You’ve just discovered an organism that lives in extremely cold environments. Which of the following would you predict to be true about the phospholipids in its membranes? Select the best answer 1. Hydrocarbon tails will be highly unsaturated 2. They will have extremely long hydrocarbon tails 3. Their hydrocarbon tails will be saturated 4. They will interact extensively with cholesterol 5. They will have a solid membrane

You’ve just discovered an organism that lives in extremely cold environments. Which of the following would you predict to be true about the phospholipids in its membranes? Select the best answer 1. Hydrocarbon tails will be highly unsaturated 2. They will have extremely long hydrocarbon tails 3. Their hydrocarbon tails will be saturated 4. They will interact extensively with cholesterol 5. They will have a solid membrane

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter2: Chemistry Of Life

Section: Chapter Questions

Problem 10RQ: Phospholipids are important components of_______. a. the plasma membrane of cells b. the ring...

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1) 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.
Molbcules with hydrophilic heads and hydrophobic tails group together to form round structures with the tails facing inwards when placed in water.What role does this molecule play in a cell?1.Stores genetic information2.Stores energy3.Forms membranes4.Catalyzes chemical reactions
Phospholipids are important components of_______. a. the plasma membrane of cells b. the ring structure of steroids c. the waxy covering on leaves d. the double bond in hydrocarbon chains
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 bilayer
You can choose one or more than one option Membranes are components of which of the following structures: CELL BIOLOGY basic Microtubules Nucleus Golgi apparatus Endoplasmic reticulum Mitochondrion 4 4. Which of the following compounds can be used to make glucose in animals? BIOCHEMISTRY basic Glycerol Lactate Pyruvate Lysine Valine Which of the following atoms is found in RNA and DNA: MOLECULAR BIOLOGY basic Iron Oxygen Carbon Sulfur Hydrogen On gene expression control what are the correct statements? MOLECULAR. BIOLOGY basic Eubacteria control translation of their mRNAs in their nuclei. RNA editing is a rare molecular process shared by Eukaryotes. Prokaryotes and Viruses The compactness of chromatin is the first point of gene expression control in Eukaryotes Bacterial transcription can be under either positive or negative control RNA interference leads to messenger RNA imRNA) digestion About the pituitary gland, what are the correct statements?…
What properties define the phospholipids that make up the lipid bilayer? Select all that apply. A. Nonpolar, hydrophobic hydrocarbon tails B. Polar, hydrophilic phosphate heads C. Nonpolar, hydrophobic phosphate heads D. Polar, hydrophilic hydrocarbon tails
1. Which of the following lipids have one or more fatty acids in their structure? Select all that apply Steroids Waxes Triglycerides Phospholipids None of the above contain fatty acids 2 What causes transmembrane proteins to remain within the membrane? One answer a. They are covalently attached to the extracellular matrix b. They are covalently attached to the membrane lipids c. They are hydrogen bonded to the fatty acid tails of the membrane lipids d. The have both hydrophobic and polar regions e. They contain only polar or charged amino acids 3. Unsaturated fats are liquids at room temperature because? One answer They have only two fatty acid chains attached to glycerol Their fatty acids are bent, limiting interactions between the molecules They are amphipathic, resulting in the formation of a bilayer Unsaturated fats are usually solid at room temperature Their fatty acids have only single bonds between carbons, allowing tight…
The structure of a lipid bilayer is determined by the particular properties of its lipid molecules. What would happen if A. Phospholipids had only one hydrocarbon tail instead of two?B. The hydrocarbon tails were shorter than normal, say, about 10 carbon atoms long?C. All of the hydrocarbon tails were saturated?D. All of the hydrocarbon tails were unsaturated?E. The bilayer contained a mixture of two kinds of phospholipid molecules, one with two saturated hydrocarbon tails and the other with two unsaturated hydrocarbon tails?F. Each phospholipid molecule were covalently linked through the end carbon atom of one of its hydrocarbon tails to a phospholipid tail in the opposite monolayer?
When phospholipids are carefully mixed with water they are observed to exhibit which of the following properties? a) Spontaneous organization into stable structures within the water environment, b) Orientation of the Phosphate parts of the molecule away from fatty acid (non-polar) environment of a bilayer, c) Hydrophilic orientation of the ionic section of the phospholipid molecules to the polar portions of the water molecules, d) All are true, e) None are true.
Decide whether each of the following molecules will pass through a lipid bilayer. If the molecule will pass through, type yes it will. If the molecule will not pass through, type no it will not. a. Glucose b. Glycerol C.water D. Oxygen gas
Which of the following molecules is not capable of forming lipid bilayers? a. glycolipids b. wax esters c. phospholipids d. cerebrosides
Which is true about the phospholipid membrane? Group of answer choices: A. It is made up of phospholipid molecules which have a hydrophilic tail and a hydrophobic head B. It is made up of 4 layers of phospholipid molecules C. It is made up of phospholipids, which have a hydrophilic head and a hydrophobic tail D. It is made up mostly of proteins but has cholestrol molecules and phospholipids embedded within it