lipid bi-layer? | the process requires energy and the flippase enzyme. |
| The function of membrane proteins include | Transport, cell signaling, catalyst, defense |
| Which of the following statements is correct about biomembranes? | The phospholipids impart fluidity to the membrane |
| Which of the following statements is true about peripheral membrane proteins? | May be removed from the membrane without disrupting the integrity of the membrane. |
| What is the major difference between active transport and passive transport? | Energy Requirement |
| A paramecium (single-celled organism) is placed in a hypertonic solution. Which of the following will occur? | Water will move out of of the paramecium into the surrounding solution |
| Which of the following is not true about channels? | Bind solutions in a hydrophilic pocket |
| What binds two or more ions or molecules and transport them in opposite directions across a membrane? | Antiporters |
| A plant will begin flowering in response to changes in length of daylight, temperature, and light quality. Thus which unifying principle of life? | Living organisms interact with their environment |
| Whether the external temperature is hot or cold, birds maintain an internal body temp of app an example of | Homeostasis |
| Which level of organization includes all of the others in the list? | Population |
| when cells in an organism associate with each other they form | tissues |
| a community of organisms interacting with their physical environment is called | ecosystem |
| Then grouping or classification of species is termed | taxonomy |
| When considering nomenclature for scientific names what is the difference between the two primates? Homo Sapiens, Homo Erectus | They are animals of a different species |
| The complete genetic composition of an organism is called its | geonome |
| All turtles are vegetarians. Bessie is turtle, therefore bessie is a vegetarian. This is an example of?? | Deductive reasoning |
| A broad explanation of some aspect of the natural world that is sustained by a large body of evidence is called | Theory |
| What is the appropriate order of these stages (1) Maple trees are grown in 2 green houses where the only variable is temp(15 degree c vs. 10 degree c) (2) The hypothesis is rejected (3)There is no statistical difference in the number of leaves dropped | |
| (4)the observation is that maple trees drop their leafs in autumn (5) the hypothesis is that maple trees drop their leaves because of cold temperatures | 4,5,1,3,2 |
| The atomic number of an atom is? | the number of protons in an atom |
| The nucleus of an atom is composed of ? | protons and neutrons |
| The first, inner most energy shell in an atom can? | can have a maximum of 2 electrons |
| When one atom loses an electron to another atom. It results in the formation of | cations an anions that can form ionic bonds |
| The strongest chemical bonds are are? | covalent |
| What type of of bonds form from the unequal sharing of electrons | polar covalent |
| Water.. | has a high surface tension |
| The most significant role played by pH buffers is to | limit major shifts in the amount of H+ and OH in solution |
| The addition of a strong acid like HCl to an aqueous solution would result in | Both the release of H+ and a decrease in Ph |
| You have been asked to synthesis a new isotope for cadmium. Which part of the original atom would you need to manipulate in order to create an isotope? | Neutrons |
| These are the smallest functional units of matter that form all chemical substances and that cannot be further reduced by ordinary chemical or physical means. | Atoms |
| Which of the following represents one of the most abundant elements found in living organisms? | Hydrogen |
| Altering the pH of a solution may affect? | shapes and function of molecules, ability of ions and molecules to dissolve in water, chemical reaction rates |
| These molecules have a single unpaired electron in their outer shell and can steal electrons from others lead to the cell membrane rupture or damage DNA. | Free radicals |
| What type of bonding is likely to occur between two water molecules or strands of DNA? | Hydrogen |
| All organic molecules contain? | A protein |
| a dehydration reaction | is used to form polymers |
| Glycogen is to animal cells as ______ is to plant cells | starch |
| a disaccharide, such as maltose, consist of two molecules of glucose linked by water | Glycosidic |
| identify the non-lipid molecule | Glycogen |
| The substance most rich in unsaturated fats is | olive oil |
| a phospholipid has _____ fatty acids attached to glycerol, where as a fat has ____ | 2, 3 |
| the macromolecules composed of amino acids is a | protein |
| the sequence of amino acids in protein is its ________ structure | primary |
| an amino acid is to a protein as a _____ is to a nucleic acid | nucleotide |
| Molecules that contain carbon, hydrogen, and oxygen in a ratio 1:2:1 are | Carbohydrates |
| Which if the following is not a property of a fat or fatty acid? | They are soluble in water |
| This class of macromolecules serves as important energy sources in animals to help meet quick energy needs? | carbohydrates |
| What level of protein structure involves the association of multiple polypeptides? | quaternity |
| Carbohydrates are polymers formed of structural units called | monosaccharides |
| Which of the following is not a component of nucleic acids? | glycerol |
| Large number of ribosomes are present in cells that produce? | proteins |
| The specialized structure that stores pigments, water, inorganic ions and maintaining turgor pressure | Vacuole |
| The route that most accurately describes secretory protein movement through the endomembrane | rough endoplasmic reticulum - Golgi apparatus - plasma membrane |
| What are the two major components of cell membrane? | phospholipids and proteins |
Created by:
calebgurley1