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1. Why the river fish will die if we leave it in the sea?
2. Explain the types of bond present in a pond?
3. Explain irritability, coordination and behavior with an analogy.
6. Why oil gets hot faster than water?
7. Do we able to make all proteins in our body? Explain your answer.
8. By which biological macromolecule the outer cuticle of beetles and ticks are made?
9. Explain the procedure of enzyme formation in our body by drawing.
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- 5. Dietary fibers are refers to which kind of macromolecules? 6. Why protein is known as a molecular instrument through which gene is expressed? 7. Why in our body the enzymes work in a narrow range of pH?18. Where is the energy stored in ADP? a) Between the first and second phosphate bond b) Between the second and third phosphate bond c) Between the adenine and phosphate bond d) There is no energy stored in ADP 19. True or False: Any molecule can bind to any enzyme. 20. True or False: Carbohydrates are stored in our body (humans) as starch. 21. True or False: The nucleus is a membrane bound organelle. 22.Phospholipids are a) Hydrophobic only b) Hydrophilic only c) Hydrophobic and Hydrophilic d) None of the above1) Placing phospholipids in water will spontaneously form a spherical structure called a:Group of answer choices lumen ball sphingoid cytoskeleton liposome 2) Saturated fatty acidsGroup of answer choices Have each carbon "saturated" with hydrogen Have each carbon "saturated" with other carbons Have each carbon "saturated" with hydrogen and are solids at room temperature Are solids at room temperature Contain double bonds 3) In intestinal epithelia, glucose can be taken into cells against its concentration gradient. How can glucose be transported against its concentration gradient without the direct expenditure of ATP in intestinal epithelial cells?Group of answer choices It uses simple diffusion It uses the Glut1 transporter It uses the Glucose ATPase It uses the Glucose/Na+ symporter None of the above. Due to the Second Law of Thermodynamics, molecules cannot be moved against their concentration gradient.
- 3. Use the chemical structures shown on the next page to answer the following questions. Some questions may have more than 1 correct answer, so put down all correct answers. Some structures may be used to answer more than 1 question and some may not be used at all. a. Which molecules are amino acids? b. Which molecules are carbohydrates? c. Which molecule is a hydrophobic amino acid? d. Which molecules are lipids? e. Which molecule(s) possess at least one glycosidic linkage? f. Which molecule(s) possess at least one ester linkage? g. Which molecule(s) is a nucleic acid? h. Which molecule(s) is a nucleotide? i. Which molecules are polypeptides? j. Which molecules are steroids?1. When a pancreas cell gets the message to make more insulin, several organelles are involved with making the insulin and dumping it into the bloodstream. Name 4 organelles involved with this process and explain their function. 2. What were two things about biological molecules that has affected your thoughts about the food you eat? Be sure to include two different molecules and specifically how it changed your thoughts. 3. What is the pH of two items you find in your everyday life?1. Draw 8 phospholipid molecules arranged to show how the phospholipids will orient themselves on the surface of the water. This should be a single layer or monolayer. Label the hydrophilic and hydrophobic parts of a phospholipid. 2. Now draw 8 phospholipids, arranged so that they are submerged in the water while still maintaining the correct hydrophobic and hydrophilic interactions. This structure is called a micelle. 3) Draw a structure that is both submerged in water and contains water on the inside. Draw phospholipids oriented to form a cell membrane, with the tails in and the hydrophilic heads out.
- Consider molecule #1. How would these molecules arrange themselves when added to water? A. Would dissolve in water B. Would form a micelle C. Would form a bilayer1) Hydrogen bonds are critical to life because theyGroup of answer choices Are involved in the secondary structure of a folded protein Are critical for the properties of water Are involved in tertiary structure of a folded protein Are involved in base paring of nucleotides All of the above. 2) A transport system that moves two different solutes into the cell by diffusion (greater concentrations outside the cell than in it) could be called a(n) _______ Group of answer choices active symport active uniport active antiport passive symport passive antiport1. What percent of the total body water is contained within the interstitial fluid? Round your answer to nearest whole number, do not report a decimal (35 not 35.0), do not put the % symbol after the number 2. Identify the analogous protein molecule to a carbohydrate monosaccharide. 3. Identify a chemical reaction type that is both anabolic and endergonic.
- 1. Is there more than one way to fold a protein, given the conflicting demands of the different "R" groups and the protein existing in a watery environment? 2. Explain what an R group is. 3. Compare the backbone of a polypeptide with that of a nucleic acid. 4. Proteins perform critical functions in all of our cells. Without proteins, life wouldn’t exist. Think of some specific proteins and describe what function they perform. 5. Explain the difference between secondary and tertiary protein structures.1. Draw the structures of triacylglycerol, cholesterol, phosphatidylcholine, and sphingomyelin. 2. Identify the polar/charged groups and draw how water will orient itself around these groups. 3. Order these lipids from most hydrophobic to most hydrophilic. 4. Predict how the lipids will migrate on the TLC plate when the running buffer is an organic solvent. Keep in mind that although the lipid standards are dissolved in organic solvent, they can (by virtue of their polar/charged groups) interact with the polar silica matrix of the TLC plates.6. Plan a meal that contains all four major macromolecules you learned about. Explain how each macromolecule is essential to the functioning of the human body.