OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Proteins are macromolecules and each cell consists of thousands of different proteins. It holds 10 to 15 percent of total cell mass. Nucleic acids such as DNA or RNA are present in each cell which act as a carrier of genetic information. Nucleic acid present in each cell is 5 to 7 percent.
Detailed explanation-2: -The final composition is 22% adenine, 22% thymine, 28% cytosine, and 28% guanine. Uracil is only found in RNA.
Detailed explanation-3: -The average composition of a living cell is water 70−90%, proteins 10−15%, nucleic acids 5−7%, carbohydrates 3%, lipids 2%, ions 1%.
Detailed explanation-4: -Nucleic acids are made of nitrogen-containing bases, phosphate groups, and sugar molecules. Each type of nucleic acid has a distinctive structure and plays a different role in our cells.