Which property of water water has high heat capacity would help to account for how an individual who is exercising and producing excessive heat can maintain a constant body temperature? Baking soda is sometimes It is serving as a buffer to take up excess H+ used as an antacid. The ions from stomach acid. chemical name for baking soda is Sodium Bicarbonate. What is the bicarbonate doing to help with stomach upset? Of the following examples Water can move up a 100 foot pine tree from which best demonstrates the roots to the leaves. the property of water cohesion? Isotopes of an atom differ number of neutrons in their Which of the following is a release hydrogen ions when dissolved in a property of acids? liquid In what ways are Unmonitored release into the environment can radioactive isotopes make changes in a cell's DNA. potentially harmful? Engineers design city is less dense when it is frozen sidewalks using blocks of concrete separated by a small gap to prevent them from cracking. What property of water is being taken into account for this design? Water The atomic structure of having oxygen share electrons with two water satisfies the octet hydrogen atoms. rule by In the reaction 6CO2 + reactants 6H2O → C6H12O6 + 6O2 carbon dioxide is one of the Why do cells need to minimize the changes in pH of their internal buffering agents? environment Some insects can stride on has surface tension the surface of water because water The oxygen atom and hydrogen atoms form a Which of the following best describes the structure of how water molecules form and interact? covalent bond with one another to create stable outer shells of electrons. The electrons are shared unequally resulting in a polar molecule whose slight charges form weak hydrogen bond attractions with other water molecules. Which of these is a they behave the same chemically property of isotopes that make it useful in cell biology? Radioactive isotopes are an organism will take in a molecule with the useful in biological studies isotope and use it normally but the radioactive because decay can be detected. the reactivity of an atom the number of valence electrons depends on A covalent bond involves pairs of electrons the sharing of The figure below is depicting the interaction of water molecules with one another, which involves the use of hydrogen bonds Deoxyribose is a sugar DNA found in Digestion of sucrose, a two monomers disaccharide, results in A fat is formed when three dehydration reaction fatty acids join a glycerol by a Which of the following nitrogen-containing base, ribose, phosphate correctly lists the parts of a nucleotide of RNA? A gene in DNA is the code sequence of amino acids for The shape of a protein is a true critical factor in its function. Which of the following is glycogen forming glucose molecules NOT a dehydration synthesis reaction? In the diagram below, the monomer that serves as the subunit to creating this organic molecule category is called nucleotide Which of the following is CaCO3 not an organic molecule? The principle role for for creating energy sugars in living things is Glycogen is a ________ made polymer; glucose molecules of many __________. Humans store their glycogen polysaccharides in the form of Which one of the following enzymatic activity is a function of proteins? What makes saturated They possess no double bonds between triglycerides considerably carbon atoms making them more tightly less healthy than packed together. unsaturated ones? What category of lipids biological molecules are steroids included in? The "primary structure" of a number and sequence of amino acids protein refers to How does DNA differ from DNA is comprised of a double strand, RNA is a RNA? single strand. A molecule is said to be carbon and hydrogen atoms organic if it contains The term "functional" is that react a certain way with other molecules. used in the phrase "functional group" because it describes a group of atoms Which of the following is an C6H12O6 organic molecule? Which nitrogen containing thymine base is found in DNA but not in RNA? DNA is double stranded, contains the sugar deoxyribose and the nitrogen containing base DNA and RNA differ in that thymine while RNA is single stranded, contains sugar ribose and the nitrogen containing base uracil. In sickle cell disease, malformation of red blood cells is caused by only one mistake for one amino acid in the genetic code for hemoglobin. true Select the INCORRECT proteins- have 3 forms: monosaccharides, association: disaccharides, and polysaccharides What is a cell not able to bind to signal proteins from other parts of the do if it does not have body. receptor proteins? What do Eukaryotic cells the cytoskeleton use to move their organelles? Which of the following is an smooth endoplasmic reticulum - storage of INCORRECT match? water Mitochondria are necessary produce ATP to ______________________ in both plants and animals. What structure allows plant plasmodesmata cells to communicate with each other? What is a possible outcome fluids may leak out past the barrier the if certain tissues did not junction would create. have tight junctions? Match the CORRECT organelle to its function? mitochondrion - cell respiration Which organelle is not plasma membrane - provides strength to plant correctly paired to its cell walls function? In order to observe the cilia electron microscope on the surface of a paramecium (a single celled organism), what is the best device to use? Select the statement that Both plant and animal cells have a plasma accurately compares plant membrane and plant cells also have a cell and animal cells? wall. What is the function of the codes for the synthesis of ribosomal RNA nucleolus? The endomembrane system act as the control center of the cell does not What organelle would help lysosomes assist in the loss of the tail during the metamorphosis of a tadpole into a frog? Which is the function of a chloroplast? It converts light energy into chemical energy. Which organelle produces mitochondria ATP needed for cellular work? Mitochondria and are involved in energy conversions; are found chloroplasts both ________; in nearly all eukaryotic cells but are different in that mitochondria, but not chloroplasts, ______________. The hydrophilic portion of true a plasma membrane faces the outside of the cell and the cytoplasm. The size of a cell is limited surface area to volume ratio because of _____________ , which is critical to a cell's function. A characteristic of a does not have a membrane-bound nucleus. prokaryotic cell is that it Both prokaryotic and eukaryotic cells have these characteristics in common cytoplasm, a plasma membrane, and DNA. The plasma membrane pass through the membrane via proteins. blocks the passage of most molecules, therefore it is necessary for many molecules to Receptor proteins Junction proteins do not Both plants and animals are transmit information from outside the cell so that the cell can respond to stimuli. permit cells to recognize one another. plants have a cell wall eukaryotes, however they diffract in their cellular structure. What is the difference in their cellular structure? Which molecule would be CO2 able to pass freely through a plasma membrane? Entropy is best described disorder as Which of the following an apple made up of energy-rich examples does NOT macromolecules describe kinetic energy? Identify which of the ATP is comprised of a sugar, base, and two following statements is not phosphate groups. true. Which of the following ATP molecules would have the most potential energy to perform work for cell activities? Metabolic pathways are enzymes to help raise the energy of activation. known for all of the following EXCEPT Regulation of the enzymes feedback inhibition involved in metabolic reactions usually requires Simple diffusion of from an area of higher concentration to an molecules occurs area of lower concentration. Molecules move from facilitated diffusion higher to lower concentration through a transport protein in Osmosis includes both the diffusion of water and a semipermeable membrane. What prevents a plant cell cell wall from bursting in a hypotonic solution? When a cell is in a solution isotonic where the concentration of solute is the same in the cell as in the solution, the solution is called If blood cells are placed in the cells will shrink due to water loss by the a hypertonic solution cell. Which of the following is an Cells of our kidneys reabsorb water to prevent example of osmosis? it from all leaving through our urine. When a potted house plant The water creates a hypotonic environment is wilting, the addition of causing the cells to gain water. water quickly changes the look of the plant. This can be accounted for by which of the following statements: Which one of the following molecules is able to move across the cell membrane by simple diffusion? carbon dioxide Simple diffusion across a does not require energy from the cell plasma membrane is called passive transport because it Why do metabolic Each enzyme has a specific substrate and pathways require tens to produces a specific product. hundreds of different enzymes? Enzymes are able to speed lowering the energy needed for the reaction up the rate of a reaction by to proceed. The concentration of active transport calcium in a cell is 3%. The concentration of calcium in the surrounding fluid is 1%. How could the cell obtain more calcium? In feedback inhibition of a to the enzyme of the first reaction metabolic pathway, where does the inhibitor bind? Because it is a passive process, which membrane transport process can continue whether the cell is alive or dead? diffusion