Question 2 What is one important process of life that relies on the ability of water to form hydrogen bonds? The condensation of polymers. The hydrolysis of monomers. The formation of lipids from carbohydrates. The adhesion of water to other molecules. Next \textgreater
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5.The polar nature of water molecules, where neighboring water molecules are attracted to each other by means of covalent bonds, is the key to understanding why life is impossible without water. Use the information presented on pages 35-38 of this week's reading to complete the following statements (3 pts). a. Water can help regulate temperature because water's hydrogen bonds can absorb large amounts of ________________, without a rapid change in ________________. b. Water is the most important solvent in life. Biological solutions like plant sap and blood plasma transport dissolved nutrients that are surrounded by ________________. c. Water is pulled inside a plant's vessels because water molecules attract other water molecules, a property called ________________. Also, water molecules can attach to other molecules the inside of plant's vessels through a property called ________________. 6. What is the main reason carbon compounds are so diverse? 7. Explain the following: a. What are the beneficial roles of polysaccharides such as glycogen and starch? b. Why is cellulose not digestible to humans? What benefits do we get from cellulose?
Madhur L.
Scientists examined the folded structure of a purified protein resuspended in water and found that amino acids with nonpolar R groups were primarily buried in the middle of the protein, whereas amino acids with polar R groups were primarily on the surface of the protein. Which of the following best explains the location of the amino acids in the folded protein? a. Polar R groups on the surface of the protein can form ionic bonds with the charged ends of the water molecules. b. Polar R groups are too bulky to fit in the middle of the protein and are pushed toward the protein's surface. c. Nonpolar R groups that cannot form hydrogen bonds with water are pushed into the middle of the protein. d. Nonpolar R groups from different parts of the protein form covalent bonds with each other to maintain the protein's structure. 2. Rosalind Franklin's x-ray diffraction images taken in the 1950s most directly support which of the following claims about DNA? a. The ratios of base pairs are constant. b. The nucleotide sequence determines genetic information. c. The two strands of DNA are antiparallel. d. The basic molecular structure is a helix. 3. Which of the following does not result from hydrogen bonding in water molecules? a. Cohesion c. Surface Tension b. Adhesion d. Dissolving fats 4. Why is water considered polar? a. Nonpolar covalent bonds in structure c. Polar covalent bonds in structure b. Ionic bonds in structure d. Hydrophobic interaction in structure 5. Which macromolecule(s) have nitrogen? a. Carbohydrates c. Nucleic Acids b. Proteins d. Nucleic Acids & Proteins 6. Which macromolecule(s) have phosphorus? a. Carbohydrates c. Nucleic Acids b. Proteins d. Fats 7. Which macromolecule(s) have sulfur? a. Carbohydrates c. Nucleic Acids b. Proteins d. Fats 8. Describes the forming of a bond between monomers with the removal of a water molecule. a. Hydrolysis b. Dehydration
Adi S.
Dehydration synthesis reactions typically require energy (ATP) input to carry out the reaction. This is an example of describes molecules that can mix with water. Oil is an example of a molecule that does not mix with water. Oils and similar types of molecules are termed Reactions that result in the production of polymers from monomers (taking smaller molecules and linking them together to form larger molecules) is an example of . Reactions that result in the production of monomers from polymers (taking larger molecules and breaking them down into smaller molecules) is an example of The addition of increases the acidity of a solution. A water molecule, as shown to the right, is polar. Explain polarity and why water is polar? H H Describe and explain the properties of water and why it is an important molecule to life.
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