Which component of a phospholipid is found in the interior of a lipid bilayer? A

Question

Which component of a phospholipid is found in the interior of a lipid bilayer? A. Glycerol B. Fatty acid C. Phosphate group D. Choline The reactions in the pathways of glycolysis and the citric acid cycle break down glucose indo smaller molecules. Therefore, these pathways must be: A. Catabolic pathways B. Anabolic pathways C. Take place in animal cells, but not in plant cells D. Involve the reduction of glucose and its metabolic intermediates The sum of all chemical reactions that occur in a cell can be referred to as _______ A. Hydrolysis B. Catalytic C. Metabolism D. Reversible reactions The sodium potassium (Na^+/K^+) pump is an example of: A. An antiporter B. A symporter C. Passive transport D. Channel-mediated diffusion E. None of the answer options are correct Which sugar is found in the structure of adenosine triophosphate (ATP)? A. Glucose B. Glutamic acid C. Phosphate group D. Ribose E. Deoxyribose Weak covalent bonds, such as ones found in carbohydrates and lipids, have A. Little potential energy B. A lot of potential energy C. A lot of kinetic energy D. Little kinetic energy E. No potential or kinetic energy

Explanation / Answer

1. Fatty Acids

Lipid bilayer (Phospholipids bilayer) is the major component of cell membrane which is made up of fatty acid double sheets having head and tails. Heads are hydrophilic phosphate groups and tails have hydrophobic sites.

2. Catabolic process

Because in the catabolic process the larger molecules breakdown into simpler one. After catabolism the product will act as secondary metabolite in the reaction. So here in the reaction the Glucose will breakdown into two pyruvate molecules.

3. Metabolism:-

Because inside the various types of reactions takes place where some are breaking down the molecule and some are synthesizing the new product. So break down and synthesis both comes under the part of metabolism. It has two type catabolism and anabolism.

4. None

Because sodium potassium pump is the example of active transport which works in response to the potential gradient difference across the membrane for movement of ions.

5. Ribose

ATP is composed of adenine (purine base) which will be attached with the nitrogen atom and the pentos-sugar which is also known as the ribose sugar. Phosphate group will be attached at 5’ end of ribose sugar.

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