LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the build up of complex molecules from simpler molecules and requires energy
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the breakdown of bigger molecules to smaller ones and uses energy
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the build up of small molecules into bigger ones and doesn’t require energy
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the breakdown of complex molecules into more simpler molecules and doesn’t require energy
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Detailed explanation-1: -Anabolic pathways build complex molecules from simpler ones and typically need an input of energy. Building glucose from carbon dioxide is one example. Other examples include the synthesis of proteins from amino acids, or of DNA strands from nucleic acid building blocks (nucleotides).
Detailed explanation-2: -Anabolic reactions require energy. Catabolic reactions release energy. Not all energetically favored reactions are spontaneous. Many times some energy of activation needs to be added.
Detailed explanation-3: -Anabolic reactions use energy to build complex molecules from simpler organic compounds (e.g., proteins from amino acids, carbohydrates from sugars, fats from fatty acids and glycerol); catabolic reactions break complex molecules down into simpler ones, releasing chemical energy.
Detailed explanation-4: -Anabolism is the process by which the body utilizes the energy released by catabolism to synthesize complex molecules. These complex molecules are then utilized to form cellular structures that are formed from small and simple precursors that act as building blocks.
Detailed explanation-5: -Anabolic reactions, or biosynthetic reactions, synthesize larger molecules from smaller constituent parts, using ATP as the energy source for these reactions.